tractor...operation and maintenance 41nstructions form30882-5 caterpillar db tractor serial numbers...

OPERATION ANDMAINTENANCE41NSTRUCTIONS

FORM 30882-5

CATERPILLAR

DBTRACTOR

SERIAL NUMBERS~

2U21513 - 2U2353713Al - UP

( ..Calerpillar Traclar CCl., General Offices, Peoria, Illinois. • Caterpillar Americas Co., Peoria,Illinois. • CaterpillAr Overseas S.A., Geneva. • Caterpillar of Australia Pty. Ltd., Mel·

, bourne. • Caterpillar' Brasil S.A., Sao Paulo. • Caterpillar Tractor Ca. Ltd., Glasgow. •Caterpilla(~f Canada Ltd., Toronto .• Caterpillar France S.A., Grenoble.

Foreword

Caterpillar products are a result of advancedengineering, skilled manufacturing, and the finestmaterials metallurgical science can select. Thousands of satisfying, economical working hours arebuilt into each machine.

Whether or not the owner derives the maximumservice from his machine depends largely on thecare exercised in its operation and maintenance.This book is written to give the operator essentialinformation regarding the day-to-day operation,lubrication and adjustment of the machine. Careful adherence to these instructions will result inassured economy.•More and more Caterpillar owners are depend

ing upon their dealer for service other than thecare and adjustments described in this book.This practice is recommended because Caterpillardealers have stocks of genuine Caterpillar partsand are equipped with tools designed and builtby Caterpillar. Their servicemen are factorytrained and are kept closely informed by the factory regarding advanced methods of servicingCaterpillar products - thus, in all ways they areequipped to render the best of service.T20841

Avoid Accidents

Most accidents, whether they occur in the air, inindustry, on the farm, at home, on the highways, orat sea, are caused by someone's failure to followsimple and fundamental safety rules or precautions. For this reason most accidents can be prevented by recognizing the real cause and doingsomething about it before the accident occurs.

Regardless of the care used in the design andconstruction of any type of equipment, there aremany conditions that cannot be completely safeguarded against without interfering with reasonable accessibility and efficient operation.

A careful operator is the best insurance againstan accident.

The complete observance 01 one simple rulewould prevent many thousands of serious injurieseach year. That rule is: "Never attempt to clean,oil or adjust a machine while it is in motion:'

T24352

Railroad Loading Rules

For domestic customers within continentallimits of the United States.

The loading rules and specifications published inAssociation of American Railroads Pamphlet No.MD-6, must be complied with when shippingTractors, Road Grading, Road Making, and FarmEquipment Machinery, on open top cars. Contactt~ local railroad agent or inspector for thesespecifications.

T24353

3

Table of Contents

LUBRICATIONINSTRUCTIONS

General Lubricating Information - Crankcase Lubricating Oil - Ball and Roller Bearing Lubricant - TrackRoller Lubricant - Transmission Oil - LubricationChart

OPERATION INSTRUCTIONSPreparing The Tractor For Use - Starting The Engines- Driving The Tractor - Steering The Tractor - Operating Over An Obstruction - Operating In Deep MudOr Water - Stopping The Tractor - Continuous Operation On Stationary Work - Stopping The Diesel Engine - Daily Care - Operating In Cold Weather -Storage

MAINTENANCEINSTRUCTIONSAir Cleaners - Crankcase Lubricating Oil System -Fuels - Care Of The Fuel Supply - Care Of TheDiesel Fuel Tank - Fuel System - Care Of The FuelFilter - Priming The Fuel System - Fuel InjectionEquipment - Starting Engine Fuel System - CoolingSystem - Radiator Sealed Pressure Overflow Unit -Fan Belt Adjustment - Valve Clearance AdjustmentStarting Engine Valve Clearance Adjustment - SparkPlug Adjustment - Starting Engine Magneto - Starting Engine Clutch - Flywheel Clutch - SteeringClutches And Brakes - Track Adjustment - FinalDrive Sprocket Hub Bearings - Drawbar - WashingGear Compartments - Transmission Lubricating OilSystem

ATTACHMENTINSTRUCTIONSRear Mounted Equipment - Generator And StartingEngine Electric Starter - Battery Care - Voltage Regulator - Lighting Systems - Wiring Diagrams

INDEX.

Page

6-23

· 25-41

· 43-86

· 87-93

.,.

94-95

Q)co1-.

6

Lubrication InstructionsGENERAL LUBRICATING INFORMATION

Careful attention to the following information on lubricants and theirproper selection will add much to performance. economy and long lifeof your tractor. The lubrication chart specifies the lubricants to be used.the points to be serviced and the hourly intervals of servicing accordingto "Hour Meter" hours.

All time intervals in the lubrication chart and maintenance instructionsare for "Hour Meter" hours. therefore. daily readings will tell when toservice the tractor. The "Hour Meter" is located on the right side of theengine at the rear of the fuel injection pump housing. It does not keeppace with the clock but when the crankshaft turns as many revolutionsas are made in an hour at normal operating speed. the dial advances onenumber.

COVER ON HOUR METER RAISED TO OBSERVE DIAL READING

Drain oil. check oil levels and refill compartments with the tractor level.It is best to drain oil when it is warm. after the tractor has run for sometime. Then. most of the sediment will be in suspension. and therefore.will readily drain.Use the brush supplied in the tool equipment to remove dirt from fit

tings and to clean mound air cleaners. breathers. and inspection coversbefore removing. Lubricate all miscellaneous points. not equipped withfittings.with crankcase lubricating oil every 60hours.Naturally. any precautions taken during cold weather to house the

tractor. cover it with a tarpaulin. or warm it before starting. will causemore rapid oil distribution and contribute to quicker starting. The engineshould always be allowed to idle at approximately half engine speed forseveral minutes after starting to assure adequate lubrication beforeoperating at normal load.

LUBRICATION INSTRUCTIONS 7

All oil companies have adopted the S.A.E. (Society of Automotive Engineers) viscosity number system which classifies crankcase lubricatingoils and transmission oils in terms of viscosity or fluidity. The oils withthe lower numbers are lighter, and flow more readily than do the oilswith higher numbers. The S.A.E. number refers only to the viscosity ofthe oil, and has reference to no other characteristic or property.The following topic recommends the types, viscosities and grades

of lubricants best suited for use in your tractor for various operatingtemperatures.

CRANKCASE LUBRICATING OIL(Abbreviated CO)

At temperatures above freezing, S.A.E.No. 30 oil should be used in allcompartments.At temperatures below freezing S.A.E.No. lOWoil should be used to

provide better lubrication at low temperatures and also to make crankingeasier. For a number of years S.A.E.No. 10grade crankcase lubricatingoil as classified by the Society of Automotive Engineers was recommended. A change in S.A.E.specifications for crankcase lubricating oil eliminates the S.A.E.No. 10grade which is replaced by S.A.E.No. lOWgrade.S.A.E.No. lOWoil should be fluid enough for easy cranking at tem

peratures down to at least -10°F. In lower temperatures it may benecessary to dilute S.A.E.No. lOWoil with kerosene (except in air cleaners) so it will be fluid enough to insure free circulation. Evaporation inthe engine crankcase under steady operation may make is necessaryto again add kerosene to maintain proper fluidity. This should be donebefore stopping, then operate the engine for a few minutes to mix thekerosene and oil.For an opproximate check to determine if the oil will flow in the Diesel

engine or flywheel clutch, remove the oil level gauge and if the oil onit will flowoff,the oil is fluid enough to properly circulate.

NOTE

Detergent type oils that are recommended for use in"Caterpillar" Diesel Engines will, within a short period ofoperation, become much darker in color. This should not beany cause for concern. The darkening of the oil is dueto minute particles of carbon, resulting from the combustionprocess, being held in suspension in the oil. This ability tohold carbon particles in suspension is one of the primaryfunctions of a detergent type lubricant. Otherwise, theseparticles would settle out, eventually leading to objectionable deposits in the engine. When the oil darkens, therefore, it is an indication that it is keeping the engine cleanand insuring satisfactory lubrication performance.

8 LUBRICATION INSTRUCTIONS

(CO) Superior Lubricants (Series 2): Only those lubricating oils knownas Superior Lubricants (Series 2) for "Caterpillar" Diesel Engines shouldbe used in the crankcase. These oils are recommended for meeting theoperating requirements of the engine on both low and high sulphur fuels.Consult your "Caterpillar" dealer for brand names of Superior Lubricants(Series 2) lubricating oils.

For recommended oil change period information, see the DIESELENGINE CRANKCASELUBRICATINGOIL CHANGEPERIODCHART.

DIESEL ENGINE CRANKCASE LUBRICATING OIL CHANGE PERIOD CHART

13AI-Up 2U21513-2U23537Fuel Sulphur Superior

Content Superior Lubricants Lubricants MIL-L-2104A(Series 2) Only (Series 2) Oils"

FilterOil Change Filter Change Oil Change Oil Change Change

Period Period Period Period Period0.4 'Y. or less 240 hrs. 240 hrs. 480 hrs. 240 hrs. 240 hrs.0.4% to 1.0% 120hrs. 120 hrs. 480 hrs. * 240 hrs.Above 1.0% 60 hrs. 60 hrs. 240 hrs. * 240 hrs.

*MIL-L-2104A oils not recommended when sulphur content of fuel is more than 0.4%.

**If Superior Lubricants (Series 2) are not available. crankcase lubricating oils meeting the requirements of MIL-L-2104A specification can be used successfully in thediesel engine crankcase of machines before 2U23537 when the fuel sulphur contentis less than 0.4%.

(CO) Straight Mineral, MIL-L-2104AOils Or Superior Lubricants (Series2): In compartments other than the Diesel engine crankcase where crankcase lubricating oil is recommended (such as starting engine crankcase,Diesel and starting engine air cleaners t and fuel injection pump housing) use either straight mineral crankcase lubricating oil, or oil conforming to the requirements of MIL-L-2104Aspecification or Superior Lubricants (Series 2) whichever is most convenient and economical.

BALL AND ROLLER BEARING LUBRICANT(Abbreviated BR)

(BR) This lubricant is a mixture of mineral oil and metallic soaps. UseNo.2 grade for most temperatures. For extremely low temperatures useNo. 0 or No. I grade.

This grease can be applied to all bearing points - plain bushings,ball bearings and roller bearings - where equipped with hydraulic pressure fittings or when bearings are hand packed.

t For air cleaners it is permissible to use clean undiluted reclaimed oil or the mostinexpensive straight mineral oil. Be sure to change oil in the air cleaners regularly.


Use only a high grade Ball and Roller Bearing Grease of short fiberThis grease must be satisfactory in anti-friction bearings at speeds up to3000RPMat a maximum temperature of 3000 F. It is a grease with sufficient adhesive qualities to cling to the bearings in all extremes of highand low operating temperatures. Greases of this kind have been classified by grades by the N.L.G.I. (National Lubricating Grease Institute)designated in order of "worked" penetration or consistency.

TRACK ROLLER LUBRICANT(Abbreviated RL)

(RL) This is a stringy, tacky lubricant of a semi-fluid consistency at theprevailing atmospheric temperature. This lubricant developed for trackrollers is recommended for use at points provided with button head fittings. It can be handled readily in the standard volume compressor.

In sub-zero weather, crankcase lubricating oils may be used whentrack roller lubricant is too heavy to be handled in the compressor.

TRANSMISSION OIL(Abbreviated TO)

(TO) Use a straight mineral transmission oil that will flow and will notchannel at existing operating temperatures. For temperatures abovefreezing use S.A.E.No. 90 oil. When operating continuously in extremelyhot temperature use S.A.E. No. 140 oil. Below freezing, an oil of lowerviscosity S.A.E. No. 80, will be required. In extremely cold weather theoil should be diluted with sufficientkerosene to provide fluidity.

CAUTION

Under no circumstances should the track be lubricated.The stiffness noted between the links of a new track is notcaused by a lack of clearance between the track pins andbushings, and it will disappear as the track wears in.

9A

REG. U.S. PAT. OFF.

LUBRICATION CHARTCATERPILLAR

DIESEL 08 TRACTOR

The folded page is arranged to serve two purposes:

First, it is a complete outline of all the information required to lubricate the tractor.

Second, the illustration and identification of points oflubrication can be used with the detailed illustrationsand information on the pages following the chart as areference for lubricating and service information.

Key ToLubricantsco Crankcase lubricating Oil TO TransmissionOil

RL TrackRailer lubricant BR Balland RollerBearing lubricant

Identification Of Points Of Lubrication, Lubricant To ApplyAnd Interval Of Service

Lubri- 5 10 20 60 120 240 480 900Point And Identification cant HRS HRS HRS HRS HRS HRS HRS HRS1 Steering Clutch Release Bearings 1ft X2 Track Roller Frame Inner Bearings 1ft ··X X3 Steering Clutch and Brake 1ft X

Control Shaft Bushings4 Universal Joint 1ft X5 Starting Engine Transmission TO X X6 Starting Engine Clutch Shift Collar CO X7 Startin1. Engine Clutch and 1ft XPinion ever Bearings8 Starting Engine Air Cleaner CO X9 Starting Engine Crankcase CO X X X X10 Top Starting Crank Gear Housing CO X11 Top Starting Crank Shaft Bearings 1ft X12 Diesel Engine Air Cleaner CO ·X X13 Fan Bearing 1ft X14 Fuel Injection Pump Housing CO X X15 Governor Contro! Shaft Bearings 1ft X16 Diesel Engine Crankcase CO X XLubricating Oil System17 Front Idlers ftL ··X X18 Track Carrier Rollers ftL ··X X19 Track Rollers ftL ··X X20 Flywheel Clutch Brake Bellcrank 1ft X21 Flywheel Clutch Compartment CO X X22 Track Roller Frame Outer Bearings 1ft ··X X23 Transmission TO X X X24 Final Drives TO X ··X X

Location Of Points Of Lubrication

·Only when operating in extremelydusty conditions.··Only when operating in extremelydusty conditions or deep mud and water.

10 LUBRICATIONINSTRUCTIONS

co Crankcase Lubricating Oil

6STARTING ENGINE CLUTCH

SHIFT COLLARFill oil cup every 20hours.

8STARTING ENGINE AIR

CLEANERInspect the oil in the air cleaner cup every60 hours. Wash and refill cup to oil levelbead when oil will not flow freely or ifthe sediment in the cup is 1/4 inch deep.See the topic, "Air Cleaners."

Refill the cup with the same S.A.E. gradeof oil as is used in the Diesel enginecrankcase and the same type of oil mayalso be used. However, it is permissible touse clean, undiluted reclaimed oil or themost inexpensive straight mineral oil.

See the topic, "Crankcase Lubricating Oil".

9STARTING ENGINE

CRANKCASEEvery 10 hours check oil level (3). Every120to 240hours, depending on dust, draincrankcase at (4), wash and refill at (2)to full mark on gauge. At every oil changewash and oil the breather (I). See thetopic, "Wash the Starting Engine Crankcase."

10TOP STARTING CRANK

GEAR HOUSINGCheck lubricant level at plug opening (2)every 120hours. Keep level to plug opening by adding lubricant through filleropening 0).



12DIESEL ENGINE AIR

CLEANER CUPInspect the oil in the air cleaner cup every10 to 60 hours depending upon dust conditions. Wash and refill both inner and outercups to oil level bead either when the oilwill not flow freely, the sediment in thecup is 112inch deep, or every 60 hours,whichever occurs first. See the topic, "AirCleaners."

Refill the cup with the same S.A.E. gradeof oil as is used in the Diesel enginecrankcase and the same type of oil mayalso be used. However, it is permissibleto use clean, undiluted reclaimed oil orthe most inexpensive straight mineral oil.See the topic, "Crankcase Lubricating Oil."

12DIESEL ENGINE AIR CLEANER

TRAY ASSEMBLYWhen the oil cup is removed for inspection, remove the air cleaner separable trayscreens, inspect and wash if dirty. Inspectthe inside of the air cleaner inlet pipe andclean if necessary. Clean the inside ofthe air cleaner inlet pipe every 60 hours.See the topic, "Air Cleaners".

14FUEL INJECTION PUMP

HOUSINGCheck oil level every 120 hours. Keepfilled to top of filler elbow. Drain at (I)and refill every 240 hours.

T6046



16DIESEL ENGINECRANKCASE

Check oil level with engine running. every10hours. Oil should be up to full mark (1)on gauge. See topic. "Crankcase Lubricating Oil"-also see Note A.


Drain crankcase at (3) and oil cooler at(2). while the engine is hot. For recommended oil change periods see the "Diesel Engine Crankcase Lubricating OilChange Period Chart". Also see the topics. "Crankcase Lubricating Oil" and"Crankcase Lubricating Oil System".


Open oil cooler vent valve (4) so the oilwill drain more rapidly from the oil coolereach time the crankcase is drained.

NOTE A: "Caterpillar" Diesel Engines are built in a clean modern Diesel enginefactory and each crankcase is filled with a good quality of new crankcase oil. Forthese reasons the initial crankcase oil change period for this engine should be atthe usual crankcase oil change period. See the "Crankcase Lubricating Oil ChangePeriod Chart:'



16DIESEL ENGINE CRANKCASELUBRICATING OIL FILTER

Remove the plug (5) from the filter baseto drain the unfiltered oil from the baseand replace the filter elements (6) withnew elements at 240 hour interval. Whenoil change periods are less than 240hoursinstall new elements at each oil changeperiod. See the topic, "Crankcase Lubricating Oil System".


After draining crankcase refill at (7) andstart the Diesel engine. Run engine fortwo minutes then add oil to bring levelto full mark on gauge.

16DIESEL ENGINE CRANKCASE

BREATHERWash breather element (8) each timecrankcase oil is drained. Pour 1/4 pint(0.12 liter) oil through element and replace.



21FLYWHEEL CLUTCH

COMPARTMENTCheck oil level in the clutch compartmentevery 10 hours with the engine stopped.Oil should be kept up to the full mark ongauge (1).

21FLYWHEEL CLUTCH

COMPARTMENTEvery 900 hours remove clutch inspectionfloor plate cover (2). then remove and disassemble breather (3) and wash the element by shaking it in some non-inflammable cleaning fluid that will dry free ofoil film.

21FLYWHEEL CLUTCH

COMPARTMENTEvery 900 hours drain the clutch compartment by removing drain plug (4). Engaging and disengaging clutch will force oilout of hydraulic booster cylinder.

Remove and wash oil pump suction screen(5) at each oil change period. Clean themagnetic drain plug. When removing thesuction screen be careful not to damagethe gasket. Install the suction screen anddrain plug.

LUBRICATIONINSTRUCTIONS IS


21FLYWHEEL CLUTCH

COMPARTMENTExtreme care should be taken to preventdirt getting into the clutch compartmentwhen removing the filler plug for filling.Remove clutch inspection floor plate cover.Remove filler plug (6) and fill compartment to full mark on gauge. Approximately4 gallons of oil is required to fill the compartment. Install filler plug tightly.

BR Ball And Roller Bearing Lubricant

1STEEBrnNG CLUTCH RELEASE

BEABrnNGSLubricate each bearing through fittings ontop rear of transmission case every 10hours. Two or three strokes from thegrease gun are sufficient.

2TRACK ROLLER FRAME

INNER BEABrnNGSLubricate two bearings every 20 hours.one fitting for each bearing. If operatingin deep mud or water. lubricate every 5hours.

•



3STEERING CLUTCH AND BRAKECONTROL SHAFT BUSHINGS

Lubricate bushings through fittings (1) and(2) every 20hours.

4UNIVERSAL JOINTS

Every 900 hours remove floor plate andlubricate universal joints through fittings(2). Care must be taken when lubricatingthe universal joint bearings so that the internal sealing rings are not damaged.

7STARTING ENGINE CLUTCH

AND PINION LEVER BEARINGSLubricate every 120hours.

11TOP STARTING CRANK

SHAFT BEARINGSLubricate bearing with one or two strokesfrom the grease gun every 60 hours.



13FAN BEARINGS

Lubricate every 240hours.

15GOVERNOR CONTROL

SHAFT BEARINGSLubricate the slide bar link lever shaftbearings with one stroke from the greasegun every 240hours.

20FLYWHEEL CLUTCH BRAKE

BELLCRANKRemove clutch inspection floor plate coverand lubricate the clutch brake bellcrankevery 20 hours through fitting (I).

22TRACK ROLLER FRAME

OUTER BEARINGSLubricate two bearings every 20 hours.one fitting on each side of the tractor.When operating in deep mud or waterlubricate every 5 hours.


RL Track Roller Lubricant

17FRONT IDLERS

Lubricate through fitting on both sides oftractor every 120 hours. If operating indeep mud or water. lubricate every 5hours.

18TRACK CARRIER ROLLERS

Lubricate rollers on both sides of tractorevery 120hours. If operating in deep mudor water. lubricate every 5 hours.

19TRACK ROLLERS

Lubricate each roller on both sides oftractor every 120 hours. If operating indeep mud or water. lubricate every 5hours.

LUBRICATIONINSTRUCTIONS 19

TO Transmission Oil

5STARTING ENGINETRANSMISSION

At 240 hours check oil level. Fill to filleropening. remove breather (I). disassembleand wash.

Drain at (2). wash. and refill starting engine transmission every 900 hours. Seetopic. "Washing Gear Compartments"".

23CHECK TRANSMISSION

OIL LEVELCheck transmission oil level every 120hours. Oil should be up to level mark ongauge (I).

Every 900 hours remove and disassemblebreather and wash the element by shakingit in some non-inflammable cleaning fluidthat will dry free of oil film.

23TRANSMISSION DRAINING

Drain the transmission case at (2) every900 hours. Wash compartment at eachdrain period.

Clean the collected particles from themagnetic drain plugs before replacing theplugs. See topic. "Washing Gear Compartments",


TO Transmission Oil

23TRANSMISSION OIL FILTER

Check the transmission oil filter elementevery 120hours. It is advisable to replacethe element with a new "Caterpillar" element when excessive sludging of the element is observed or every 480 hourswhichever occurs first.Service the transmission oil filter completely as described in the topic. "Transmission Lubricating Oil System".Drain the filter housing by removing theplug (4).

23TRANSMISSION FILLING

Fill housing at (3) to full mark on gauge.start the Diesel engine and run it at halfengine speed for two minutes with the flywheel clutch engaged. This will fill thefilter. oil passages and bearings with lubricant before driving the tractor.

24FINAL DRIVES

Check oil level by removing two fillerplugs. one for each side. every 120 hours.Keep lubricant to level of filler opening'.

24FINAL DRIVES

Drain compartment at 0). wash and refillit every 900hours (480hours when operat·ing in either extremely dusty conditions ordeep mud and water). See topic. "WashingGear Compartments".


Lubrication of Attachments(For further attachment infonnation see page 87)

The following list of identifying letters, names of attachments requiring lubrication, and type of lubricant required will help in lubrication ofattachments.

A. STARTING ENGINE ELECTRICSTARTER CO

B. BELTPULLEYDRIVE HOUSING BREATHER CO

C. REAR POWER TAKE-OFF CONTROL SHAFT (DIRECT DRIVE) BR

D. REAR POWER TAKE-OFF SHIFTER LEVER • BR

E. REAR POWER TAKE-OFF HOUSING (DIRECT DRIVE) TO

F. BELTPULLEYDRIVE HOUSING. • • • • • • • TO

Lubrication Points Charted Under Hourly Intervals By Lubricants

INTERVALS Every Every Every Every60 120 240 900

LUBRICANTS HRS. HRS. HRS. HRS.

CO A B

BR CoD

TO E-F E-F


ASTARTING ENGINEELECTRIC STARTER

Lubricate bearing with two or three dropsof oil every 120hours.


CO Crankcase Lubricating Oil

BBREATHERFOR BELT PULLEY

DRIVE HOUSINGRemove the breather every 240 hours andwash it with kerosene. Saturate elementwith oil and reinstall breather.

IR Ball And Roller Bearing Lubricant

CREAR POWER TAKE-OFF

CONTROL SHAFT(Direct Drive)

Lubricate bearing every 60 hours.

DREAR POWER TAKE-OFF

SIUFTER LEVERLubricate bearing every 60 hours.

LUBRICATIONINSTRUCTIONS

TO Transmission Oil23

EREAR POWER TAKE-OFF

HOUSING(Direct Drive)

Check oil level at plug (1) every 120hoursand bring level to plug opening. Over filling will cause excessive heat.

Drain housing by removing plug (2) every900 hours. Wash housing and refill to levelplug opening. See the topics. "WashingGear Compartments" and "ContinuousOperation on Stationary Work".

FBELT PUIJ.EY DRIVE

HOUSINGCheck oUlevel at level plug (2) every 120hours. Keep lubricant to level of plugopening. Over filling will cause excessiveheat.

Remove plug (1) to drain housing every900 hours. wash housing and refill. See thetopics. "Washing Gear Compartments" and"Continuous Operation On StationaryWork".

•

25

Operation Instructions(Information on Attachments for this tractor begins on page 87)

PREPARINGTHE TRACTORFOR USE

New Tractor Initial Service: The first duty of anyone charged with thecare and operation of a tractor is to give it a detailed inspection, and tolubricate all parts as directed in the LUBRICATIONINSTRUCTIONSsection of this book.

Fill the Diesel fuel tank, taking care no dirt, water, or other foreign substances are admitted with the fuel. Give particular attention to the details of fuel handling as outlined under the topic, CAREOF THE FUELSUPPLY.Fill the starting engine fuel tank with gasoline.

Fill the cooling system with clean soft water, or with the correct antifreeze solution if temperatures below freezing are likely to be encountered. See the topic, COOLINGSYSTEM.

During the initial operation of the tractor, the capscrews of the trackroller end collars, the track shoe bolts, the inlet manifold stud nuts andthe equalizer spring clips should be checked and tightened if necessary.Since these parts are subjected to continued stress, daily checks shouldbe made to prevent forced stops. See the topic, DAILYCARE.

New Tractor Recheck: After the first thirty days of operation, it shouldbe the duty of anyone charged with the care and operation of the tractorto tighten the Diesel engine exhaust manifold (1), the inlet manifold (2)and the starting engine manifold assembly (3).

After the first 240 hours of operation, the valve clearances shouldbe checked, and adjusted if necessary, as described in the topic, VALVECLEARANCEADJUSTMENT.

•

POINTS TO BE SERVICED ATRECHECK PERIOD

I-Diesel engine exhaust manifold. 2-Dieselengine inlet manifold. 3-Starting engine

manifold assembly.

26 OPERATION INSTRUCTIONS

During the initial operation of the tractor the sprocket hub bearingsare likely to require some adjustment. See the topic, FINALDRIVESPROCKETHUBBEARINGS.

New Operator's Responsibility: The operator who is given the responsibility of care and operation of a tractor already in service, should first,check it for necessary lubrication, fuel supply and coolant in the radiator.

Second, the tractor should have any necessary adjustments made toobtain satisfactory performance.

Third, if the tractor has been stored with oil in the cylinders, complywith the starting procedure under the topic, STORAGE.

STARTING THE ENGINES

Starting Engine

Before attempting to start the starting engine check the Diesel engineand tractor controls as well as the starting engine controls to see thatthey aNf:in the correct position for starting. Be sure to check the oil levelsin the Diesel engine crankcase, starting engine crankcase and the flywheel clutch comparhnent to make certain the oil is up to the full markon the gauges.

Position Controls for Starting:

Disengage the flywheel clutch (lever (2) pushed forward).

Shift the speed selector lever (1) to the neutral position.

Shift the forward and reverse lever to neutral.

CONTROLS IN STARTING POSITION

I-Speed selector lever. 2-Flywheelclutch control lever. 3-Brake lock

control. 4-Steering clutch brake pedal .

•

j.:....~ ; ,~,~:,:':.{.: ; .l.'_

.:~~~ ..Push the governor control lever forward as far as possible. f<if;-,~,~,

Apply the steering clutch brakes (4) and lock with the brake lock (3).

OPERATION INSTRUCTIONS 27

STARTING ENGINE TRANSMISSIONCONTROL LEVER IN HIGH

SPEED POSITION

STARTING ENGINE CLUTCHIN DISENGAGED POSITION

See that the starting engine transmission control lever is in HIGHspeedposition.

Move the compression release lever to the STARTposition.

Disengage the starting engine clutch by pushing the lever in towardthe Diesel engine block.

Open the starting engine fuel valve by unscrewing the fuel valve control (I).

COMPRESSION RELEASE LEVERIN START POSmON

STARTING ENGINE CONTROLSI-Fuel valve control.


Pull out the starting engine choke control rod (2).

Move the idling latch (3) to hold the starting engine governor leverin idling position.

TurnON the ignition switch (4).

STARTING ENGINE CONTROLS

2-Choke control rod. 3-Idling latch.4-Ignition switch.

•

Insert the crank in position and crank until the engine starts.

Pull the crank through a compression stroke. Do not attempt in anymanner to spin or push the crank through a cranking arc.

Temperoture will vary the length of time it is necessary to have thechoke <?:N~'"Actual experience in starting will determine this interval.Push in"the choke control rod as soon as the engine will run with thechoke OFF.

When the engine starts keep the speed low until the crankcase lubricating oil has a chance to warm up and better lubricate the engine.

Helpful suggestions for starting the starting engine in cold weatherare in the topic, OPERATINGINCOLDWEATHER.

Operating Starting Engine Electric Starter: To start the starting enginewith the electric starter, place the Diesel and starting engine controls inthe same position described in the preceding topic. Then crank the enginewith the electric starter by moving the control lever (1) back to engagethe drive gear and contact the starter switch.

In some instances, when attempting to engage the starter drive, it willbe found that resistance to movement of the control lever occurs beforethe starter switch is contacted. This is due to the starter sliding gear fail-


ELECTRIC STARTER CONTROLSI-Control lever. 2-Gear rocker knob.

ing to mesh properly with the mating gear on the flywheel of the startingengine. To correct, pull out the knurled knob (2) of the gear rocker, located in the starter mounting bracket, and turn the knob until the slidinggear meshes, permitting continued movement of the control to contactthe starter switch.

Diesel Engine

The following four steps should be carefully followed to prevent damage to the starter pinion or flywheel ring gear.

1. Check to see that the starting engine clutch and flywheel clutch aredisengaged.

2. Check to see that the starting engine is running at idle speed.

3. Apply the starting engine clutch brake to stop the starter pinion fromrotating by pushing the clutch control lever (I) all the way in towardthe Diesel engine and holding it there.

4. Engage the starter pinion with the flywheel ring gear by pulling outon the starter pinion control lever (2), then release the clutch brakeand partially engage the clutch to be sure of full engagement of thestarter pinion.


ENGAGING STARTER PINION

I-Clutch control lever.2-Pinion control lever .

•

Push in the choke control (3).

Release the idling latch (4) to let the starting engine run at full governed speed. Engage the starting engine clutch by pulling out the lever

STARTING ENGINE THROTTLE ANDCHOKE POSITIONS FOR FULL

GOVERNED SPEED

3-Choke pushed all the way in.4-Idlinq latch released .

•

as far as possible. If the engine slows to the stalling point when theclutch is engaged, as it might in cold weather, disengage the clutch andlet the engine pick up speed again. See the topic, OPERATINGINCOLDWEATHER.

During cold weather, or whenever the normal cranking speed cannotbe reached with the transmission control lever in HIGH position, thestarting engine transmissionwill be found quite beneficial.

To use the starting engine transmission for starting a cold engineproceed as follows:


1. Disengage the starting engine clutch by pushing the control leverin toward the Diesel engine.

ENGAGING STARTING ENGINECLUTCH

•

2. Shift the starting engine transmission into LOW as shown at (1).The transmission can be shifted from one speed to the other whenthe starter pinion lever is in either engaged or disengaged position.

STARTING ENGINE TRANSMISSION

I-Starting engine transmissioncontrol in LOW speed position .

•

3. Engage the starting engine clutch and after the cranking effortrequired is reduced, move the compression release lever to the RUNposition.

4. Allow the starting engine to turn the Diesel engine for several minutes as the heat of compression will assure easy starting.

5. Move the compression release lever to the STARTposition, disengage the starting engine clutch, shift the starting engine transmissionto HIGHand engage the clutch.


Move the compression release lever to the RUNposition as soon as thestarting engine is cranking the Diesel engine at normal cranking speed.The heat generated when the starting engine is cranking the Diesel engine against compression, and the circulation of the starting engine exhaust through the tube in the Diesel engine inlet pipe warms the cylinders, pistons, and combustion chambers to the starting temperature.

If in cold weather, or at any time, the compression of the Diesel engineprevents the starting engine from turning the Diesel engine fast enoughto start it, move the compression release lever to HALFposition. Whenthe lever is in this position, the compression is released on half of thecylinders and allows faster cranking. Move the compression releaselever to RUNposition as soon as the starting engine can turn the Dieselengine with the lever in that position.

Allow the starting engine to crank the Diesel engine against compression for a few minutes to add heat to the Diesel engine before starting it. Actual experience will determine the length of time necessary tocrank the Diesel engine to warm it sufficiently to assure easy starting.Altitude and temperature cause a variation in the length of time requiredto warm the engine before starting. In cold weather the cylinders andpre-combustion chambers must absorb more heat before reaching starting temperature than in warm weather. Even in warm weather someheat must be added by turning the engine against compression a fewminutes before injecting fuel.

COMPRESSION RELEASE LEVERIN RUN POSITION

POSITION OF GOVERNOR CONTROLLEVER FOR STARTING

After the starting engine has cranked the Diesel engine agamst compression until the Diesel engine is sufficientlywarm, pull out the plungerand move the governor control lever back to approximately half engine


speed position. If the Diesel engine does not start after it has turnedseveral revolutions, move the governor control lever to the extreme forward position with the plunger locked and let the starting engine turnthe Diesel engine a little longer to raise its temperature.

If the Diesel engine is thoroughly heated but does not start, make aninspection to see that everything is correctly set for starting. If smoke hasbeen coming from the Diesel engine exhaust, fuel has been reaching thecylinders. If no smoke has been evident when the governor control leverwas in the run position, check the fuel supply. If the Diesel fuel tank isempty or the fuel tank valve is closed, it will be necessary to prime thesystem as outlined under the topic, PRIMINGTHE FUELSYSTEM.Incase there may be water or dirt in the fuel system, or if the fuel injectionequipment is suspected, see the topic, FUELINJECTIONEQUIPMENT.

When the Diesel engine begins to run the starter pinion disengagesautomatically, but it is necessary to disengage the starting engine clutchby pushing the clutch control lever in toward the engine.

Stop the starting engine by closing the valve at the carburetor, allowing the engine to burn all the fuel in the carburetor. Then turn off theignition switch.

When the engine is warm and running at rated engine speed the lubricating oil pressure gauge should register in the "Operating Range". Alower pressure reading is normal at low idling speeds. If no pressure isindicated, investigate at once.

The temperature regulators within the Diesel engine cooling systemare designed to give an approximate minimum coolant temperature of1600F. (710C.). The maximum operating temperature will vary according

LUBRICATING OIL PRESSURE ANDWATER TEMPERATURE GAUGES

•


to the air temperature and load factor, but should never exceed boilingtemperature at the prevailing altitude.

Allow the Diesel engine to idle 5 minutes with the governor controllever in half engine speed position before applying the load.

DRIVING THE TRACTOR

The tractors are equipped with a constant mesh transmission whichis pressure lubricated. There are five forward and three reverse speeds.The forward and reverse lever controls the direction of travel.

The clutch level controls a locking mechanism which holds the slidingcollars in position. Thus speed change cannot be accomplished when theclutch is engaged.

Gear shift lever positions are illustrated here and on the instructionplate located on the governor control lever bracket.

STANDARD TRANSMISSION GEARSHIFT INSTRUCTIONS

(Tractors effective with 13A235)

Shifting from forward to reverse or reverse to forward in first, secondand fifth speeds on tractors effective with 13A235,or in first, second andfourth speeds on tractors before 13A235is accomplished without movingthe speed selector lever. Simple disengage the flywheel clutch and movethe forward and reverse lever to either the forward or reverse position.

STANDARD TRANSMISSION GEARSHIFT INSTRUCTIONS(Tractors before 13A235)


NOTE

The tractor will move forward in third and fourth speedon tractors effective with 13A235,or in third and fifth speedon tractors before 13A235,with the forward and reverselever in either forward or neutral positions.

When the Diesel engine has been running long enough to warm up,move the governor control lever to the idling position. Unlock the steering clutch brake lock and press the clutch control lever forward as far asit will go. This applies the clutch brake. Continue to press forward on thelever until the clutch stops turning. Move the speed selector lever intoposition for the speed desired and the forward and reverse shift lever inthe desired direction.

Carefully engage the flywheel clutch until the slack is taken up between the tractor and the load. Then, as soon as the tractor begins tomove the load, pull the clutch lever all the way back so that it will snapover center and remain fully engaged. Never move a load with the flywheel clutch only partially engaged as this causes heating and rapidunnecessary wear on the clutch plates.

NOTE

Before driving the tractor after transmission oil drain andfill periods, the transmission oil pressure system should becompletely filled. To do this, start the Diesel engine and runit at half engine speed for 2minutes with the flywheel dutchengaged.

STEERING THE TRACTOR

The tractors are steered by hand levers operating the steering clutches,and by pedals controlling the steering clutch brakes. The tractors havean over center type booster spring arrangement operating in conjunctionwith the steering clutch mechanism which minimizesthe effortrequired torelease the clutches. Release the steering clutch on the side toward whichthe turn is to be made by pulling back on that steering clutch lever. Apply the brake on the same side by pressing down on the pedal just hardenough to turn at the desired angle. Both controls should be handledsmoothly so the turn Willbe made evenly and not as a series of jerks.Just before the turn is completed, release the brake. Then engage thesteering clutch by releasing the control lever quickly but gently.

With the load behind the tractor it is seldom necessary to use thebrakes in steering, except for sharp turns, since the load acts as a brake.The brakes may also be used to hold the tractor back when going downgrade. The pedals may be locked in brake applied position to hold thetractor on slopes or when doing stationary work.


Steering Down Grade: When going down grade with the tractor pullingthe load, steer in the usual manner. If the load is pushing the tractor,the operation of the steering clutches is reversed. For example, to turnto the right under these conditions, release the steering clutch on theleft, but do not apply the brake. This allows the left track to travel fasterwhile the right track is held back by the engine which acts as a brake.

The pedals must be in the fully released position during normal operation of the tractor. Keep the feet oft the pedals except when it is necessary to apply the brakes.

OPERATING OVER AN OBSTRUCTION

The fact that the steering clutches are controlled by separate leversmay be used to advantage in running over an obstruction, such as a logor a ditch bank. Both of the clutches may be released slightly until thetractor balances on top of the obstruction. Then one clutch may be engaged gradually so that the tractor moves forward at an angle, overand down. If the tractor is being operated without a load it may benecessary to use the brakes.

OPERATING IN DEEP MUD OR WATER

If the tractor must be operated for any length of time in deep mud orwater, certain precautions are necessary. See that the plugs are in placeunder the steering clutch compartments. Lubricate the track rollers, carrier rollers, track roller frame inner and outer bearings, and the frontidlers every 5 hours. Inspect the oil in the final drives frequently for mudor water and drain, wash and refill if the oil shows the presence of anymud or water. The presence of mud in the final drives or the excessiveleakage of oil indicates the seals should be repaired. See the topic,LUBRICATIONCHART.

STOPPING THE TRACTOR

To stop the tractor when it is desired to allow the engine to run, disengage the flywheel clutch, place the speed selector lever and the forwardand reverse shift lever in neutral position and move the governor controllever to reduce the engine speed. Engage the flywheel clutch.

NOTE

The tractor will move forward in third and fourth speedon tractors effective with 13A235,or in third and fifth speedon tractors before 13A235with the forward and reverselever in either forward or neutral positions.


The brake lock control is provided to lock both steering clutch brakesin the applied position to hold the tractor on slopes or when doing stationary work. Either the right or left brake pedal or both may be lockedin applied position by applying the brake and moving the brake lockcontrol forward.

BRAKE LOCK CONTROL

•

CONTINUOUS OPERATION ON STATIONARY WORK

The transmission gears and bearings in the tractor are adequately lubricated when the engine is running with the flywheel clutch engaged, butthe forward and reverse lever and the speed selector lever should alwaysbe placed in the neutral position.

When these instructions are followed, the transmission upper shaft,bearings and gears are lubricated.

STOPPING THE DIESEL ENGINE

After the normal load is removed from the engine allow it to idle fiveminutes with the governor control lever at half engine speed positionbefore stopping.

Move the governor control lever to the extreme forward position.Leavethe Diesel fuel tank valve open.

If the tractor must stand without shelter, cover the exhaust pipes toexclude rain or snow. Rain traps for this purpose may be obtained fromyour "Caterpillar" dealer. If the temperature is below freezing, or iffreezing weather is expected before the engine will be started again,drain the cooling system or protect it with an anti-freeze solution. See thetopic, COOLINGSYSTEM.


RAIN TRAP FOREXHAUST PIPES

•

DAILY CARE

A daily check of the tractor should be made to see if there are anyloose nuts, bolts, capscrews, or parts worn to such an extent that theyare no longer serviceable. The capscrews of the track roller end collars,the inlet manifold stud nuts, and the equalizer spring clip nuts are typicalof points which should be checked frequently and kept tight, since theseparts are subjected to continued pounding. Particular attention shouldalso be given to keeping the gasketed joints of the final drive cases tightto prevent leakage and possible damage to parts through excessivemovement. If corrective steps are taken immediately upon discovery ofloose or worn parts, fewer enforced stops and more economical operationwill result.

Dirt should not be allowed to accumulate on the tractor. A fewminutesspent daily in keeping it clean are well repaid in improved appearance,and greater ease and safety in operation, lubrication and maintenance.

Check the cooling system each day, and if necessary, add water oranti-freeze solution.

Fill the fuel tank at the end of the day's run. See the topic, CAREOFTHEDIESELFUELTANKforother periodic care.

The "Hour Meter" which is located on the right side of the engine atthe rear of the fuel injection pump housing, should be read daily. Fromthe daily readings, the lubricating time of all parts as directed under thetopic, LUBRICATIONCHART, can be determined. The "Hour Meter"readings should also be used in determining maintenance service periods.

When the Diesel engine is operating continuously, the starting engineshould be run for a few minutes each day to dissipate condensation andrenew the oil film on the bearing surfaces and cylinder walls.


If the tractor must stand without shelter the operators seat cushionsshould be tipped as shown. When this is done the water proof covering

SEAT CUSHIONS TIPPED TOPROTECT PADDING

•

prevents moisture entering the padding under the covering. If the cushions are turned bottom side up in rainy weather the padding under thewater proof covering may become damp. Thismoisture with accumulateddirt and heat will shorten the lifeof the cushion.

OPERATING IN COLD WEATHER

If the starting engine and the Diesel engine are both in good mechanical condition, and precautions necessary for cold weather operation aretaken, ordinary cold weather will not cause difficulty in starting or lossof efficiency.

Lubricants: As the atmospheric temperatures become lower, wherewarm housing facilities are not available, lubricants of lower viscosityshould be used. See the topic, CRANKCASELUBRICATINGOIL.

Coolant: When the temperature is below freezing, sufficient anti-freezesolution should be used in the cooling system to prevent freezing. Seethe topic, COOLINGSYSTEM.

The liquid in the cooling system may be warmed to make starting easier and quicker. When warming anti-freeze solutions, keep away fromflames, as some of these solutions may be inflammable. Avoid getting thesolution hot, and even a warm solution should be poured very slowly intoa cold cooling system to prevent damage by sudden expansion.

Fuel: Fuel must be "free flowing" enough to flow readily through thefuel lines at the lowest temperature at which the tractor will be startedand operated. For additional information,see the topic, FUELS.


Starting the Starting Engine: If the tractor has been standing withoutshelter in extremely cold weather, the following suggestions will materially assist starting.

It is very important to keep low viscosity crankcase lubricating oilup to the fullmark on the gauges, in the Dieselengine crankcase, startingengine crankcase and flywheel clutch compartment to provide properlubrication when starting. Refer to the topic, CRANKCASELUBRICATINGOIL.

Crank the starting engine several revolutions with the ignition switchoff, and the starting engine clutch disengaged. Thiswill better distributeoil to the bearings and cylinder walls.

Sometimes moisture, or fuel which has not vaporized, collects on thestarting engine spark plugs. They may be dried out by removing themand pouring gasoline over the electrodes. Ignite the gasoline and allowit to burn. Use care to prevent fire.

Pouring a small amount of gasoline on the electrodes before they arereplaced in the engine is more effective in promoting combustion thanpriming the cylinders with gasoline. A small amount of gasoline in thecylinders will remove the filmof oil from the cylinder walls and interferewith compression.

Avoid over-choking and over-priming the starting engine when attempting to start it.

Sometimes the starting engine can be started more quickly by leavingthe idling latch free of the governor control lever.When the engine startslock the idling latch under the governor control shaft to keep the enginespeed low until the crankcase lubricating oil has a chance to wann upand better lubricate the engine.

STORAGE

Lubricate all points mentioned in the lubrication chart if the tractoris to be stored or left standing for any length of time. This will protectagainst rusting.

Diesel Engine: If the tractor is to be stored or left standing for a longperiod of time, the lubricating oil may drain away from the cylinderwalls and piston rings. This lack of lubricant permits the rings and linersto rust. It also permits unnecessary wear caused by metal-to-metal contact between the pistons, rings and liners when the engine is started before fresh oil has reached these surfaces. The lack of lubricant may notcause any noticeable change in engine operation after it has been started but it does contribute to shorter engine life.

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SNOIl::>nS1SNI NOIlY1l3:dO

43

Maintenance InstructionsThe foregoing paragraphs have been devoted to instructionswhich are

necessary for day-to-day operation of the tractor. The following topicsgive detailed instructions regarding the care and adjustment of thevarious parts.

Am CLEANERS

The air cleaners do their work efficientlyonly as long as the oil in thecups flows freely at operating temperature, so it will spray into the filtersection and wash back the dirt collecting there. For this reason, air cleaners should be inspected frequently and serviced according to the following instructions.

Diesel Engine Air Cleaner: The air cleaner on a Diesel engine willclean and pass a greater volume of air in a day's run than the air cleaneron a spark ignition engine doing the same work under like conditions.Each Diesel cylinder receives a full charge of air on every inlet stroke,regardless of the engine speed or the amount of work the engine isdoing; whereas the total volume of air taken in by a spark ignition engineis regulated by the position of the throttle plate in the carburetor andchanges with varying loads.

The interval between the oil changes and cleaning will vary with theweather and the working conditions. During the dry, dusty months andon jobs where dust conditions are severe, it may be necessary to servicethe Diesel engine air cleaner very frequently, possibly every 10 hours.In damp weather, and on jobs where there is little or no dust, this operation may be necessary only once every 60 hours. However, dependenceshould not be placed in visible detection of the dust, or lack of dust, inthe surrounding air as a basis for servicing the air cleaner. The oil in theair cleaner may become saturated with dust, due to its fineness, muchmore rapidly than in instances where dust is more apparent in the incoming air.

Accumulations of sediment in the oil cup indicate that the heavierparticles of dust have been satisfactorily removed from the incoming air.Some fine particles of dust become suspended in the oil without leavingany noticeable sediment in the cup. The oil in the cleaner cup should bechanged when it will not flow freely at operating temperatures becauseof fine dust particles in it or an oil of too high a viscosity,when the accumulated sediment in the bottom of the cup is approximately liz inchdeep or every 60hours, whichever occurs first.

If any great amount of chaff, lint, leaves or other similar materials arepresent in or floating on the oil, the oil should be changed regardlessof the amount of sediment in the cup. The presence of these materials inthe air and oil tends to plug the separable tray screens and cause exces-

44 MAINTENANCE INSTRUCTIONS

sive oil loss from the air cleaner to the air inlet manifold. Evidence ofthis condition is indicated by a wet but clean air cleaner outlet andmanifold. This condition should be avoided as it will shorten engine service life.When a cleaner is operating in its normal manner, there is generally

a very small amount of very fine dust which may pass through thecleaner. There may also be a slight amount of oil lost. The combination ofthese in time will produce a dusty dry or dirty damp air cleaner outlet.This condition is normal. It is much better than the outlet which is runningwith oil but clean.

Inspect the Oil in the Diesel and Starting Engine Air Cleaner Cups:Every 10 to 60 hours, depending upon operating conditions, inspect theoil in the Diesel engine air cleaner cup. The air cleaner cup should bewashed and refilled every 60 hours or when the oil in the cup will notflow freely at operating temperature, or if the sediment in the cup is Ihinch deep (1/4 inch in a starting engine air cleaner), whichever occursfirst. It may be necessary to inspect the oil in the starting engine aircleaner cup only every 60hours.1. Loosen the wing nuts and take off the Diesel engine air cleaner cup.

a. On starting engine air cleaners the oil cup is removed by unscrewing the fastening bolt.

Some thickening of the oil in the cup should be no cause for alarm,actually it can be considerably thicker than the S.A.E. grade that waslast put in the cup, as long as the oil at operating temperatures will flowfreely. For a check to determine if the oil will flow freely, dip into the oilwith a finger and if the oil on it will flow off, the oil is fluid enough toflow freely.

2. Service other parts of the air cleaner while the oil cup is removed, asindicated in the following topics.

3. When refilling the oil cup, care should be taken to see that both theinner and outer cups are filled to the oil level bead. In temperaturesabove freezing S.A.E.No. 30 oil should be used. In temperatures below freezing use S.A.E.No. lOWoil. Donot dilute S.A.E.No. lOWoil.

4. When replacing the oil cup on air cleaners, check to see that theseal between the air cleaner cup and body is in place and in goodcondition. This seal prevents oil running over the cup during hillsideoperations, and air leakage at this point can possibly upset properair cleaner action.

Never attempt to change the oil in the air cleaner cup when the engineis running. This will cause dirty oil to be held in the filter section by intake action. The dirty oil held in the filter section will contaminate thefresh oil, and also cause an abnormally high oil level which may allowoil in the screens to be carried into the engine resulting in overspeeding.

MAINTENANCE INSTRUCTIONS 45

Wash Air Cleaner Lower Filter Section: At every air cleaner cup service period, between 10 to 60hours, depending on operating conditions,wash the separable tray screens.

REMOVING AIR CLEANER SEPARABLETRAY

I-Wing nuts. 2-Separable tray.3-Thumb screws.

•

1. Remove the separable tray (2) by loosening the wing nuts (1) thathold it in place.

2. Turn the separable tray slightlyand slip it offthe air inlet pipe.3. Disassemble the separable tray by loosening the thumb screws (3)

and liftout the screens.4. Wash the separable tray screens with a brush in kerosene or some

non-inflammablecleaning fluid.

AIR CLEANER SEPARABLE TRAYDISASSEMBLED

3-Thumb screws. 4-Screens .

•

5. Assemble the separable tray by placing the screens (4) in the tray,and tightening the thumb screws.

6. Install the separable tray to the air inlet pipe.7. Make sure all connectionsare tight and install the air cleaner cup.


Inspect the Inside of the Air Cleaner Inlet Pipe: Every 10 to 60 hours,depending on operating conditions,when the air cleaner cup is removedto clean the tray assembly and screen or separable tray, inspect the inside of the air cleaner inlet pipe by reaching up from the bottom of thepipe. If heavy accumulation of dirt is noticed, clean the pipe.Every 60hours clean the inside of the air inlet pipe by pushing a clean

rag through the opening in the pipe. Where the air cleaner inlet pipeextension is used, disconnecting the pipe from the air cleaner instead ofremoving the pre-cleaner will be satisfactory.

Wash the Entire Air Cleaner: At least once a year-more often in dustyconditions-wash the entire air cleaner.1. The entire air cleaner should be removed fromits support in order to

thoroughly clean the upper filter section in the cleaner body.2. Remove the oil cup, and separable tray.3. Immerse the entire cleaner in kerosene or some non-inflammable

cleaning fluid. Steam cleaning is not recommended because someforms of dust rolls into small balls when steam is applied, and theseballs cannot be washed out of the screens.

4. Wash the oil cup, and separable tray as outlined in the precedingtopics.

5. Dry the air cleaner parts thoroughly and reassemble them, makingcertain all connectionsare air tight.

Wash Starting Engine Air Cleaner: Twice a year wash the startingengine air cleaner.1. Unscrew the wing nut at the top of the hood assembly and liftoffthe

entire air cleaner.2. Disassemble and wash the filter and hood assemblies by shaking

them in a pan of kerosene or some non-inflammable cleaning fluid.3. Wash and refill the oil cup.

REMOVING STARTING ENGINEAIR CLEANER

•


4. Assemble and install the air cleaner, but be sure the mating faces ofthe air cleaner and the cleaner pipe are clean, the gasket betweenthem is in place and all connections are air tight.

Pre-Cleaner Care: The pre-cleaner is recommended to lengthen aircleaner service periods because it removes some of the dirt from theinlet air. For this reason, always install the jar (2) correctly and replaceeither a broken jar or gasket immediately, because the pre-cleaner willnot work properly without them. Remove and empty the jar before itbecomes three-fourths full by loosening the screw clamp (I) that holdsit in place. Inspect the fins in the pre-cleaner regularly and when theyare dirty remove the entire pre-cleaner and wash it in water.

PRE-CLEANERI-Screw clamp. 2-Jar .

•

Air Inlet Pipe Extension: Where dust conditions are severe, dust andabrasives may be carried in a heavy cloud rising to the height of the airinlet. In these conditions an air inlet pipe extension, which is availablefromyour "Caterpillar" dealer, will put the pre-cleaner up where the airis cleaner, reducing engine wear and the frequency of air cleaner service.

Am INLET PIPEEXTENSION

•


CRANKCASE LUBRICATING On. SYSTEM

The engine is equipped with a full-flowcrankcase lubricating oil filter.The filter has one large filter element only in each filter housing.

The filter elements should be replaced with new elements at every 240hour interval. When oil change periods are less than 240 hours installnew elements at each oil change period.

To service the filter:

1. Remove the drain plug (6) from the oil filter base (5). Then loosenthe clamp screw (1) and remove the cover (3) and screw as a unit.

2. Liftout the full-flowelements (2) and discard them.

3. Install new "Caterpillar" elements in the housings (4).

4. Reinstall the cover, tighten the clamp screws and replace the drainplug.

FULL-FLOW CRANKCASELUBRICATING OIL FILTER

I-Clamp screw. 2-Full-flow element.3-Cover. 4-Housing. 5-Filter

base. 6-Drain plug•

•

Full-Flow Crankcase Lubricating Oil Filter Element: The full-flowelement is of the plastic impregnated paper type. The impregnated paper(1) is pleated around a center core and encased within a perforatedcover (2).

The filter housing, cover and element are designed to seal unfilteredoil from the filtered oil side of the element. Sealing is accomplished bya spring loaded flat plate in the cover which holds the element againstthe flat plate at the bottom of the housing.


•

FULL-FLOW Fn.TER ELEMENTI-Impregnated paper.2-Perforated cover .

Wash the Diesel Engine Crankcase: Wash or flush out the crankcaseoccasionally to remove the foreign particles that accumulate there. At atime when it is necessary to change the crankcase lubricating oil, drainthe crankcase, oil filter housing and oil cooler while the engine is hot.Replace the drain plugs and pour two gallons (7.6liters or 1.7Imp. Gal.)of flushing oil into the crankcase. Run the engine for three minutes, notingthat the lubricating oil pressure gauge shows pressure. Then drain theflushing oil from the crankcase, compartment in the filter base and theoil cooler.

NOTE

Flushing oil may be used again if foreign matter is allowed to settle and then removed.

Wash The Starting Engine Crankcase: Remove the drain plug whilethe engine is warm. Replace the plug and refill the crankcase with Iljzquarts (1.4 liters or .031Imp. Gal.) of flushing oil. Run the engine 3 minutes and drain. Refillwith fresh oil of the correct viscosity. See the LUBRICATIONINSTRUCTIONSsection of this book.

FUELS

As a source of power the Diesel engine has two outstanding advantages over the gasoline engine. The first is its lower rate of fuel consumption - the second its ability to use cheaper fuels. Customers should always buy the lowest priced fuel giving satisfactory operation.

Your "Caterpillar" dealer is familiar with fuels that are giving goodresults in "Caterpillar" Diesel Engines in his territory. If necessary, consult him for his recommendations. He will be glad to advise you.


Because of the lack of world-wide standardization of Diesel fuel classifications, it is not possible to make specific recommendations for exportterritories. For best results see your "Caterpillar" dealer for brand namesof satisfactory fuels in your particular area.

In the United States and Canada, Diesel fuels are available under twogeneral classifications. One is "premium" fuel and the other is "domesticfurnace oil", No.2 grade.

"Caterpillar" Diesel Engines are designed to operate on the less expensive domestic furnace oils. For a number of years No.3 domesticfurnace oil as classified by the American Society for Testing Materialswas recommended. A change in furnace oil specifications eliminates theNo. 3 grade which is now described as No.2 grade. Fuels falling withinthis general class are widely available, give satisfactory results and costconsiderably less than "premium" fuels.

There is appreciable variation in the composition of fuels furnishedunder the domestic furnace oil classification.For desirable engine service,it is most important to give special attention to two properties of the fuelwhich are; pour point and sulphur content.

Pour Point

In subzero (-18°e.) weather, where warm storage is not provided,fuels with unusually low pour points may be required. It is necessarythat it be fluid enough to flow from the Diesel fuel tank to the enginetransfer pump at the lowest temperature at which the engine must startand operate.

Sulphur Content

As the sulphur content of the fuel increases, the oil change periodsshould be reduced as indicated in the topic, CRANKCASELUBRICATINGOIL.

CARE OF THE FUEL SUPPLYKeep The Fuel Clean: Too much emphasis cannot be placed on the

importance of using only clean Diesel fuel. In selecting a fuel, it shouldbe pointed out that distillates are especially desirable because, in refining, they are heated to a vaporous state and condensed in another container; thus, all the sediment and residue remain in the still.

It is important to buy clean fuel, and keep it clean. The best fuel canbe rendered unsatisfactory by inadequate storage facilities or careless


handling. The clearance between the fuel injection pump plunger and thebarrel is very small, actually less than .0001" (0.00254mm.),which makesit evident that the invisible particles of dirt which might pass throughthe filterscan damage these finely finished parts.

Effort should be constantly expended to prevent contamination of thefuel. An important step is to reduce the number of times the fuel must behandled. When the fuel can be delivered by the distributor to storagetanks and then pumped from the storage tank to the Diesel fuel tank, thehandling is reduced to a minimum.

The illustration of a fuel storage tank is a typical, satisfactory installation. Since natural settling is an effectivemethod of cleaning Diesel fuel,the fuel should be allowed to stand at least 24 hours in the storage tankafter it has been filled before fuel is transferred to the Diesel fuel tank. Besure to drain all water and sediment that has settled to the bottom ofthe tank before the tank is refilled. Occasionally, drain all of the fuel andclean the tank thoroughly.

CLEAN FUEL

j_T-~-t:-=--::'--~--=--=--=--=--:==:--=-~-~~~~~~4"

TI617LEVELGAUGE

WATER SEDIMENT

The use of cans, funnels, and drums should be discouraged, since it ispractically impossible to keep this equipment absolutely clean. If drumsmust be used, they should be allowed to stand for at least 24hours before

RECOMMENDED FUEL STORAGE TANK


drawing off fuel. A pump installation similar to that shown with thestorage tank should be used. The drum should stand on end and the inletfor the pump be kept several inches above the bottom to prevent stirringup the sediment that settles to the bottom.

Whatever method is used, see that only clean fuel enters the Dieselfuel tank.

CARE OF THE DIESEL FUEL TANK

Fill the Diesel fuel tank at the end of the day, because the incomingfuel will drive out the moisture-laden air and prevent condensation.

Diesel Fuel Tank: The fuel level in the Diesel fuel tank may be checkedwith the plunger gauge (1) in the filler opening. Every 120hours beforestarting the engine, open the drain cock (3) and drain off any sedimentor water which may have accumulated. The strainer (2) in the Dieselfuel tank filler opening should be removed and cleaned regularly. Remove the snap ring and liftout the strainer.

DIESEL FUEL TANKI-Plunger gauge. 2-Strainer.

DIESEL FUEL TANK DRAIN3-Drain cock.

Diesel Fuel Tank Filler Cap: The Diesel fuel tank filler cap elements(2) should be washed every 60 to 240hours depending upon the amountof dust in the air. To do this, remove the capscrew (4) and take out thebaffle plate (1) and gaskets (3). Wash the cap and elements in keroseneor some non-inflammable cleaning fluid. After the cap is washed pour asmall amount of crankcase lubricating oil on the filter elements.


FUEL TANK FD.LER CAPI-Baffle plate. 2-Elements. 3-Gaskets.

4-Capscrew .

•

FUEL SYSTEM

The fuel flows from the Diesel fuel tank through the fuel line (5) to thefuel transfer pump (4). The fuel transfer pump supplies the fuel underpressure to the fuel filter (3), the filters remove the dirt and other foreign

FUEL SYSTEMI-Fuel injection lines. 2-Fuel injectionpumps. 3-Fuel filter. 4-Fuel transfer

pump. 5-Diesel fuel tank line.

•

particles. From here the fuel is supplied to the fuel pump manifold forthe individual fuel injection pumps (2). The fuel injection pumps meterand force the fuel through the fuel injection lines (I) and the fuel injectionvalves in the cylinder head, into the pre-combustion chamber where it isignited and passed into the main combustion chamber or cylinder.


CARE OF THE FUEL FILTER

Draining Fuel Filter Housing: Every 60 hours, drain the filter housingof sediment and water which settles to the bottom of the compartment.Close the Diesel fuel line valve located under the right seat cushion,

•

DRAINING FUEL FILTERHOUSING

I-Upper vent. 2-Lower vent.3-Drain plug .

remove the filter housing drain plug (3) and open the lower vent (2) andthen the upper vent (1) in the housing. Replace the drain plug, and primethe system. See the topic, PRIMINGTHEFUELSYSTEM.

FUEL LINE VALVE

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Fuel Filter Elements: When the absorbent filter elements have collectedenough contamination to interfere with engine performance, they must bereplaced with new elements. These elements will continue to absorbparticles until fuel will no longer flow through them at a rate to maintainmaximum engine performance. They will not discharge their burden intothe clean fuel; this is prevented by the fine grade filter paper at the core.


Because these filter elements absorb and hold contaminants, theycannot be washed or otherwise restored.

As the filters gradually become clogged with foreign mctericl, theposition of the fuel gauge indicator will work back from the originalposition in the NORMAL(white) range, to the CAUTION (green) range,and later into the OUT (red) range. When the indicator shows in theOUT (red) range the filters should be changed and all new filter elementsinstalled - never only one.

FUEL PRESSURE GAUGE

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Removing Used Filter Elements: Thoroughly clean the top of the filtercover and around the edges of the gasket joint between the filter bodyand cover, to guard against loose dirt dropping into the filter housingwhen the cover is removed. Close the Diesel fuel tank valve, remove thefilter housing drain plug, open the lower and then the upper filter housing vents.

REMOVING FUEL FILTERASSEMBLY

REMOVING FILTER ELEMENTI-Pin. 2-Retainer rod. 3-Retainer.4-Filter element plate. 5-Spring.

6-Filter element.


Remove the cover, and lift the assembly of filter element plate and allfilter elements out of the housing.To remove the used filter elements, set the assembly on a flat surface

and compress each spring (5) until the retainer (3) will permit removalof the pin (1). Lift off the filter element plate (4) and remove the usedelements (6) from the retainer rods (2).

Attaching New Filter Elements To Filter Element Plate: Thoroughlywash the plate, retainer rods, retainers, pins, and springs in cleankerosene, Diesel fuel or a non-inflammable cleaning fluid. Make surethat the hands are clean before attempting to install the new parts. Placethe retainer rods into each new filter element and attach to the plateindividually by compressing the spring and inserting the pin so that it isheld securely in the counterbore of the retainer. Grasp each element atthe bottom end and give it approximately a half turn under light pressureto seat the ends of the element against the plate and against the disc onthe bottom of the retainer rod. Keep the elements parallel and squarewith the plate while performing this operation.

Installing Filter Elements In Housing: Exercise extreme care to seethat the top side of the retainer plate, retainer assembly, and the insideof the housing cover are clean. These parts are on the clean side of theelements and if dirt is not completely removed, it will find its way intothe fuel injection equipment. To install the elements in the housing proceed as follows:

1. Flush out the housing with clean fuel and replace the drain plug.

2. Install a new gasket on the housing.

3. Fill the housing approximately half full with clean fuel, so that aminimumof cranking is required to prime the system.

4. Install the elements and plate in the housing.

5. Install a new gasket on the plate.

6. Replace the cover and follow the instructions given in the topic,PRIMINGTHE FUELSYSTEM.

Keep New Filter Elements On Hand: An extra set of filter elementsshould be kept on hand for replacement. Always keep the elementswrapped in their original cartons to insure against dust and dirt accumulation which will shorten the life of the elements if it gets on the outside ormay cause damage to the fuel injection equipment if it gets on the inside.

PRIMING THE FUEL SYSTEMAny time the fuel flow is broken and air is allowed to get into the fuel

system, the fuel system must be primed. If air is left in the lines, thefuel system may become air bound, resulting in inability to start theDiesel engine or the mis-firingof one or more cylinders.


To Prime the Fuel System: Check to see that the Diesel fuel tank valveis open, and open the fuel filter vent valves and the vents on the fuelinjection pumps. Then, start the starting engine, engage the starter pinion, and the starting engine clutch. Allowthe starting engine to crank theDiesel engine at idle speed, with the compression release lever in theSTARTposition, so that the fuel transfer pump will force the air and fuelthrough the fuel filters and into the fuel pumps. The governor controllever should be in the OFF position. When the flow of fuel through thevents becomes continuous and contains no air bubbles, close the vents.Open and close the vents several times in succession to be sure all theair is bled fromthe system.

FUEL FU.TER VENT VALVES FUEL INJECTION PUMP VENTS

FUEL INJECTION EQUIPMENT

When improper fuel injection is affecting the Diesel engine operation,a systematic check should be made to determine the cause. The mostlikely cause is dirt or water in the fuel. Drain the sediment from theDiesel fuel tank and drain the fuel filter housing. Check the fuel pressuregauge as mentioned in the topic, CAREOF THEFUELFILTER.Replacethe absorbent filters if necessary. Then prime the fuel system until cleanfuel passes through the vents on the fuel injection pumps. If the fuel system is air bound, priming the system will overcome the difficulty.

When the engine is running irregularly, and smoking, a fuel injectionvalve may be spraying the fuel improperly.

As the clearance between the plunger and the barrel of a fuel injectionpump increases, due to wear, fuel leakage occurs. When the leakageincreases to the point where insufficient fuel is injected into the cylinder,a loss of power is noticeable. With the loss of power, hard starting is alsoencountered.


Fuel Injection Valves

Testing Fuel Injection Valves: Whenever an engine performs in sucha manner that a fuel injection valve is suspected of causing trouble, testall fuel injection valves. To test the injection valves, loosen the fuel injection line nuts at the fuel injection pumps, one at a time, while theengine is running. When a nut is loosened and the exhaust smoking iscompletely or partially eliminated and the irregularity in running is notaffected, this identifies the defective valve and a new one should be installed in that cylinder. Remove the fuel injection valve and test it forspray characteristics as instructed in the following paragraphs. A defective valve should be replaced. Be sure that the fuel injection pumpshave been installed correctly. See the topic, INSTALLINGFUELINJECTION PUMPS.Further checking, if required, should be done by your"Caterpillar" dealer.

Removing Fuel Injection Valves: Valves can be checked for producingproper spray characteristics. After cleaning all dirt from around thevalves, using the brush supplied in the tool equipment, disconnect thefuel injection lines and injection valve overflow line from the valves.Immediately cap and plug the openings with the seal (1), covers (2) andplug (3) as shown. Unscrew the retaining nuts that hold each valve inplace.

INJECTION VALVE REMOVEDI-Seal. 2-Cover for fuel injection valve.

3-Plug for fuel injection line .

•

Checking Injection Valve Spray Characteristics: Remove the valves,turn them upside down and connect the injection lines. Disconnect andplug the overflowline at the overflowline connection or the overflowlineconnection at the transfer pump. Start the starting engine and engage


the starter pinion and clutch. Allow the starting engine to turn the Dieselengine at low idle speed. Move the governor control lever to full governed speed position and notice the fuel spray that comes from the fuelinjection valves.

CHECKING INJECTION VALVESPRAY CHARACTERISTICS

LOCATIONS FOR PLUG IN DRAINLINE OR TRANSFER PUMP

If the fuel injection valves give a fine, even spray, it can be assumedthat they are in good condition. On the other hand, a fuel injection valveshould be replaced if it exhibits any of the followingcharacteristics:

Fuel discharged in a solid stream or jet.

Fuel spray emitted all on one side of the nozzle.

Cut-offat the end of the fuel discharge is sluggish or erratic.

Severe dribble from the nozzle, expressed by large drops ofoil wetting the cone nut on the bottom side of the nozzle.

In checking fuel injection valves, remember that the quantity of thefuel is determined by the condition of the fuel injection pump and thequality of the spray characteristic is determined by the condition of thefuel injection valve. Occasionally, however, a single fuel injection valvemay be affected by dirty fuel and require replacement, while the othervalves in the engine are satisfactory.

Installing Fuel Injection Valves: When installing fuel injection valves,the retaining nuts should be drawn down evenly and only tight enoughto prevent leaks between the valves and the valve seats. When attachingthe overflow line to the top of the injection valve be sure to place a washer above and below the fitting. Tighten the screw moderately.


LOCATION FOR WASHERS ONINJECTION VALVE DRAIN

LINE

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Fuel Injection Pumps

Testing Fuel Injection Pumps: It is not usual for one pump on an engine to require replacement unless all the pumps are worn. Worn fuel injection pumps will result in loss of power and hard starting. When lossof power and hard starting is accompanied with a clear exhaust, goodcompression and no blow-by gases from the crankcase breather it indicates worn injection pumps. These pumps can be checked by your "Caterpillar" dealer.

Removing Fuel Injection Pumps: Every precaution should be taken toprevent dirt from getting into the fuel injection pumps or housing. Usethe brush supplied in the tool equipment to clean the top of the housingand around the inspection plate before removing. When fuel injectionpumps are removed the pump plungers must not be taken from thebarrels as any dust or dirt will score these finelyfinishedparts.

After cleaning the top of the housing, and around the inspection plate,remove the fuel injection lines from the pumps and immediately cap andplug the opening with covers (2) and plugs (1) provided in the toolequipment. Remove the inspection plate. Remove the fork (3) that fastensthe rack to the slide bar. Remove the two capscrews and plates thathold the rack in place and pull the rack out of the housing.

Remove the capscrews and clamps that hold the fuel injection pumpto the housing and lift the pump straight up only enough to clear thedowel pins (5). Then insert a finger through the inspection hole to holdthe plunger from,dropping out and shift the pump to one side so the endof the pump plunger will free itself from the slot (7) in the lifter; then remove the pump. Place the ferrule cap seal (6) and stopper (4) furnishedin the tool equipment over the fuel outlet of the fuel housing and in theinlet of the pump to keep out dirt.


REMOVING RACK FORK

I-Fuel line plug. 2-Pump cover.3-Fork.

•

Should the plunger accidentally be removed from the pump barrel,take every precaution to avoid nicking or scratching it since the slightestrough spot will cause undue wear in the barrel and shorten the life of

REMOVING FUEL INJECTION PUMP

4-Stopper. S-Dowel pins. 6-Ferrulecap seal. 7-Slot in lifter .

•

the pump. The plunger should be rinsed in clean fuel before putting itback in the barrel. Be sure the plunger is replaced in the barrel fromwhich it was withdrawn. Each fuel injection pump assembly (plungerand barrel) is machined as a unit and finished to such exact limits thatit must be used, removed, and installed as a unit.

Installing Fuel Injection Pumps: Lower the pump and plunger into thehousing, taking care that the pump plunger does not slide out of thepump. Slide the end of the plunger into the slot in the lifter. Lower thepump onto the dowel pins and fasten in place.

Turn the gears on the pump plungers until the marked tooth of eachgear faces outward toward the pump rack. Replace the pump rack, engaging the marked teeth (9) of the pump plunger gears with the marks


(10) on the rack. The end and two center pump gears can be aligned withthe marks (8) on the fuel pump housing. The other two pump gears canbe aligned quite easily as the rack is slid into position, it is advisable topull the rack out part way to see that the marks are correctly aligned.

INSTALLING PUMP RACK

a-Marks on housing. 9-Marked teethall gears. IO-Marks on rack .

•

Install the capscrews and plates which hold the rack in place. Move thegovernor control lever to the full engine speed position and fasten thefork in place. Replace the inspection cover and connect the fuel lines.

STARTING ENGINE FUEL SYSTEMCarburetor Adjustment: To obtain an approximate adjustment, turn

the high speed adjusting screw one and one-half turns from the closedposition. Turn the idling speed adjusting screw one and three-eighthsturns fromthe closed position.

A more accurate adjustment can be made with the engine running.Lockthe governor shaft lever in the idling position by dropping the idlinglatch in front of the lever. Start the engine and allow it to warm up. Turn

CARBURETOR ADJUSTMENTS

I-Idling speed screw. 2-Idling speedcontrol screw. 3-High speed screw.

•


the idling adjusting screw (1) until the engine idles evenly without emitting black smoke from the exhaust. Liftthe idling latch and let the enginerun at full governed speed. Turn the high speed adjusting screw (3) untilthe engine runs evenly without surging and does not emit black smokefrom the exhaust. Turn the idling speed control screw (2) to the left (out)to decrease the idling speed or to the right (in) to increase it.

Sediment Bowl Filter and Fuel Line Screen: The sediment bowl collectswater and sediment that may be in the fuel. To remove the collectedwater and sediment, close the valve (1) and remove the bowl by unscrewing the nut that clamps it to the body of the valve. Unscrew theedge-type filter (2) and shake it in kerosene or some non-inflammablecleaning fluid. When the bowl is replaced see that the gasket is clean,is in the correct position, and is not broken.

STARTING ENGINE SEDIMENTBOWL FILTER

I-Fuel shut-off valve.2-Edge-type filter .

•

The fuel line screen in the carburetor should be removed and cleanedwhenever the sediment bowl is serviced. This is done by loosening thenut (7) that holds the fuel line (6) into the body fitting (8). Remove the

REMOVING FUEL UNE SCREEN

3-Screen. 4-Stud. 5-Body assembly.6-Fuel line. 7-Nut. B-Body fitting .

•


capscrew that holds the body assembly (5) in place over the screen(3) and stud (4). Turn the body assembly off the stud and screen, thenslide the screen offthe stud.

Occasionally remove the drain filter on the starting engine inlet manifold and inspect the filter element. If it is deteriorated, replace it.

COOLING SYSTEM

Coolants: Water used in the cooling system should be soft, or as freeas possible from scale forming minerals. If it is impossible to obtain softwater it is advisable to treat the available water with "Caterpillar" RustInhibitor. The use of this rust inhibitor in the cooling system will preventthe formation of rust. It will also retard, and in some cases completelyeliminate mineral deposits within the engine. Mostcommercial anti-freezesolutions contain rust inhibitors, therefore, it is not necessary to use rustinhibitor with those anti-freeze solutions which do contain rust inhibitor.Your "Caterpillar" dealer stocks "Caterpillar" Rust Inhibitor in convenient one quart cans. Directions for its use are printed on each can.

When the temperature is below freezing sufficientanti-freeze should beused in the cooling system to prevent freezing. Various anti-freeze mixtures such as ethylene glycol (Prestone, G. M., Permaguard, Zerex, etc.)denatured ethyl alcohol, methanol (synthetic wood or methyl alcohol)and glycerine are all suitable for use. Alcohol can be used successfullybut, because it readily evaporates at the normal operating temperatureof the Diesel engine the solution should be tested frequently - evendaily - and kept up to correct strength. This loss by evaporation is objectionable but the temperature regulator should not be removed. Doingso might make the solution run cooler and save the alcohol, but is notdesirable for good performance. It is essential, therefore, that the coolantbe tested frequently to assure adequate protection.

Filling: Fill the starting and Diesel engine cooling system by pouringthe coolant into the radiator filleropening.

Draining: The cooling system is drained by opening the valve on theradiator water outlet on the left side and by removing the Diesel cylinderblock drain plug at the rear of the water manifold on the same side ofthe Diesel engine. This should be done at the end of the day's run whenall the material is in suspension and will drain with the liquid.


RADIATOR DRAIN VALVE CYLINDER BLOCK DRAIN PLUG

If draining is being done for the purpose of cleaning sediment fromthe system, the plate at the rear of the starting engine cylinder blockshould be removed so that the sediment can be cleaned out of the waterjacket. During the time the starting engine is not running the velocity ofthe water around its cylinder block is low allowing the sediment in thewater to settle.

Cleaning The Radiator: Dirt in between the tubes of the radiator andoil cooler may cause excessively high operating temperatures. This dirtmay be easily removed by removing the capscrews which hold the perforated guards in place. Then wash, brush or blow the dirt out withwhichever method is available and most effective.

Cleaning The Cooling System: The cooling system should be drainedoccasionally to remove dirt and sediment which accumulates. The draining should be done at the end of the day's run, when the foreignmaterialis in suspension and will easily drain with the liquid.

The cooling system should be washed out occasionally. To do this, runthe engine until the liquid in the cooling system is at operating temperature, and the loose foreign material is stirred up. Then stop the engineand drain as quickly as possible before the sediment has time to settle.Close the drain and pour in kerosene equal to about one-tenth the capacity of the cooling system and fill the remainder with a solution of onehalf pound (226.8grams) of washing soda to each gallon (3.8liters or .8Imp. Gal.) of water. Run the engine for about one-half hour, and againdrain and flush the system with clean water.


In more obstinate cases, if the above treatment does not prove effective,an acid solution may be used; but acid must be used with extreme care,and only after other means have proven ineffective.Immediately after thesystem has been washed with the soda solution described, fill the cooling system with a solution of five parts hydrochloric (commercialmuriatic) acid, one part formaldehyde and forty-eightparts water and allow itto remain in the system for a few hours at operating temperature. Theformaldehyde should first be mixed with the water, then the acid addedto the solution. Drain immediately after stopping the engine and thoroughly flush the system with clean water to which has been added ahandful ofwashing soda, which acts as a neutralizing agent.

After using the acid treatment, the cooling system should be drainedand flushed with clean water the second time at the end of the day's run.

CAUTION

The acid solution is also a solvent of the metals of whichradiators are made. Therefore,great care must be exercisedto avoid continuing the operation beyond the point wherethe scale is dissolved. It is highly important that no trace ofthe acid be left in the coolingsystem.

RADIATOR SEALED PRESSURE OVERFLOW UNIT

The sealed pressure overflow unit should be cleaned periodically toremove lime deposits and other accumulations which might hold thevalve in the "open" position. Such deposits are not so noticeable whereinhibitors are used in the cooling system, but, even so, regular cleaningof the unit should be encouraged.

To clean the unit, remove the hood, and disassemble the unit by removing the screws which hold the cover in position. Lift off the cover,then remove the seal assembly and brush the parts thoroughly until allof the foreign matter has been removed. Caution: Donot wash the unit inany kind of cleaning solution because so doing may damage the seal.

FAN BELT ADJUSTMENT

If the fan belts are operated too loose, they will slap against the pulleys, causing unnecessary wear to the belts and possibly slipping to theextent that the engine will overheat. If the belts are too tight, unnecessary stresses are placed upon the fan bearings and belts, which mightshorten the life of both. Correct adjustment exists when the belts can bepushed inward approximately 11/2 inches (3.81cm.) as shown at (I).

When a belt (or belts) need replacing, a matched set which is available from your "Caterpillar" dealer should be used. Always install amatched set - never onlyone.


CHECKING FAN BELT TENSION

I-Correct adjustment allows approximately 1112 inch (3.81cm.) slack

at this point.

•

Adjusting Belts: Loosen the three retaining nuts (2) which hold the fanhub bracket to the timing gear cover. Loosen the lock nut on the adjusting screw (1) and turn the screw until the belts can be pushed inwardapproximately Ph inches (3.81cm.). Recheck the adjustment after tightening the locknut and bracket retaining nuts.

FAN BELT ADJUSTMENT

I-Adjusting screw. 2-Retaining nuts .

•

VALVE CLEARANCE ADJUSTMENT

The initial valve clearance adjustment should be made after the first240hours of operation. Thereafter, the clearance should be checked andadjusted ifnecessary after every 480hour operating interval.

The valve clearance adjustment should be made while the engine ishot, either while the engine is running or before it has been stoppedtwenty minutes after having run long enough to thoroughly warm up.If the adjustment is made with the engine stopped and is not completedduring this twenty minute interval, start the engine and allow it to warmup. The valve clearance adjustment and the compression release clear-


ance adjustment must be made, or the clearances checked, with thecompression release lever in the RUNposition.To Adjust: Loosen the valve adjusting screw lock nut (2), turn the ad

justing screw (3) to allow the thickness gauge (1) to pass between thetop of the valve sleeve and the end of the valve rocker at the correctclearance. Set the clearance for the inlet and exhaust valves at .016inch(.41mm.). Tighten the adjusting screw lock nut and check the adjustment.If adjustment is made with the engine stopped, turn the engine until

the valve closes and the push rod is at its lowest point.After adjusting the clearance on the valves, and while the compression

release lever is still in the RUNposition, with the engine stopped, checkthe clearance between the upper end of the compression release push rodand the end of the valve rocker. This clearance should be .025to .030inch(0.64 to 0.76mm.). To adjust, loosen the adjusting screw lock nut (5) on

VALVE CLEARANCE ADJUSTMENTI-Thickness gauge. 2-Lock nut.

3-Adjusting screw.

COMPRESSION RELEASE PUSHROD ADJUSTMENT

4-Adjusting nut. 5-Lock nut.

the compression release push rod and turn the adjusting nut (4) until thecorrect clearance is obtained. If the compression release push rod turnswhen adjusting, hold the push rod with a wrench on the two flat surfacesbelow the lock nut. Recheck the adjustment after the the lock nut is tightened. Check this clearance every time the valve clearance is changedor checked.

Check Valve Rotators: Check the valve rotators with the engine running, after the valve clearance adjustment check has been made, to seeif the valves rotate. The rotating of valves decreases carbon build up anduneven wear, thereby increasing the life of the valves. To check therotation of the valves, observe the lines on the spring retainer throughone of the three holes in the valve sleeve. If the valves do not turn thevalve rotators should be replaced. See your "Caterpillar" dealer.


STARTING ENGINE VALVE CLEARANCE ADJUSTMENTThe valve clearance adjustment should be made when the engine is

hot. To adjust, crank the engine until the valve closes and the valvelifter is at its lowest position.Turn the adjusting screw (2) while holding the valve lifter (4) until

there is .008inch (0.2mm.) clearance at (1) between the adjusting screwand the end of the valve stem. Check this clearance with a thicknessgauge (3).

STARTING ENGINE VALVE CLEARANCEADJUSTMENT

I-There should be .008 inch (.2 mm.)clearance at this point. 2-Adjustingscrew. 3-Thickness gauge. 4-Valve

lifter.

•

SPARK PLUG ADJUSTMENTThe spark plugs should be examined often enough so the gap may be

kept at approximately .025 inch (0.64 mm.). Measure this gap with athickness gauge. To adjust the gap, bend the outer electrode.

STARTING ENGINE SPARK PLUG ADJUSTMENT

STARTING ENGINE MAGNETODo Not Lubricate the Magneto at Any Point: The bearings are packed

with a ball and roller bearing grease when assembled, and this should


be replaced only when the magneto is taken to your "Caterpillar" dealerfor checking or reconditioning.

Checking Contact Point Opening: Every 1,200hours check the contactpoint opening.

CHECKING CONTACT POINTOPENING

I-Contact point bumper block on oneof the highest elevations

of the cam.

ADJUSTING CONTACT POINTOPENING

2-Bracket fastening screws.3-Eccentric slotted screw.

To check, first remove the distributor plate which is held in place byfour screws. Care should be taken in removing the plate not to damagethe gasket. Clean any carbon dust from inside the plate by using a softcloth dampened with a non-inflammable cleaning fluid. Remove the distributor rotor, then turn the engine until the contact point bumper block(1) is on one of the highest elevations of the cam. Check the clearancewith a thickness gauge between the contact points as illustrated. Thisclearance should be .014to .018inch (.36to .46mm.).

Adjusting Contact Point Opening: Loosen the screws (2) which holdthe adjustable contact point bracket and move the bracket by insertinga screwdriver in the eccentric slotted head screw (3) and turn eitherclockwise or counterclockwise until the correct point opening is obtained.Then tighten the fastening screws and recheck the adjustment.

Testing: A magneto may be tested when coupled to the engine byturning the switch, ON, removing the cable from a spark plug, and holding the terminal l/s inch (3.17mm.) away from the metal base of the plugwhile cranking the engine. If no spark passes from the terminal to themetal base, disconnect the magneto switch wire from the magneto whereit is connected to the terminal on the top of the magneto housing andtest again. If a spark passes from the terminal to the base with the switchwire removed, the wire running from the magneto to the switch has be-


come grounded or the switch requires replacement. If, with the switchwire off, the magneto still does not fire, remove the magneto as instructedin the next paragraph and take it to your "Caterpillar" dealer for testing.

To Remove the Magneto for Testing: Disconnect the cables from themagneto. One of the cables should be tagged or marked in some convenient manner which will designate the proper position of these cables.Remove the two capscrews that hold the magneto to the timing gearcover and liftoff the magneto.

To Time the Magneto to the Engine: Check the adjustment of the contact points. Locate the firing point of No. I cylinder by removing the

STARTING ENGINE FLYWHEEL ANDHOUSING TIMING MARKSI-Timing mark on housing.

2-Mark on flywheel .

•

cover from the side of the starting engine clutch housing and the sparkplug fromNo. I cylinder. Crank the engine slowly until air is forced fromthe spark plug opening. This indicates the piston is coming up on thecompression stroke. Continue to turn the crank until the "M" mark or"MAG"mark (2) on the flywheel is even with the mark (1) on the hous-

TIMING MARKSI-Timing marks on coupling. 2-Arrow.

3-Timing mark on housing .

•


ing. The crank on No. I cylinder is now 25° ahead of top center on thecompression stroke which is the correct firingpoint.Remove the distributor plate from the magneto and rotate the impulse

coupling in the opposite direction from drive (this will prevent the impulse coupling weights catching). Drive direction is indicated by anarrow (2) on the top of the magneto housing. Continue to turn the coupling until the red mark (1) on the coupling lines up with the red mark (3)

ROTOR POSITION TO TIMEMAGNETO TO ENGINE

4-Rotor-contact .

•

on the housing and the distributor rotor contact (4) is in the position asshown. The contact points should be just beginning to open, with thecoupling rotating in the driven direction.Replace the distributor plq:teand install the magneto on the engine.

STARTING ENGINE CLUTCHTo Test The Adjustment: Pull the clutch lever to the engaged position.

The lever should go into this position with a distinct snap, and shouldrequire a reasonably hard pull.

STARTING ENGINE CLUTCHADJUSTMENT

I-Lock pin. 2-Adiusting collar.

•


To Adjust: Remove the plate from the side of the clutch compartment.Turn the clutch adjusting collar (2) until the lock pin (1) is accessible.Pull the lock pin out and turn the collar to the right until the lock pindrops into the next hole.Test the adjustment by engaging the clutch. If one hole gives a slightly

loose adjustment and the next gives too tight an adjustment, use thelooser adjustment.Draining The Starting Engine Clutch Housing: The starting engine

clutch is designed to operate in a dry compartment. Remove the drainplug every 60hours to drain any lubricant which may have accumulated.Install the plug to keep out dirt and moisture.

STARTING ENGINE CLUTCHHOUSING DRAIN PLUG

•

FLYWHEEL CLUTCH

The proper initial clutch adjustment will give a clutch lever pull between 120 and 130 pounds. This measurement is made with a springscale placed at the bottom of the handle on the clutch control lever withthe engine stopped, and when the engine is cold. Slightly higher poundspull may be required when the clutch is warm.The clutch is equipped with a hydraulic actuating mechanism so lever

pull c~not readily be used to determine when the clutch should beadjusted. The clutch should be adjusted immediately when it begins toslip, however when the clutch is properly adjusted the lever should gointo engaged positionwith a distinct snap.To Adjust: When clutch adjustment becomes necessary proceed as

follows:1. Remove the floor plate inspection cover. Care should be exercised

to clean any dust or dirt from the top and around the edges of theclutch compartment cover (1). Be sure all tools used to make theadjustment are clean. Remove the cover being careful not to damagethe gasket under the cover.


CLUTCH ADJUSTMENTI-Clutch compartment cover.

ADJUSTING CLUTCH2-Lock nuts. 3-Adiusting ring.

2. Turn flywheel until one of the adjustment lock nuts (2) is accessible.Loosen lock nut about two turns. Tap plate slightly to be sure it isfree on stud. Rotate flywheel 1800 and loosen the other lock nut insame manner.

3. Turn the adjusting ring (3) clockwise approximately three inches totighten.

4. Tighten the lock nuts to a torque of approximately 80 pounds feet.This can be accomplished with a steady pull on the end of the %inch box wrench supplied in the tool equipment.

5. Check to see that the clutch compartment cover is clean and thegasket is in good condition, then install the cover.

Flywheel Clutch Brake: The tractor is equipped with a clutch brake,which stops the clutch from turning, and permits shifting gears withoutclashing. To apply the brake, press the flywheel clutch control lever forward as far as it will go. If the clutch is slow in stopping, the clutch brakeshould be adjusted.

To Adjust: If the brake lining has become worn to the extent that whenapplied it will not stop the clutch from turning, make both adjustmentsin the followingmanner:

1. Engage the clutch.

2. Loosen the lock nut on adjusting screw (4) and turn the adjustingscrew in (clockwise)all the way.

3. Loosen the lock nut on adjusting screw (2) and turn the adjustingscrew in (clockwise) until there is clearance between the brake re-


•

FLYWHEEL CLUTCH BRAKEADJUSTMENT

I-Brake release lever. 2-Adjusting screw.3-Brake actuating lever. 4-Adjusting

screw .

lease lever (1) and the brake actuating lever (3). This clearanceshould exist when pushing the brake actuating lever (3) toward thebrake release lever (1) as far as possible to place the brake liningagainst the brake drum.

4. Turn the adjusting screw (2) out (counterclockwise) until the brakerelease lever (1) just touches the brake actuating lever (3), then turnthe adjusting screw (2) out (counterclockwise) one-half turn more,and tighten the locknut.

5. Disengage the clutch and push the control lever to the extreme forward position, then release the control lever.

6. With the brake actuating lever (3) held against the brake releaselever (1) turn the adjusting screw (4) out (counterclockwise) until ittouches the brake actuating lever (3) and tighten the lock nut.

CAUTIONIf brake is adjusted too tight the brake will be applied be-

fore the clutch is fully disengaged and difficultshifting andexcessive clutch brake liningwear will result.

STEERING CLUTCHES AND BRAKESThe steering clutches should be kept in proper adjustment to insure

full engagement of the clutches when the control levers are in the freeforward position. Obstructions such as rocks, sticks and the like shouldbe removed which hinder the control levers traveling to the free forwardposition. If the tractor is operated with improper steering clutch adjustment or with obstructions to the control levers the release bearings maybecome damaged.

Steering ClutchesParticular attention should be given to each step of checking and ad

justment of the steering clutches to obtain maximum service life of theclutches.

Checking Adjustment: The steering clutch adjustment should bechecked every 120hours as follows:


CHECKING CLEARANCE BETWEENADJUSTING NUT AND RELEASE

YOKE3-Locknut. 4-Adjusting nut. 5-Release

yoke.

1. Loosen the clamp nut (2) and remove the inspection cover (1).

INSPECTION COVER REMOVALI-Inspection cover. 2-Clamp nut.

2. Check to see that there is clearance between the adjusting nut (4)and the release yoke (5) by moving the yoke by hand toward oneside and the other side of the tractor.

3. Pull the control lever approximately half way back as shown at (6)and allow it to return very gradually toward the free forward position. If the control lever returns to the free forward position witha slight hesitation and almost stops at (7) the steering clutch needsno adjustment.

4. Install the inspection cover and seat cushion if no adjustment isneeded.

STEERING CLUTCH CONTROL LEVERPOSITIONS

6-HaU-way back position. 7-Point ofslight hesitation .

•

Adjustment: When the control levers do not return properly to the freeforward position or there is no clearance between the adjusting nut andyoke, adjust the steering clutches as follows:


1. Loosen the locknut (3) which locks the adjusting nut (4).

2. Turn the adjusting nut (counterclockwise) away from the releaseyoke (5) until the control lever will remain approximately half wayback when pulled to that position.

3. Push the control lever to the free forward position.

4. Turn the adjusting nut (4) in (clockwise), 1/6 turn toward the release yoke.

S. Pull the control lever to half way back position (6) and allow it toreturn very gradually to the free forward position.

6. If the control lever does not return to the free forward position byitself, repeat Steps 3, 4 and S until it does return with a slight hesitation and almost stops at a point shown at (7).

7. Tighten the locknut (3) without changing the adjustment. Make thesame adjustment to the other clutch and replace covers.

Steering Clutch Booster SpringCheck the Steering Clutch Booster Spring Adjustment: The booster

spring adjustment should be checked after the steering clutches havebeen adjusted.

1. Pull the control lever all the way back.

If the control lever returns to the free forward position the boosterspring adjustment is correct.

If the control lever remains in the all the way back position, adjust thebooster spring.

Adjust the Booster Spring: To adjust the booster spring proceed asfollows:

1. Loosen the locknut (l).

•

STEERING CLUTCH BOOSTERSPRING ADJUSTMENT

I-Locknut. 2-Adjusting nut .


2. Turn the adjusting nut (2) out (counterclockwise) until the controllever returns to the free forward position.

3. Tighten the locknut.WARNING

When making the adjustment, do not stand in front of thecontrol lever.

As the steering clutches become sufficiently worn through service toprevent restoring proper control adjustment, consult your "Caterpillar"dealer.Steering Clutch Release Bearing Yoke Equalizer Bar

After the steering clutch control lever free movement adjustment hasbeen made as described in the preceding paragraphs, the adjustment ofthe release bearing yoke equalizer bar should be checked either throughthe top openings on the transmission top cover or through the openingson the back of the transmission case.

Check The Release Bearing Yoke Equalizer Bar Adjustment: As theclutch facings wear, the clearance between the release bearing yokeand pressure plate hub assembly decreases. When this clearance hasdecreased to approximately 3/32 inch (0.238cm.), adjust the position ofthe release bearing yoke equalizer bar (5) to provide approximately lizinch 0.27 cm.) clearance between the yoke and pressure plate hubassembly.Adjustment: To make the adjustment, loosen the clamp bolt nut (4) on

the end of the clamp bolt (1), enough to allow the serrations on the bushing (3) to jump the serrations on the washer assembly (2). The nut (4) islocated on the bottom of the steering clutch case and over the diagonalbrace of the track roller frame.

EQUALIZER BAR ADJUSTMENTl-Clamp bolt. 2-Equalizer bar. 3-Bushing. 4-Clamp bolt nut.

S-Washer assembly.


Slide the equalizer bar (5) toward the outside of the tractor by movingthe upper end of the yoke toward the center of the tractor enough toestablish the clearance of approximately liz inch (1.27cm.) between theyoke and pressure plate hub assembly.

Tighten the clamp bolt nut and then readjust the steering clutch forcontrol lever free movement.

As the limit of adjustment at the top and bottom of the release yokeis approached, consult your "Caterpillar" dealer regarding further adjustment or relining the steering clutches.

Steering Clutch Brakes

Checking Adjustment: Keep the brakes adjusted just tight enough sothe tractor will turn correctly when the steering clutch is released and thebrake pedal is depressed about 6 inches (15.24cm.).

Adjustment: If adjustment becomes necessary proceed as follows:

1. Remove the covers on top of the transmission case cover.

2: Turn the head of the adjusting screw in a clockwise direction (lizturn at a time) to tighten the brakes. Tighten the brakes until thereis 6 inches (15.24cm.) movement when the brake pedal is depressedfrom the released position to the applied position. Replace the covers.

3. Loosen the lock nut on the support screw on the under side of thetransmission case below the brake drum.

4. Turn the support screw up tight against the band and then back offll/z turns and tighten the locknut.

5. This screw supports the brake band and maintains the correct clearance between the lining and the drum. The band should be entirelyfree from the drum when the pedal is in the released position. Inorder to maintain a smooth brake action, care should be exercised

STEERING CLUTCH BRAKEADJUSTING SCREW

BRAKE SUPPORT SCREW


to keep them properly adjusted at all times. Excessive loosenessdeveloping in the brake mechanism may cause kick back of thepedals during operation.

The brake pedals are adjustable for length and angle. Loosen the nuton the eyebolt and move the pedal pad to the desired position. Thentighten the nut on the eyebolt.

STEERING CLUTCH BRAKEPEDAL ADJUSTMENT

STEERING CLUTCHCOMPARTMENT DRAIN PLUGS

Draining Steering Clutch CompartmentThe steering clutches are designed to operate dry. Lubricant is used

only to lubricate the release bearings. This lubricant, and any seepagefrom the adjoining compartments should be drained every sixty hours ofoperation by removing the plugs in the bottom of the case. Failure to observe proper draining periods may result in the clutches slipping or difficulty in steering the tractor. The drain plugs should be replaced to keepout dirt and moisture during operation.

Washing The Steering Clutch BrakesIf the steering clutch compartmenfshave not been drained at the prope-r

interval or lubricant has accumulated on the steering clutch brakes sufficiently to cause slippage or difficultsteering, some improvement in operation will result by washing the brakes. To do this, drain the compartments, replace the drain plugs, then remove the brake band inspectioncovers and pour enough non-inflammable cleaning fluid into each compartment so that the bottom of each steering clutch brake drum will dipin the fluid. Opercta the tractor back and forth for five minutes withoutreleasing the steering clutches. This will prevent the oil and dirt on theoutside of the clutches and the inside of the cases frombeing washed inbetween the clutch discs. Drain the clutch compartment and repeat theoperation of washing, this time applying 'the brakes occasionally. Drainthe clutch compartments, replace the drain plugs and lubricate the steering clutch release bearings.


TRACK ADJUSTMENTThe track adjustment is correct when the track can be raised from lliz

to 2 inches (3.8 to 5.1 em.) above the track carrier roller as shown at (1).

CHECKING TRACK ADJUSTMENTI-There should be 1112to 2 inches (3.8 to 5.1 cm.) clearance at this point.

When track adjustment becomes necessary proceed as follows:

1. Remove the cover in front of the sprocket.

2. Loosen the clamp nuts holding the adjusting nut cap (3), and lockingcollar (2).

3. Turn the adjusting nut (4) until the track is at the correct adjustment.

When the adjustment has been made, drive the tractor backward andforward to equalize the adjustment, then recheck the adjustment. Tightenthe clamp riuts and replace the cover.

ADJUSTING TRACK2-Locking collar. 3-Adjusting nut cap. 4-Adjusting nut.

S-This measurement should not exceed 8lfa inches (20.6 cm.).


As continued track adjustment becomes necessary through service, thefollowing precaution should be observed to prevent the adjusting boltbeing screwed out of the large adjusting nut, with subsequent damageto the threads. A maximum measurement of 81/s inches (20.6 cm.) asshown at (5) should not be exceeded between the adjacent faces of theadjusting nut cap and the pilot that holds the recoil spring.

The tractor is equipped with a two-position idler. The high positionbeing for drawbar work and the low position for front mounted work.The idler will be set in the low position when leaving the factory unlessotherwise specified. For further information,see your "Caterpillar" dealer.Proper care of the tracks, especially when operating the machine under

adverse conditions, will greatly extend their service life.After operating in mud or slush and below freezing temperatures are

anticipated, park the machine on solid dry ground, planks, logs or brushto prevent the machine from freezing to the ground. Snow or mud shouldalso be cleaned fromaround the track links, sprockets, idlers, rollers, andguards to prevent freezing of the tracks.The tracks should be operated without tension, to avoid undue wear of

moving parts. When properly adjusted, there should be no less than I toll/z inches (2.5 to 3.8 em.) slack measured at a point half way betweenthe carrier roller and front idler as shown at (1). Looser adjustment maybe required to prevent tension on the tracks when operating in materialwhich will pack around the track parts and between pins and bushings.

CHECKING TRACK ADJUSTMENT

I-There should be I to 111z inches (2.5to 3.8 em.) sag at this point .

•

To Adjust When Equipped With Ball Check TypeHydraulic. Track Adjusters:

If the slack or sag in the track is greater than I liz inches, proper adjustment can be obtained by proceeding as follows:

I. Raise the inspection plate on the track roller frame guard


2. Apply ball and roller bearing lubricant, with a grease gun, into thefitting (4) until the track is at the correct adjustment.

3. Operate the machine backward and forward to equalize the adjustment.

4. Recheck the adjustment.

As continued track adjustment becomes necessary through service, thefollowingprecaution should be observed to prevent damage to the equalizer spring support bracket on earlier direct drive tractors, and damage to the track adjusting cylinder on later direct drive and all torqueconverter tractors.

The maximum measurement (2) between the adjacent faces of thespring pilot assembly and the cylinder must not exceed 53fs inches(13.6 em.).

2-Maximum measurement. 3-Relief valve. 4-Fittinq. 5-Vent holes. 6-Ball checkassembly. 7-510t in lower section of threads.

To Loosen Track Adjustment: If the track is too tight, release some ofthe pressure in the hydraulic track adjuster cylinder with caution as givenin the followingsteps:

I. Turn the relief valve (3) one turn counterclockwise and allow greaseto escape from the vent hole (5) just below the relief valve. If greasedoes not appear when this relief valve is backed offone turn, proceedto turn the ball check assembly (6) one turn counterclockwise.If grease does not apear at either vent hole and the vent holes appear to be open and the track appears to have tension, the machineshould be started and moved forward slightly.


NOTE

If loosening both the relief valve and the ball check assembly one turn does not relieve track tension, then continue loosening the relief valve until the unthreaded portionbetween the upper and lower threaded section is exposed.Grease should then relieve through slot (7) in the lowersection of threads.

2. Tighten the relief valve and the ball check assembly when sufficientslack has developed in the track.

3. Check the adjustment.

4. Repeat the above steps until the adjustment is correct.

To Adjust When Equipped With Earlier Type Hydraulic Track Adjusters!

1. Loosen the bolt, turn the lock and raise the inspection plate in backof the equalizer spring support bracket (7).

2. Apply ball and roller bearing lubricant, with a grease gun throughthe fitting (4) until the track is at the correct adjustment.

3. Operate the tractor backward and forward to equalize the adjustment.

4. Recheck the adjustment.

ADJUSTING TRACK(Guards removed for illustration

purpose only)

2-Maximum measurement. 3-Relief valve.4-Fitting. 5-Spring pilot assembly.6-Cylinder. 7-Equalizer spring

support bracket .

•

To Loosen Track Adjustment: If the track is too tight, release some ofthe pressure in the hydraulic track adjuster cylinder with caution as givenin the following steps:

1. Loosen the screw in the track adjuster relief valve (3) no more thanone half tum and allow grease to escape from the passages on theside of the valve.


WARNING

To avoid the possibility of personnal Injury, do not loosenthe screw in the release valve more than one half turn asthe pressure in the cylinder could blow the screw out of thevalve with considerable force. As an added precaution,place a heavy cloth or piece of canvas over the valve to stopeither the screw or grease frombeing blown from the valve.

2. Tighten the screw in the release valve.3. Check the track adjustment.4. Repeat the above steps until the adjustment is correct.

FINAL DRIVE SPROCKET HUB BEARINGS

During the initial operation of the tractor the sprocket hub bearingsare likely to require some adjustment. Bymaintaining the proper adjustment bearing life can be increased. They should be checked on a newtractor and adjusted if necessary after the first 120 hours of operation,another check or two at 120 hour intervals is suggested but thereafterevery 1200hours should be sufficient. If leakage of lubricant is noticedaround the sprocket hub on a new tractor before 120hours of operationan adjustment of the bearing may stop the leak.

To check the bearing adjustment, place a four or five foot bar betweenthe track roller frame and the sprocket. If any looseness in the sprockethub bearings is noticed when prying WIththe bar, adjustment is necessary. This check should be made when there are no objects under thetrack which might put the tractor weight on the sprocket.

To Adjust: Remove the guard plates (I) and (2) from the track rollerframe outer bearing, and remove nut and lock from the clamp bolt (4), atthe bottom of the holder assembly. Tighten the adjusting nut (3) by turn-

CROSS SECTION OF FINAL DRIVE TIGHTENING SPROCKET HUB BEARINGSI-Large guard plate. 2-Small guard plate. 3-Adjusting nut. 4-Clamp bolt.


ing it counterclockwise. Usea five footextension on the wrench to be surethe nut is tight. Replace lock and clamp bolt nut then tighten the clampbolt and replace the guard plates. A wrench for this purpose can be obtained fromyour "Caterpillar" dealer.

DRAWBAR

It will be found that the greatest amount of service will be obtainedfromthe drawbar if it is pinned, in the non-swinging positionwhen doingscraper, heavy grading and similar work that imposes severe stress. Thedrawbar pin may be removed and the drawbar allowed to swing if itproves advantageous to do so on jobs less severe in nature.

The tractor is equipped with a drawbar which can be moved to anyone of five positions after removing the drawbar pin (1) to free the drawbar (3). The latch (2) locks the drawbar pin in position so it cannot workout of place. The wear shoe (4) should be inspected periodically andreplaced when necessary.

DRAWBAR

I-Drawbar pin. 2-Latch locks.3-Drawbar. 4-Wear shoe.

•

TI4041

If the tractor is equipped with a counter-weight (which is an attachment) mounted on the drawbar plate, the drawbar cannot be moved.

WASHING GEAR COMPARTMENTS

Washing the Transmission: Remove the drain plugs from the speedchange and bevel gear compartments after a run, when the oil is warm.This drains the speed change compartment and the bevel gear compartment. Replace the plug and fill to the proper level with kerosene or some


non-inflammable cleaning fluid. Drive the tractor back and forth for 5minutes, if it is convenient. If not, start the engine and put the gears in thehighest speed. Tie back the steering clutch levers and engage the flywheel clutch. Allow the gears to run 5 minutes, disengage the clutch, andshift into neutral. Service the transmission oil filter at each oil changeperiod. Drain the cleaning fluid, replace drain plugs and refill with freshlubricant to the correct level as instructed in the LUBRICATIONINSTRUCTIONSsection of this book.

Washing the Final Drives: Remove the drain plugs from both casesafter a run, when the oil is warm, and allow the old oil to drain. Replacethe plugs and fill the compartments to the proper level with kerosene orsome non-inflammable cleaning fluid. Drive the tractor back and forth forfive minutes. Drain the cleaning fluid, replace drain plugs and refill thefinal drives with fresh lubricant as instructed in the LUBRICATIONINSTRUCTIONSsection of this book.

Washing the Starter Pinion Shaft Housing: Remove the drain plugfrom the under side of the housing and allow the old oil to drain. Replacethe plug and fill the housing to the level of the top of the filler elbow withkerosene or some non-inflammable cleaning fluid. Allow the washingfluid to stand for 5 or 10minutes then drain, replace drain plug and refillwith fresh oil.

Washing the Starting Engine Transmission: Occasionally, wash thestarting engine transmission. Remove the drain plug after the startingengine has been turning the transmission gears and has warmed theoil. After oil has drained, replace the plug and fillthe compartment to theproper level with kerosene or some non-inflammable cleaning fluid. Allowthe starting engine to turn the transmission gears for several minutes,then remove the drain plug. After all the cleaning fluid has drained,replace the plug and fillwith fresh oil to the correct level.

Washing Belt Pulley Drive and Rear Power Take-Off Housings: Removethe drain plug from the housing when the oil is warm, and allow the oilto drain. Replace the drain plug and fill the housing to the correct levelwith kerosene or some non-inflammable cleaning fluid. Operate the gearsfor five minutes to wash the housing. Drain the cleaning fluid, replacedrain plug and refill the housing to the proper level as instructed in theLUBRICATIONINSTRUCTIONSsection of this book.

TRANSMISSION LUBRICATING OIL SYSTEM

The tractor is equipped with a full-flow transmission lubricating oilfilter. The filter has one plastic impregnated paper type filter element inthe filter housing.


The filter element should be replaced with a new "Caterpillar" elementevery 480hours.

The filter element should be checked every 120 hours for excessivesludging. If excessive sludging of the filter element is observed, the element should be replaced with a new "Caterpillar" element.

When the transmission has been disassembled and reconditioned, thefilter element should be replaced with a new element after the first 20hour operating interval.

To service the filter:

1. Remove the drain plug (4) from the oil filter base (3). Then loosenthe damp screw and remove the cover and screw as a unit.

FULL-FLOW TRANSMISSIONLUBRICATING OIL FILTER

I-Full-flow element. 2-Housing.3-Filter base. 4-Drain plug .

•

2. Liftout the full-flowelement (1) and discard it.

3. Install a new "Caterpillar" element in the housing (2).

4. Reinstall the cover, tighten the damp screw and replace the drainplug.

•

89

Attachment InstructionsAttachments are available from your "Caterpillar" dealer. Many of

these attachments will add to operator comfort and convenience as wellas increase the usefulness of your tractor.

REAR MOUNTED EQUIPMENT

Rear mounted equipment is driven with power from the transmissionupper shaft whenever the flywheel clutch is engaged. The transmissionbearings and gears are lubricated by oil from the pump located in thebevel gear compartment. Whenever the transmission top shaft is turningit will drive the pump to lubricate the transmission. When operating onstationary work, see the topic, CONTINUOUSOPERATIONON STATIONARYWORK.

Direct Drive Rear Power Take-Off Operations: Disengage the flywheelclutch, shift the speed selector lever into neutral position. Pull the powertake-off control lever (1) to the rear to engage the sliding gear with thedrive gear. Engage the flywheel clutch to deliver power through thetransmission to the power take-off.

POWER TAKE·OFF CONTROLLEVER

I-Control lever.

BELT PULLEYDRIVE CONTROLLEVER

I-Belt pulley drive control lever (disengaged position). 2-Engaged position.

Belt Pulley Drive Operation: Disengage the flywheel clutch and shiitthe speed selector lever into neutral position. Pull the belt pulley drivecontrol lever (1) back as shown at (2) to engage the belt pulley shaftgear with the drive gear. Engage the flywheel clutch to deliver enginepower through the transmission to the belt pulley drive.

90 ATTACHMENT INSTRUCTIONS

GENERATOR AND STARTING ENGINE ELECTRIC STARTER

Never operate a generator with an open circuit between it and thebattery.

Cleaning Generator Or Electric Starter: Approximately every 1,200hours, the inspection covers should be removed from the generator andstarter and a check made of the commutator. If it is glazed or darkened,polish it with "00" sandpaper. To polish, hold the sandpaper on the commutator with a stick while the commutator is turning. The polishingshould be done on the generator when the Diesel engine is running atlow idle speed. It should be done on the starter by pressing the starterswitch with the magneto switch turned off. Turn the sandpaper over toclean the contact surfaces of the brushes. The commutator should notbe turning when the brushes are being cleaned. Make sure all trace ofsand particles is removed from the commutator, brushes, and brushholders by blowing out with air or an equally effectivemethod.

SANDING GENERATOR BRUSH

•

Brush Replacement: Brushes should be inspected and replaced Ifbadly worn. When a new brush is installed, seat it properly with thecontour of the commutator by using "00" sandpaper. Remove all sandparticles and make certain the connections are all tight. A poor connection in the charging circuit will cause the generator to build up excessive voltage which may result in burned field or armature windings.A poor connection in the generator field circuit will cause a low voltage.

General Reconditioning; Approximately every 4,000 hours, the generator and starter should be removed so that they may be completelydisassembled, washed and have all parts replaced that show evidence

ATTACHMENT INSTRUCTIONS 91

of being unsatisfactory for reason of wear. It is suggested that this cleaning and reconditioning be entrusted to your "Caterpillar" dealer.

Starting Engine Starter Drive: If difficulty is experienced with theelectric starter drive failing to engage with the sliding gear, dirt in theworm drive is probably responsible. To correct, remove the starter fromthe mounting bracket, then take off the starter drive housing. Carefullyclean the spiral grooves of the drive of any dirt or grease accumulations.Wash the spiral sleeve upon which the pinion operates. Also the springs,gear teeth and drive housing. This washing should be done with kerosene or some non-inflammable cleaning fluid.

Before installing the drive, lubricate the spiral sleeve and housingbushing with a few drops of light oil. Then reassemble and install.

BATTERY CARE

Every 60 hours, or more often when continuous operation without theuse of the battery is encountered, the followingattention should be givento the battery to insure high efficiency and maximum operating life.

The battery should be tested with a hydrometer and kept within amargin of safety to a specific gravity above 1.275.A dangerously lowpoint of charge is indicated by a hydrometer reading of 1.150which willpermit the battery to freeze. A specific gravity of 1.250will permit thebattery to withstand temperatures as low as -300 F. without freezing.

Water that escapes by evaporation should be replaced with distilledwater or "approved water" (water free from impurities by analysis). Thelevel should be maintained 3fs inch (9.5mm.) above the top of the separators or insulators. Do not overfill or underfill the cells of the battery aseither has a detrimental effect on battery life.

If it is necessary to add water too frequently to the battery, it is probably being overcharged and checks should be made to find and correctthe trouble. Loose ground connections or a poorly functioning voltageregulator will cause overcharging of the battery.

Some batteries are provided with filler plugs having special construction. These plugs, when removed for filling the battery, should be pressedon the raised portion of the vents. This prevents overfilling, as air entrapped in the top of the cells forces the excess water out through thefiller openings. When the filler plugs are removed from the vents theentrapped air escapes, dropping the water to the proper level in thebattery.


TESTING SPECIFIC GRAVITYOF ELECTROLYTE

•

Always test a battery for degree of charge before adding water. Otherwise, before an accurate reading can be obtained, it will be necessaryto operate the engine for a short period to charge the battery; thus allowing the water to mixwith the electrolyte.If when making weekly tests the battery shows evidence of becoming

gradually discharged; that is, when the specific gravity reading dropsbelow 1.250,the battery should be removed and completely recharged.Check to determine the reason for the battery becoming discharged.

Inspect the battery terminals and other points in the wiring. A looseconnection or worn insulation may be the reason for the battery becoming discharged. Also check for an improperly functioning voltage regulator. Referto the topic,VOLTAGEREGULATOR.

Keep the top of the battery clean and dry to prevent current lossesand keep the terminals clean and tight. To clean corrosion from thebattery terminals, scrub them with a weak solution of bicarbonate ofsoda (baking soda) and water. Dry the battery thoroughly, then coatthe terminals with lubricant to prevent corrosion. Keep the battery securely fastened in its compartment at all times.When replacing a battery that has been removed, make certain the

negative post marked with a dash (-) or "N" is connected to the groundcable. Failure to connect the battery terminal to the correct post willdamage the voltage regulator.

VOLTAGE REGULATORThe voltage regulator is properly adjusted at the factory and should

not be changed except in case of failure. Then both the regulator andgenerator should be taken to your "Caterpillar" dealer, where the outputof the generator can be checked and the regulator adjusted accordingly.If the ammeter shows a low charging rate, it is not an indication that

the equipment is at fault unless the battery shows a low reading when

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WIRING DIAGRAMSThese diagrams, covering wiring arrangements for use with and with

out battery and cab, are furnished so that when it becomes necessaryto disturb the electrical equipment for purpose of repair or replacement,reassembling may be accomplished without difficulty.

REGULATOR

+F. G.A.

BATTERY

CIRCUITBREAKER SWITCH

R. H. REAR LAMP

GENERATOR

R. H. FRONT LAMPLIGHTING SYSTEM- WITH BATTERYWithout cab-with 6 volt. 18 ampere

generator and two white lights.

R.REARLAMP

+

BATTERY -=

GENERATORLIGHTING SYSTEMS - WITH OR WITHOUT CABWITH BATTERY AND 6 VOLT STARTING MOTOR

oz

LEFTFRONTLAMP

RIGHTFRONTLAMPa

With cab and 6 volt 40 ampere generator use the above diagram.Without cab, with 6 volt 40 ampere generator use the above diagram

ATTACHMENT INSTRUCTIONS 95

and omit the tail lamp. Lighting systems without 6 volt starting motor,a wire from the positive post of the battery is installed to the ammeteras shown by dotted line.

RIGHTREARLAMP

TI4350

A

FL.

GENERATOR

LIGHTING SYSTEM-WITHOUT BATTERYWithout cab-with 6 volt, 40 ampere generator and two white lights .

Air CleanersAir Inlet Pipe ExtensionAttachment InstructionsBall and Roller BearingLubricant

Battery CareBelt Pulley Drive OperationBrake Adjustment, SteeringClutch

IndexPage11-43

4721-89

.Inside Back Cover62

CapacitiesCarburetorClutch, FlywheelClutch, Starting EngineContinuous Operation onStationary Work

CoolantsCooling SystemCrankcase Lubricating OilCrankcase Lubricating OilSystem

Crankcase Lubricating OilChange Period Chart,Diesel Engine ..

14-7310-72

3733-6433-647-10

•

89189

Daily Care ...Diesel Fuel Tank, Care 01 theDiesel Fuel Tank Filler CapDraining the Cooling SystemDraining the Starting EngineClutch Housing

Draining Steering ClutchCompartment

Draining the Flywheel ClutchCompartment

Driving the Tractor ...Drawbar

79

48

ElementsFull-Flow Lubricating OilFuel Filters

Fan BeltFinal Drive SprocketHub Bearings

Flywheel Clutch, AdjustmentFuel Filter, Care 01 theFuel Fiher ElementsFuel Injection EquipmentFuel Injection Pumps8

...:~IIIoZ

RIGHTFROIHLAMP

Page38525264

72

81

143486

13-4854

66

857354545760

96

INDEX - Continued

Page58Fuel Injection Valves

Fuel Pressure GaugeFuel Supply, Care of theFuel System .Fuel System, Priming theFuel System, Starting EngineFuelsFuel Tank, Care of the Diesel.GaugesFuel PressureOil Pressure ..Water Temperature

Generator and Starting EngineElectric Starter

Hour MeterLighting SystemsLubricantsLubricants Information, GeneralLubrication Chart ..Lubrication Instructions-Lubrication of Miscellaneous

PointsLubrication of AttachmentsMagnetoMaintenance InstructionsModel Views .Oil PressureOil Viscosity Recommendations.Operating in Cold WeatherOperating in Deep Mud orWater .

Operating Over an Obstruction.Operating Starting EngineElectric Starter ...

Operation InstructionsPosition Controls for Starting.Pre-CleanerPreparing the Tractor for Use.Priming the Fuel SystemPumps, Fuel Injection .Radiator Sealed Pressure. Overflow Unit

•Rear Mounted EquipmentRear Power Take-Off Operations

Sediment Bowl Filter and FuelLine Screen

Serial NumberLocation Inside Back Cover

FORM 30882-5

21-906

93396

9A6

6943

4-5

6622-89

89

Spark Plug AdjustmentSpecific Gravity, BatteryStarter, Electric for StartingEngine 21-28-90

Starting Engine Clutch,Adjustment

Starting Engine MagnetoStarting Engine, StorageStarting Engine TransmissionStarting the Diesel EngineStarting the Starting EngineSteering Clutches and BrakesSteering the Tractor .Stopping the TractorStopping the Diesel EngineStorage

55505356624952

553333

621

Temperature, Operating,Engine

Track AdjustmentTractor Initial ServiceTrack Roller LubricantTractor RecheckTransmission OilTransmission LubricatingSystem

Page6991

736941

19-3129267535363740

Diesel3381259

259-19-20

Oil87

Valve Clearance, Diesel Engine 67Valve Clearance,

Starting Engine 69Valve, Fuel Injection 58Voltage Regulator 92Valve Rotators, Checking 68Washing Belt Pulley Drive andRear Power Take-Off

337

39

3636

2825

Housings .Washing Gear CompartmentsWashing the Final DriveWashing the Starter PinionShaft Housing

Washing the StartingEngine Transmission

Washing the Steering ClutchBrakes

Washing the TransmissionWash the Diesel EngineCrankcase

Wash the Starting EngineCrankcase

Water TemperatureWiring Diagrams

2647255660

63

23-8719-23-86

20-87

87

87

8019-86

49

493394

2-62PRINTED IN U.S.A.

CapacitiesApproximate quantities

Crankcase Lubricating Oil System,Diesel Engine . . . . . . . . . . . . . . . . . . 34 qt.Starting Engine 2 qt.

Fuel Injection Pump Housing .. 3f4 qt.Air Cleaner, Diesel Engine . . . . 5 qt.Air Cleaner, Starting Engine 3f4 qt.Fuel Tank, Diesel .68112 U.S. gal.Fuel Tank, Starting Engine ..... 4112 qt.Cooling System

Tractors effective with 2U9662. 25 U.S. gal.Tractors before 2U9662 30 U.S. gal.

Final Drive (each) 20 qt.Transmission

Tractors effective with 2U5307 41 qt.Tractors before 2U5307 38 qt.

Transmission, Starting Engine 3f4 qt.

Location of Serial Number

CA'IERP.AR TRACTOR CO.------ PEORIA,IWNOIS, U. S. A. -----

Diesel Engines • • • • Tradors • . . . Motor Graders• • • • • • • Earthmoving Equipment . . . .

THIRI IS A CATIRPILLAR DIALER NIAR YOU

FORM 30,882-5PRINTED IN U.S.A.

tractor...operation and maintenance 41nstructions form30882-5 caterpillar db tractor serial numbers...

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