tm 10-3930-626-12 united tractor model g40c nsn 3930-181-3217

8/14/2019 TM 10-3930-626-12 UNITED TRACTOR MODEL G40C NSN 3930-181-3217

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TM 10-3930-626-12

D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L

TECHNICAL MANUAL

OPERATOR AND ORGANIZATIONAL

MAINTENANCE MANUAL

TRACTOR, WHEELED, WAREHOUSE

GASOLINE, PNEUMATIC-TIRED

4,000 POUND DRAWBAR PULL

ARMY MODEL MHE -217

UNITED TRACTOR MODEL G40C

FSN 3930-181-3217

H E A D Q U A R T E R S , D E P A R T M E N T O F T H E A R M Y

JUNE 1971


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W A R N I N G

Check the operating area to be sure it is clear of personnel and obstructions.

Do not al low smoking or the use of an open flame in the immediate vicinity while servicing the

ba t t e r i e s . Ba t t e r i e s gene ra t e hyd rogen , a h igh ly exp los ive gas .

When fi l l ing the fuel tank, always provide a metal-to-metal contact between the container and the

fuel tank. This wil l prevent a stat ic spark from being generated as fuel flows over metall ic surfaces. Do

not fill fuel tank while the engine is running. Fuel spilled on a hot engine may explode and cause injury

to pe rsonne l .

Exercise care at al l t imes while handling electrolyte. When necessary to dilute electrolyte, always

pour acid into water. Avoid breathing fumes and do not permit electrolyte to come in contact with skin.

If electrolyte comes in contact with skin, wash affected area immediately with baking soda solution or

with l iberal quanti ty of water. If electrolyte splashes into eyes, wash immediately with l iberal quanti ty

of clean water and obtain medical aid as soon as possible.

Be alert for other workers to be sure they are not in the way of the moving tractor or towed load.

If the tractor is operated in an enclosed area, be sure adequate venti lat ion is provided. Exhaust

gases contain carbon monoxide. Continued breathing of exhaust fumes is dangerous and can be fatal .

Use only approved cleaning solvents to prevent the possibil i ty of fire or poisoning.

If the tractor is parked on an incline, block at least two wheels in the event of handbrake fai lure.

Radia tor c leaning compound conta ins s t rong ac id . Avoid contact wi th sk in . I f compound comes

into contact with skin, wash affected area immediately with baking soda solution or with l iberal quanti ty

o f w a te r . I f compound sp l a shes i n to eyes , w ash immed ia t e ly w i th p l en ty o f co ld o r w arm w a te r andobtain medical aid as quickly as spossible.


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TM 10-3930-626-12

manufacturers mounting and safety

instructions. Failure to do so could

cause serious injury or loss of life.

WARNING

Never inflate tires over 40 PSI to seat

tire bead. Serious injury or loss oflife could result.

WARNING

When inflating tires in a safety cage,

always use an extension air hose andgage for safety cage use. Failure to

do so could cause serious injury.

(6). Chan ge sub-para graph c. to read;

C. Installation. Using tire lubricant, assem-

ble the tire an d rim components. Inspect th e

wheel assembly to insu re all components are

properly installed. Place wheel assembly in

safety cage and using an extension airhose

and gage, inflate t ire to a ma ximum of 15 PSI,

an d allow tu be to center itself in th e tire. In-

flate tire not to exceed 40 PSI to seat both tire

beads. Both tire beads should seat properly

before reaching 40 PSI. If tire beads fail to

seat, deflate t ire, determine cause, ta ke cor-

rective action, add additional tire bead lubri-

cant and inflate to recommended pressure.

Page 4-50, paragraph 4-62. Drive wheel and

Tires:

(l). After sub-Pa ra gra ph a .(2) add th e follow-

ing note :

NOTE

Removal may be easier if weight of wheel

is supported by a wheeled floor jack or

dolly

(2). After su b-para gra ph a . (3) add th e following

WARNING:

WARNING

Be sure tire is fully deflated before

proceeding with next step. Failure to

do so could result in injury or death.

(3). Delete sub-paragraph b. (1) and renumber

sub-paragra phs (2) and (3).

(4). Add the following to sub-paragraph b. (3):

Reference TM 9-2610-200-24 CARE, MAINTE-

NANCE, AND REPAIR OF PNEUMATIC

TIRES AND INNER TUBES for additional in-formation concerning tire maintenance.

(5). Add th e following WARNINGS prior t o sub-

paragraph c:

WARNING

Always use an inflation safety cage

to inflate tires mounted on multi-

piece rims and tire/rim assemblies

not mounted on tires changing ma-

chine that has a positive lock downdevice designed to hold the assem-

bly during inflation. . When using atire changing machine, always followmanufacturer mounting and safety

instruction. Failure to do so could

cause serious injury or loss of life.

WARNING

Never inflate tires over 40 PSI to seat

tire beads. serious injury or loss oflife could result.

WARNING

When inflating tire in a safety cage,always use an extension airhose andgage for safety cage use. Failure todo so could cause serious injury.

(6). Chan ge sub-par agra ph c. to read:

Using tire lubricant, assemble the tire and

rim components, In spect t he wh eel to insu re

all components are properly installed. Place

wheel assembly in safety cage and using anextension airhose and gage, inflate tire to a

maximum of 15 PSI, and allow tire to com-

pletely deflate. This will allow the tube to cen-

ter itself in the tire. Inflate tire not to exceed

40 PSI to seat both tire beads. Both t ire beads

should seat properly before reaching 40 PSI.

If tire beads fail to seat, deflate tire, determine


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TM 10-3930-626-12

cause, ta ke corr ective a ction, a dd a dditional

tire bead lubricant and inflate to recom-

mended pressure. Concave mounting holes in

one wheel must mate with convex mounting

hole in second wheel.

2-14.1 AIR CLE ANER/AIR FIL TER NBC

WARNING DECAL

A decal has been developed that warns of

NBC exposure. It is to be positioned in a no-

ticeable place on or near tyhe fir filter housing

or a ir cleaner. You m ay order t he decal using

part number 12296626, CAGEC 19207. Refer

to TB 43-0219 for futh er in form at ion.

Figure 2-2 NBC Warning Decal

By Order of the Secretary of the Army:

GORDON R. SULLIVAN

General, United S tates Army

Chief of Staff

Official:

PATRICIA P. HICKERSON

Brigadier General, United States Army

The Adjutant General

Distribution:

To be distributed in accordance with DA Form 12-25-E (Block No. 2275) Unit maintenance requirements

for TM10-3930-626-12.


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TECHNICAL MANUAL

No. 10-3930-626-12

OPERATOR AND

T R A C T O R , W H E E L E D ,

TM 10-3930-626-12

H E A D Q U A R T E R S

DEPARTM ENT OF THE ARM Y

Washington, D. C., 12 January 1971

ORGANIZATIONAL MAINTENANCE MANUAL

W A R E H O U S E G A S O L I N E , P N E U M A T I C - T I R E D

CHAPTER

Section

CHAPTER

Section

CHAPTERSection

CHAPTER

Section

CHAPTER

Section

4 , 0 0 0 P O U N D D R A W B A R P U L L A R M Y M O D E L M H E E - 2 1 7

U N I T E D T R A C T O R M O D E L C 4 0 C

1

III

2

III

II IIV

V

VI

3I

II

II IIVV

4

III

II IIV

V

VI

VIIVIII

IXX

XIXIIXIIIXIVXV

XVIXVII

5

III

FSN 3930-181-3217

INTRODUCTION

General . . . . . . . . . . . . . . . . . . . . . . . .Description and data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATING INSTRUCTIONSService upon receipt of tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . .Movement to a new worksite . . . . . . . . . . . . . . . . . . . . . .Controls and instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation under usual conditions . . . . . . . . . . . . . .Operation under unusual conditions . . . . . . . . . . . . . . . . . . . . . .Operation of auxiliary material . . . . . . . . . . . . . . . . . . . . .

Used in conjunction with the equipment . . . . . . . . . . .

OPERATOR MAINTENANCE INSTRUCTIONSBasic issue items . . . . . . . . . . . . . . . . . . . . . .Lubrication instructions . . . . . . . . . . . . . . . . . . . . . . . . . .

P r e v e n t i v e m a i n t e n a n c e c h e c k s a n d s e r v i c e s . .Operators troubleshooting . . . . . . . . . . . . . . . . . . .Oper at ors m ain ten an ce of tra ctor . . . . . . . . . . . . . . . . .

ORGANIZATIONAL MAINTENANCEService upon receipt of tractor . . . . . . . . . . . . . . . . . . . . . .Repair parts, special tools, and equipment . . . . . . . . . . . . . . . . . . . . . . . . . .Lubrication instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preventive maintenance checks and services . . . . . . . .Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .

Radio interference suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . .Maintenance of positive crankcase ventilation systemMaintenance of basic engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air intake and fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil filter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrical system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Universal joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wheels, tires, and wheel bearings and springs . . . . . . . . .

Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ADMINISTRATIVE STORAGE AND DESTRUCTION OFMATERIEL TO PREVENT ENEMY USE

Administrative storage . . . . . . . . . . . . . . . . . . . . . . . . . .Demolition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paragraph

1-11-6

2-1

2-5

2-7

2-10

2-152-222-22

3-1

3-2

3-43-63-8

4-1

4-34-6

4-12

4-144-16

4-19

4-214-30

4-34

4-414-434-454-524-54

4-59

4-64

Page

1-1

2-12-1

2-22-52-62-7

2-7

3-13-1

3-33-33-4

4-1

4-14-1

4-24-34-44-74-7

4-154-17

4-25

4-264-28

4-42

4-43

4-48

4-51

5-15-1

i


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P age

APPENDIX A REFERENCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

B MAINTENANCE ALLOCATION CHART . . . . . . . . . . . . . . . . . . . . . . . . B-1

B BASIC ISSUE ITEMS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1

ii


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L I S T O F I L L U S T R A T I O N S

Number Title

1-1 Tractor, three quarter front view . . . . . . . . . . . . . . . . . . . . . .

1-2 Tractor, three quarter rear view . . . . . . . . . . . . . . . . . .

2-1 Location of controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . .

3-1 Opera tors daily service lubrication points . . . . . . . . . .

3-2 Cooling system service points . . . . . . . . . .3-3 Servicing air cleaner . . . . . . . . . . . . . . . . . . .

3-4 Servicing battery . . . . . . . . . . . . . . .

4-1 Radio interference suppression components . . . . . . .

4-2 PC V ins ta lla t ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 Compression test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4 Checking ignition timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manifold vacuum test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Partial view of right side of engine . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .

4-54-6

4-8

4-9

4-104-114-124134-144-1.5

416

4-174184-194-2 ()

4214-2242 34-244-25

4-2642 7

4-28

4-29

4-30

4-31

4-324-33

4-344-354364-3 7

4-38

4-394-404-41442

Valve adjustment . . . . . . . . . . . . . . . .Engine manifolds, exp loded view . . . . . . . . . . . . . . . . . . . . . . . ................ . . . . . . .. ..

Fan belt and water pump installation . . . . . . . . . . . . . . . . . . . . .Water pump, fan and fan belt . . . . . . . . . . .Cooling system, exploded view . . . . . . . . . . . . . . . .

Carburetor and linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fuel pump . . . . . . . . . . . . . . . . . . . . . . . . .Fuel pump test setup . . . . . . . . . . . . . . . .Fuel tank installation . . . . . . . . . . . . . . .

Governor adjustment . . . . . . . . . . . . . . . . . .Accelera tor pedal a nd t hr ottle lin kage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil filter system . . . . . . . . . . . . . . . . . . . . . . . . .Exhaust system . . . . . . . . . . . . . . . . . . . .Wiring diagram . . . . . . . . .Hook-up for generator output test . . . . . . . . . . . . . . . . . .

Checking cutout relay armature air gap . . . . . . . . . . . . . . . .Cutout relay contact point gap adjustment . . . . . . . . . . . .Cutout relay armature air gap adjustment . . . . . . . . . . . . . . .

Cutout relay test setup . . . . . . . . . . . . . . . .

Spring anchor adjustment . . . . . . . . . . . .Checking voltage and current regulator air gap . . . . . . . . . . . .Voltage regulator test setup . . . . . . . . . . . . . . . . . .Current regulator test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Distributor, installed . . . . . . . . . . .

Distributor, cap removed . . . . . . . . . . . . . . . . . . .Testing moving contact spring tension . . . . . .Battery and cables . . . . . . . . . . . . . .Propeller shaft . . . . . . . . . . . . . . . . . . . . . . .Parking brake lever and cable, exploded view . . . . . . . . . . . . .Parking brake, exploded view . . . . . . . . . . .Brake adjustment . . . . . . . . . . . . . . . . . . . . . . .

Brake system, exploded view . . . . . . . . . .F r o n t w h e e l s , t i r e s , b e a r i n g s , a n d h u b s , e x p l o d e d v i e wDrive wheels, and tires, exploded view . . . . . . . . . . . . . . . . .Tie rod and drag link, exploded view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page

1-21-3

2-3

3-2

3-5

3-7

3-84-5

4-64-74-84-9

4-10

4-114-12

4-13

4-144-164-18

4-194-20

4-22

4-234-244-25

4-274-28

4-294-314-324-33

4-34

4-354-36

4-374-38

4-39

4-394-39

4-414-434-444-454-464-47

4-494-514-52

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1-2.

1-3.

See Ch 3

See Ch

Superseded on Ch 3

CHAPTER 1

INTRODUCTION

Section 1. GENERAL

1-1. S c o p e

a. This manual is published for use of personnel

r e s p o n s i b l e f o r o p e r a t i o n a n d o r g a n i z a t i o n a l

ma in t enance o f t he Trac to r W hee l ed , W arehouse ,

G aso l ine , Pneumat i c -T i red , 4 ,000 pound D raw bar

P u l l , U n i t e d T r a c t o r M o d e l G 4 0 C , A r m y M o d e l

M H E - 2 1 7 , F e d e r a l S t o c k N u m b e r 3 9 3 0 - 1 8 1 -

3217, procured under Contract Number DSA 400-

70 -C-4251 .

b. This manual provides the opera tor wi th the

n e c e s s a r y o p e r a t i n g i n s t r u c t i o n s a n d w i t h i n -

s t r u c t i o n s f o r p e r f o r m i n g m a i n t e n a n c e s e r v i c e s

which are the responsibil i ty of the operator. This

m a n u a l p r o v i d e s o r g a n i z a t i o n a l m a i n t e n a n c e

p e r s o n n e l w i t h t h e n e c e s s a r y i n f o r m a t i o n f o rperforming the maintenance services which are the

r e s p o n s i b i l i t y o f o r g a n i z a t i o n a l m a i n t e n a n c e .

Throughout this manual the use of the terms right,

left, front, and rear with respect to the parts of the

tractor indicates directions from the viewpoint of

the operator sitting in the seat of the tractor.

c. Appendix A con ta in s a l i s t o f pub l i ca t i ons

a p p l i c a b l e t o t h i s m a n u a l . A p p e n d i x B i s t h e

m a i n t e n a n c e a l l o c a t i o n c h a r t a p p l i c a b l e t o t h i s

e q u i p m e n t . Appendix C con ta in s t he bas i c i s sue

items l ist and special tools l ist .

S e c t i o n I I . D E S C R I P T I O N A N D D A T A

1-4 . D esc r ip t i on

Army Model MHE-217 (fig. 1-1 and 1 -2 ) U n i t ed

Tractor Model G-40C) is a gasoline powered, front-

wheel steered, rear-wheel driven materials handling

tractor. The tractor is powered by a six-cylinder, in-

l ine, four cycle, L-head , l iqu id cooled , gasol ine

engin e. T or q u e i s t r a n s m i t t e d t h r o u gh a n

automat ic t ransmission wi th three forward speeds

and a single reverse coupled to the engine through a

torque converter. The transmission output shaft is

coupled to the drive axle through a short propeller

shaft . A drop gearbox on the drive axle provides

further speed reduct ion between t ransmission andr e a r w h e e l s . F o o t - o p e r a t e d h y d r a u l i c d r u m - t y p e

b r a k e s a r e p r o v e d a t t h e r e a r w h e e l s . A h a n d -

operated mechanical braking system is provided for

pa rk ing t he veh i c l e . The s t ee r ing mechan i sm in -

corporates a recirculat ing ball type steering gear,

d rag l i nk , and t i e rod . The e l ec t r i ca l sy s t em in -

c ludes head - l i gh t s , s t op l i gh t - t a i l l i gh t s , and ho rn .

1-1


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1-2

Paragraph

En gine, oper at ors pr even tive m ain ten an ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 9

Engine, timing adjustment . . . . . . . . . . . 4-49Exhaust pipe, inspection, removal, and installation . 4-44

Fan, removal, inspection, and installation . . . . . . 4-28Fan belt adjustment . . . . . . . . . . . . . . . . 4-28Fan belt, adjusting upon receipt. . . . . . . . . 2-3

Fan belt, deflection of when adjusted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -7Fan belt, removal, inspection, and installation . ., . . . . . . . . . . . . . . . . 4-28Filter, oil, removal, cleaning, inspection, and installation . 4-42Fire extinguisher, description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22Fire extinguisher, installing on receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Fire extinguisher, maintenance of. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24Fire extinguisher, operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23Forms and records . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Fuel gage, location and purpose of . . . . . . . . . . . . . . . 2-9

Fuel pump, characteristics of. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Fuel pump, cleaning, testing, removal, and installation . . . . 4-37Fuel tank, capacity of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Fu el ta nk , opera tor s ser vice. . . . . . . . . . . . . . . . 3-13

Fuel tank, removal, cleaning and installation . . . . . . . . . . . 4-38

Fuel tank, service upon receipt. . . . . . . . . . . . . 2-3

Gearcase, drop, description of. . . . . . . . . . . . . . . . . . . . 1 -0

Gearcase, drop, service upon receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -3

Generator, characteristics of. . . . . . . . . . . . . l - 7

Generator, testing, removal, and installation, . . . . . . . . . . . . . . . . . . . . 4-46Gener at or regulator, cha ra cteristics of . . . . . . . . . . . . 1-7

Governor, adjustment . . . . . . . . . . . . . . . . . . . . . . 4-39

Headlight switch, description and location of . . . . . . . . . . . . . . . . . . . 2 - 8

Hoisting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -5

Horn button, location and use of. . . . . . . . . . . . 2 - 8

Hoses, radiator, inspection. removal, and installation . 4-31Hour meter, location and purpose of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Identification of tractor . . . . . . . . . . . . . . . . . . . . . . 1-7

Ignition switch, description and location of . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Left hand, definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Lubrication, care of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7Lubrication points, cleaning. . . . . . . . . . . . . . . 4-8

Lubrication points serviced by operator . . . . . . . . . 3-3

Lubr icat ion, opera tors , deta i led informa tion . . . . . . . . . . . . . . 3-3

Lubrication, operators, general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Lu bri cat ion, orga niza tion al m ain te na nce. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6M a n i f o l d s , i n t a k e a n d e x h a u s t , r e m o v a l i n s p e c t i o n a n d i n s t a l l a t i o n . . 4-27Master cylinder, access for service . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Mast er cylinder, bra ke, insp ection, removal an d ins ta llation . . . . . . . . . . . . . . . . . . . . . . . . 4-57Master cylinder, characteristics of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 7

Moving t o new wor ks it e . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 5

Muffler, inspection, removal, and installation . . . . . . . . . . . . . . . . . . . 4-44

Oil filter, removal, cleaning, inspection, and installation . . . 4-42Oil pressure gage, location and purpose of . . . . . . . . . . . . . . . . . . . . . . 2 -9

Operation, extreme cold conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15Operation, extreme heat. . . . . . . . . . . . . 2-16Operation, high altitudes . . . . . . . . . . . . . . . . . 2-21

Page3 - 44-384-26

4-134-14

2 -1

4-134-252 - 7

2 - 1

2 - 72 - 71 - 12 - 4

4 - 1 8

3 - 74-212 - 1

2 - 1

4-23

2 - 42 - 12 - 44-152 - 4

2 - 4

4 - 14 - 13 - 13 - 1

3 - 1

4 - 14-114 - 1

4-48

2-14-264-252-42-62-62-7

Operation, normal conditions. . . . . . . . . . . . . 2-112-14 2-52-6

Operation, rainy or humid conditions . . . . . . . . . . 2-18 2-7

Operation, salt water areas . . . . . . . . . . . . . . . . 2-19 2-7

Operation, sandy or dusty conditions . . . . . . . 2-17 2-6Operation, snow or mud . . . . . . . . . . . . . . . . . . . . . 2-20 2-7

Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 5 1 -3

Parking brake, adjustment and repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55 4-43

Pa rk ing bra ke, descr ipt ion of. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Parking brake cable, removal and installation . . . . . . . . . . . . . . . . . . 4-55 4-43

Par king brak e lever, adjustm ent, removal, cleaning, inspection andinstallation, . . . . . . . . . . . . . . . . 4-55 4-43

P a r k i n g b r a k e l e v e r , l o c a t i o n a n d u s e o f . . . . . . . . . . . . . . 2 - 8 2-4

Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -7

Pintle release cable, location and use of . . . . . . . . . . . . . . . . . . . . . . . 2 - 8 2-4

Positive crankcase ventilation, description of . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 4-6


33/124

See Ch 3

Figure 1-2. Tractor, three-quarter rear view.

1-5 . I d e n t i f i c a t i o n a n d T a b u l a t e d D a t a (2) Performance ,

a . Iden t i f i ca t i on . A n i d e n t i f i c a t i o n p l a t e i s Towing capacity:m o u n t e d o n t h e o p e r a t o r s s i d e o f t h e e n g i n e

Level . . . . . . . . . . .160, 000 lb

f i rewall d irect ly below the ins trument panel . ThisOn gra de (ascending or

descending) :p l a t e s p e c i f i e s t h e n o m e n c l a t u r e , m o d e l , s e r i a l

n u m b e r , F e d e r a l S t o ck N u m b e r , C on t r a c t2 per cent . . . . . . . . . . .83 ,800.800 lb4 per cent , . . . . . . . . . . . . . .56,200 lb

Number, delivery date, and capacity of the tractor. 6 per cent . . . . . . . . . . . . . . .41,800 lb8 per cent . . . . . . . . . . . . . . .32,800 lb

Man ufactu rer . . . . . . . . . . . . . Unit ed Tra ctor, Inc. 10 per cent . . . . . . . . . . . . . .26,800 lb

Model . . . . . . . . . . . . . . . . . .. G40C 12 percent . . . . . . . . . . . . . .22,400 lb

Serial Nu mber Ra nge . . . . . 10301 thr u 11018 14 per cent . . . . . . . . . . . . . .l8,200lb

Speed (maximum ):. . . . . . .

b . Tabul a t ed Dat a .

(1) C a p a c i t i e s .

Cooling s yst em . . . . . . . . . . . 14 qtCr an kca ae . . . . . . . . . . . . . . . .6 qtFuel tank . . . . . . . . . . . . . . . . 13 galHydraulic brake system . ...1 ptSteering gear

Transmission a nd t orque

conver te r . . . . . . . . . . . . . . 8 qt

Drop gea rca se . . . . . . . . . . . . .l ptDifferen tia l . . . . . . . . . . . . . . . 9 p t

Forward . . . . . . . . .13 mph

Reverse . . . . . . . . . . . . . . . . 6 mph

Turning radius: . . . . .

Inside . . . . . . . . . . . . . . . . .46 in.Ou ts ide . . . . . . . . . . . . . . . . .130 in .Approach angle (maximum ) 23 deg

Departure angle (maximum ) 18 degNegotiable greade

(maximum unloaded) 15 deg

1-3


34/124

See Ch 3

(3 ) Di mens i ons and w e i gh t ,

Len gth . . . . . . . . . . . . . . . . . .99 in.Width . . . . . . . . . . . . . . . . .65.5 in.Heigh t . . . . . . . . . . . . . . . . . .58 in.Weight (shipping) . 5,000 lb

(4) Tires .

Rear (drive ):Nu mber . . . . . . . . . .Size . . . . . . . . . . . . . . . . .6.50 x 16

Ply ra tin g . . . . . . . . . . . . . . . . . . .6Inflat ion pressu re. . . . . . . . . . .45 psi

Fr ont (st eer): . . . . . . . . . . . . . . . . . .Number . . . . . . . . . . . . . . .2

Size . . . . . . . . . . . . . . . . . . . 6.00 x 9Ply r at ing . . . . . . . . . . . . . .6Inflation press ur e. . . . . . 45 psi

(5) Engine and accessories.

E n g i n e :Make . . . . . . . . . . . . . . . . . . Chrysler In dust ria lModel . . . . . . . . . . . . . . . . .931-1631-1Type . . . . . . . . . . . . . . . . . . .4 cycleNumber of cylinders . . . . .6

Arrangement. . . . . . . . . . . . . In-lineBore . . . . . . . . . . . . . . . . . . .3.25 in.Str oke . . . . . . . . . . . . . . . . . .4.62 in.Piston displacement . . . . . . . . . . . . 230 cubic in.

Compression ra tio . . . . . . . . . . . . . 7.0 to 1

Compression at cranking

speed (150 rpm ) . . . . . . . . . . 130 t o 140 psi

Governed speed. . . . . . . . . . . .

Horsepower ra ting at 2800rpm. . . . . . . . . . . . . . . . . . . . .66

Firing order (number 1cylinder at fan end)

Valve lash:

Intake (cold) . . . . . . . . . . .0.010 in.Exh au st (cold). . . . . . . . . . . . . 0.016 in.

Spark plugs:Size . . . . . . . . . . . . . . . . . . . . .l4mmGap . . . . . . . . . . . . . . . . . . . . . 0.035 in.

Distributor:

Point gap . . . . . . . . . . . . . . . . 0.018 to 0.022 in.Contact point pressure . . . . . . . . . . . . . . 17 to 22 oz.Condenser rating. . . . . . . . . . . . . . . . . 0.25 ufTiming (BTC at idle rpm) 0 deg

Timing mark location . . . Crankshaft pulleyGenerator:

Volta ge . . . . . . . . . . . . . . . . . .12 voltsCurrent rating . . . . 30 amps

Generator regulator:

Cut-out relay armature gap 0.025 to 0.027 in.Current regulator armature

gap . . . . . . . . . . . . . . . . . . . 0.048 to 0.052 in .Voltage r egulator a rmatu regap . . . . . . . . . . . . . . . . . . . 0.048t o 0.052 in.

Cut-out relay contact gap . .0.015 in.Cut -out rela y closing voltage 12.6 t o 13.6 voltsCurrent regulator amps

at 70F . . . . . . . . . . . . . . .3.0 to 3.5 am psVoltage regulator volts

at 70F . . . . . . . . . . . . . . . .14.2 t o 14.8 voltsGround polarity. . . . . . . . . . . Negative

Fuel pump:

Delivery rate (under testcondit ions). . . . . . . . . . . . . 2 pt per m in

Pump pressure (under testconditions) . . . . . . . . . . . . . 3 psi

Carburetor:

Idle speed adjustment . . . 450 to 500 rpmIdle mixture-maximum

vacuum . . . . . . . . . . . . .18 to 20 in. HgThermos t a t (nomina l ) 180FGovernor speed sett ing

Radiator pressure cap

setting . . . . . . . . . . . . . . . . 4 psiFan belt deflection at

midp oint . . . . . . . . . . . . . . . in.

(6) St ee r i ng gear .

Type . . . . . . . . . . . . . . . . . . . . Recircula tin g ball n utManufacturer Ross GearPa rt nu mber . . . . . . . . . . . . . TE55030Tiered toe-in . . . . . . . . . . . . 1/8 in.Steering wheel rotation

(lock-to-lock). . . . . . . . . . . . . . . . . . . . . . . . . 6 rotations

(7) B r a k e m a s t e r c y l i n d e r .

Manufacturer. . . . . . . . . . . . . . . . . . WagnerPa rt nu mber . . . . . . . . . . . . . . FE342240

(8) T r a n s m i s s i o n .

Type . . . . . . . . . . . . . . . . . . . . Aut oma ticManu factur er. . . . . . . . . . . . . . . . . Chr yslerSer ies . . . . . . . . . . . . . . . . . . . .G

rpm(9) Rear (dr ive) ax le .

Manufacturer Rockwell StandardPa rt nu mber . . . . . . . . . . . . . . TA267FSHDrop case reduction ratio . . . 3.0 to 1Differentia l redu ction r at io . . .5 4/6 to 1Brake type Drum hydraulicBrake shoe size . . . . . . . . . .12 in. x 2 in.

(10) B a t t e r y .

Type . . . . . . . . . . . . . . . . . . . Lead-acidRat ing . . . . . . . . . . . . . . . . . . .55 Amper e HourSpecific gravity of electrolyte

Fu ll cha rge (at 80F) . . . . . . 1.28050 percent cha rge (at 80F) 1.220Discha rged (at 80F) . . . . . . . . . . . . . . . . . . 1.160

(11) Torquing values for threaded fas teners .

Cylinder head bolts. . . . . . . . . . . . . . . . . . . . 65-70 ft-lbOther fas teners :

in ch . . . . . . . . . . . . . . . . . .8 t o 10 ft-lb5/16 inch . . . . . . . . . . . . . . 15 to18ft-lb

3/8 inch . . . . . . . . . . . . . . . . . . .10 to 35ft -lb7/16 inch . . . . . . . . . . . . . . 50 to 5.5ft-lb

in ch . . . . . . . . . . . . . . . . . . 7.5 to 85ft-lb9/16 inch . . . . . . . . . . . . . . l15 to 125 ft-lb

5/8 inch . . . . . . . . . . . . . . . . . .155 to 170ft -lb3/4inch . . . . . . . . . . . . . . . . . . 270 to 300 ft-lb

1-4


35/124

C H A P T E R 2

O P E R A T I N G I N S T R U C T I O N S

Section I. SERVICE UPON

2-1. G e n e r a l

When a new or used tractor is received by a using

organization, i t must be serviced as described in

p a r a g r a p h s 2 - 3 and 2 -4 be fo re any ope ra t i on i s

a t t e m p t e d .

2 - 2 . R e s p o n s i b i l i t i e s

Services upon receipt of a tractor are the respon-

s ib i l i t y o f t he u s ing o rgan i za t i on . These se rv i ces

must be performed by organizat ional main tenance

personnel. The operator may assist in these services

i f so d i rec ted by the commanding off icer

2-3. I n s p e c t i n g a n d S e r v i c i n g t h e T r a c t o r

a. Removal of Tape. Remove all tape used to seale n g i n e b r e a t h e r s a n d d i p s t i c k , f u e l t a n k v e n t ,

t o r q u e c o n v e r t e r b r e a t h e r , e n g i n e i n t a k e a n d a i r

cleaner, generator openings, and exhaust pipe.

b. R emoval of Preservat ives . R e m o v e p r e s e r -

va t i ve compound f rom a l l unpa in t ed me ta l su r -

faces , i nc lud ing p rope l l e r sha f t un ive rsa l j o in t s ,

wi th SD (so lvent , d ry-c leaning) . Since th is com-

pound is not a lubricant, use care to insure that it is

removed from all wearing surfaces.

c . S e r v i c i n g C o o l i n g S y s t e m . Check l eve l o f

c o o l a n t . I f l o w , a d d a p r e m i x e d s o l u t i o n o f 5 0

p e r c e n t a n t i fr e e z e c o n f o r m i n g t o F e d e r a l

Speci f ica t ion O-A-548 and 50 percent water .

d . Se rv i c i ng Engi ne C rankcase . D r a i n p r e s e r -

va t i ve o i l f rom c rankcase and re f i l l t o ope ra t i ng

level with oil specified in lubrication order.

e. Adjusting Engine Fan Belt. Adjust engine fan

bel t for inch deflec t ion .

f . S ervicing Fu el Tank . O pen fue l t ank shu to f f

va lve located underneath fuel tank . Fi l l t ank wi th

gasol ine .

g. Serv ic ing Bat tery . Remove seals from fi l le r

S e c t i o n I I . M O V E M E N T

2-5. D i s m a n t l i n g f o r M o v e m e n t

a. If the new worksite is near, the tractor may be

driven to the new location provided that the ground

or pavement is within the performance l imits for

the tractor. No dismantl ing or special preparation

is required under these condit ions. If the surface

o v e r w h i c h t h e t r a c t o r m u s t b e d r i v e n i s n o t

suitable, load the tractor onto a truck, t rai ler, or

o ther carr ier .

RECEIPT OF TRACTOR

caps . Remove ba r r i e r ma te r i a l and p re se rva t i ve

from bat tery terminals . Connect ba t tery cables to

b a t t e r y t e r m i n a l s . P o u r e l e c t r o l y t e ( s e p a r a t e l y

p a ck a g ed ) in t o ba t t e r y ce l l s u n t i l p la t e s a re

cove red .

Warn i n g : D o no t a l l ow e l ec t ro ly t e t o come

in con t ac t w i th sk in . A vo id b rea th ing fumes . I f

e l e c t r o l y t e c o m e s i n c o n t a c t w i t h s k i n , w a s h

i m m e d i a t e l y w i t h l a r g e q u a n t i t y o f w a t e r . I f

e l e c t r o l y t e s p l a s h e s i n e y e s , w a s h i m m e d i a t e l y

w i t h l a r g e q u a n t i t y o f w a t e r a n d o b t a i n i m -

m e d i a t e m e d i c a l a s s i s t a n c e .

h . S erv ici n g T orq ue C on v e r t er a n d T r a n s -

mission. D r a i n p r e s e r v a t i v e o i l f r o m t o r q u ec o n v e r t e r a n d a u t o m a t i c t r a n s m i s s i o n . R e f i l l t o

opera t ing level wi th f lu id speci f ied in lubrica t ion

o r d e r .

i . Serv ic ing Drop Gear Case and Di f ferent ial .

Check level of lubricant . If low, add lubricant as

speci f ied in lubrica t ion order .

j . S e r v i c i n g H y d r a u l i c B r a k e S y s t e m . C h e c k

l eve l o f f l u id . I f l ow , add f l u id a s spec i f i ed i n

l u b r i c a t i o n o r d e r . R e m o v e b l o c k i n g f r o m b r a k e

pedal . Adjust brakes as described in paragraph 4-

56 .

k . S e r v i c i n g H a n d ( P a r k i n g ) B r a k e . A d j u s t

pa rk ing b rake a s desc r ibed i n p a r a g r a p h 4 - 5 5 .

l . Servicing Tires. Check p ressu re i n each t i re .

I n c r e a s e o r r e d u c e p r e s s u r e t o m e e t i n f l a t i o n

requ i remen t s (45 p s i f ron t and rea r ) .

2-4. I n s t a l l i n g S e p a r a t e l y P a c k a g e d I t e m s

a. Seat Cushion. Unpack seat cushion and install

i t in the sea t f rame.

b. Fire Extinguisher. Insta l l f i re ex t inguisher and

bra cket below and t o the left of the operat ors seat .

TO A NEW WORKSITE

b. I f t he t rac to r i s t o be moved to a d i s t an t

worksi te , p roceed as fo l lows:

(1) Load the tractor onto a truck, t rai ler, or

o ther carr ier .

Note. Two lifting holes (for insertion of cable hooks)are pr ovided at th e front an d rear of the tra ctor. When usingcables and hooks, be sure to provide packing or blocking

between cables and surfaces of the tractor to prevent damage tot h e p a i n t e d s u r f a c e s .

2-1


36/124

(2 ) Dra in gas o l ine f rom fue l t ank . tank and reconnect bat tery cables . Tractor is then

(3) Disconnect cables from battery terminals . ready for service.

Bat tery may be lef t mounted in t ractor .

2 - 6 . R e i n s t a l l a t i o n A f t e r M o v e m e n t

W hen t r ac to r a r r ives a t new works i t e , r e f i l l f ue l

Sect io n I I I . CO NT RO L S AND INST RUMENT S

2-7. G e n e r a lyou will use in operating the tractor. The controls

Th is s ec t ion fu rn i s hes you w i th i l lu s t r a t ions and and indicators are shown in figure 2.1.

information concerning the controls and indicators

2-2


37/124

Figure 2-1. Locat ion o f controls and indicators.

2-3


38/124

See Ch 3

2 - 8 . C o n t r o l s

/ Starter S witch. The starter switch is located in

t h e u p p e r l e f t c o r n e r o f t h e i n s t r u m e n t p a n e l .

Depressing the switch energizes the starter solenoid

which in turn causes the starter motor to crank the

eng ine . Th is con t ro l i s e f f ec t ive on ly when the

transmiss ion shif t lever is in the neutral pos i t ion.

Release the knob when the engine s tar ts .

Ignition Switch. The ignition switch is located

to the right of the starter switch on the instrumentpane l . Turn the s w i tch l ever to ON pos i t ion to

a c t i v a t e t h e e n g i n e i g n i t i o n s y s t e m p r i o r t o a t -

tempting to s tar t the engine. This switch also ac-

t ivates the electr ical c i rcui ts for the ins truments .

Turn the lever to OFF ps i t ion to s top the engine.

c . Headl i gh t Sw i t ch . The head l igh t s w i tch i s

located on the instrument panel to the right of the

ign i t ion s w i tch , T u r n t h e s w i t ch l e v e r t o ON

posi t ion to turn on the headl ights .

d. Rear Light Switch. The rear l ight switch is

located in the upper right corner of the instrument

p a n e l . P u l l t h e s w i t c h k n o b o u t t o t u r n o n r e a r

light. Push switch knob into turn off rear light,e. Brake Pedal. The b rake peda l i s loca ted on

the floor to the right of the steering column. Use

y o u r r i g h t f o o t t o d e p r e s s t h e b r a k e p e d a l t o

decrease forward or reverse speed. The stoplight on

the rear of the tractor will come on when the pedal

is depressed.

f . Accelerator Pedal. T h e a c c e l e r a t o r p e d a l i s

located on the floorboard to the right of the brake

pedal. Use your right foot on the accelerator pedal.

Depress ing the pedal causes an increase in engine

speed. Release pressure on the pedal to decrease

engine speed.

g. Transmission Shif t Lever. T h e t r a n s m i s s i o n

shift lever is locat ed to th e right of th e operat ors

s e a t . A l w a y s p l a c e t h e l e v e r i n t h e N ( n e u t r a l )

pos i t ion before at tempting to s tar t the engine. To

move the tractor forward, place the lever in D, 1, or

2 position. For reverse, place the lever in the R

pos i t ion.

h . P a r k i n g B r a k e L e v e r . T h e p a r k i n g b r a k e

lever is located t o the right of th e operat ors seat ,

c o n v e n i e n t f o r r i g h t - h a n d o p e r a t i o n . P u l l l e v e r

upward and back to apply the parking brake. Push

the lever forward and down to release the parking

b r a k e .

i . Steering Handwheel . T h e s t e e r i n g h a n d w h e e l

controls the direction of travel. Turn the handwheel

t o t h e r i g h t ( c l o c k w i s e ) t o m a k e a r i g h t t u r n ;

toward the lef t to make a lef t turn .

j. Horn Button. The horn button is located in the

c e n t e r o f t h e s t e e r i n g h a n d w h e e l . D e p r e s s t h e

b u t t o n t o s o u n d t h e h o r n .

k. Choke Control. The choke control is located

on the left side of the instrument panel. The normal

position of the control during tractor operation is all

2-4

the way in. Pull the choke control out when starting

the engine in cold weather . As engine warms up,

p u s h c o n t r o l a s r e q u i r e d f o r s m o o t h e n g i n e

opera t ion .

l. Seat Adjuster Lever. The seat adjuster lever is

l oc a t e d o n t h e l e f t s i d e o f t h e o p e r a t o r s s e a t .

Depress the lever toward the seat ; then you can

m ove the s ea t fo rward o r backward as des i r ed .

Release the lever to lock the seat in the selected

pos i t ion.

m. Pintle Release Cable. The opera to r s end o f

the pintle release cable is attached to the frame of

th e operators seat . A pull on t he cable will release

the pint le hook.

2-9. I n d i c a t o r s

a. Engine Oi l Pressure Gage. T h e e n g i n e o i l

pressure gage is located in the upper left corner of

the instrument panel. The gage dial reads from 0 to

60 psi. This gage registers to pressure of the engine

l u b r i c a t i n g o i l d u r i n g e n g i n e o p e r a t i o n . U n d e r

norm al operating speeds, the gage should read 45

to 55 psi. A higher pressure reading is normal when

the engine is operating cold. If the gage reading islow or excessively high, stop the engine and report

the condi t ion to the proper author i ty .

b . A m m e t e r . T h e a m m e t e r i s l o c a t e d o n t h e

ins trument panel to the r ight of the oi l pressure

gage. The ammeter indicates the amount of current

flowing to or from the battery. The dial reads from

-40 to +40 am peres . A m inus r ead ing ind ica tes

bat tery discharge. A plus reading indicates bat tery

c h a r g i n g . W h e n t h e e n g i n e i s f i r s t s t a r t e d t h e

a m m e t e r n e e d le s h o u l d m o ve f a r t o t h e ( in -

dicat ing high charging rate) . The needle should

drop back toward the center of the dial and remain

slightly on the plus side. With the engine idling and

the headlights on, the ammeter should read a minus

value. I f the ammeter shows a cons tant d ischarge

(even a slight amount), report the condition to the

p r o p e r a u t h o r i t y .

c. Engine Hour Meter. The engine hour meter is

located in the upper lef t corner of the ins trument

panel. The meter indicates the total hours of engine

o p e r a t i o n . T h e m e t e r c o n t a i n s n u m b e r w h e e l s

w h i c h i n d i c a t e h o u r s t o t h e n e a r e s t t e n t h o f a n

h o u r .

d . E n g i n e T e m p e r a t u r e G a g e . T h e e n g i n e

t e m p e r a t u r e g a g e i s l o c a t e d i n t h e l o w e r r i g h tc o r n e r o f t h e i n s t r u m e n t p a n e l . T h e g a g e r e a d s

f r o m 1 0 0 t o 2 2 0 d e g r e e s F , i n d i c a t i n g e n g i n e

c o o l a n t t e m p e r a t u r e . D u r i n g n o r m a l o p e r a t i o n

(after engine warmup) the gage should read 160 to

180 degrees . I f the gage f a i l s to s how any tem -

perature gain af ter normal warmup t ime or i f the

gage reads above 210 degrees F . , s top the engine;

and, repor t the condi t ion to the proper author i ty .

e. Fuel Gage. The fue l gage i s loca ted in the

l o w e r c e n t e r o f t h e i n s t r u m e n t p a n e l . T h e g a g e


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reg is ters the amount of gasol ine in the fuel tank . torque converter. The dial reads from 100 to 360

The dial is marked E, , , 3/4, and F. d e g r e e s F . A n y r e a d i n g b e l o w 2 5 0 d e g r e e s i s

f . T o r q u e C o n v e r t er T e m p e r a t u r e G a g e . T h e norma l . I f t he read ing exceeds 250 deg rees , s t op

torque converter temperature gage is located in the operation of the tractor immediately and report the

low er r i gh t co rne r o f t he i n s t rumen t pane l . The cond i t i on t o t he p rope r au tho r i t y .

gage indica tes the temperature of the f lu id in the

Section IV. OPERATION UNDER USUAL CONDITIONS

2-10. G e n e r a la. The in s t ruc t i on i n t h i s sec t i on a re fo r t he

information and guidance of personnel responsible

for the operation of the tractor.

b. T h e o p e r a t o r m u s t k n o w h o w t o p e r f o r m

every ope ra t i on o f w h ich t he t rac to r i s capab l e .

This section contains instructions on start ing and

s topp ing t he t rac to r , on ope ra t i on o f t he t rac to r ,

and on coordinating the basic motions to perform

the spec i f i c t a s k s f o r w h i c h t h e t r a c t o r w a s

designed. Since nearly every job presents a different

problem, you may have to vary the procedures to fit

the individual job.

2-11. S t a r t i n g t h e T r a c t o r

Note. Before the first startup on any particular day, per-form the daily preventive maintena nce services described in

paragraph 3-5.

a. Pul l up on the park ing brake lever (fig. 2-1).

T h i s w i l l s e t t h e p a r k i n g b r a k e a n d p r e v e n t t h e

t rac tor from ro l l ing .

b. I f necessa ry , ad ju s t t he opera to r s sea t for

comfortable reach of brake and accelerator pedals

w i th r i gh t foo t and comfo r t ab l e reach o f s t ee r ing

h a n d w h e e l w i t h h a n d s .

c . Se t t ransmiss ion sh i f t l eve r i n N (neu t ra l )posi t ion .

d . If engine is cold, pull choke control all the way

out .

e. D e p r e s s a c c e l e r a t o r p e d a l a p p r o x i m a t e l y

one third of total pedal travel .

f. Turn i gn i t i on sw i t ch l eve r t o O N pos i t i on .

g. D epress s t a r t e r sw i t ch bu t ton . W hen eng ine

star t s , re lease s tar ter swi tch but ton .

Cau t i on : D o n o t k e e p s t a r t e r s w i t c h b u t t o n

d e p r e s s e d c o n t i n u o u s l y f o r m o r e t h a n 3 0

s e c o n d s w h i l e t r y i n g t o s t a r t e n g i n e . I f e n g i n e

f a i l s t o s t a r t w i t h i n 3 0 s e c o n d s , r e l e a s e s t a r t e r

s w i t c h b u t t o n . A l l o w s t a r t e r m o t o r t o c o o l f o r a t

l e a s t t w o m i n u t e s b e f o r e a t t e m p t i n g t o s t a r t

e n g i n e a g a i n .

C a u t i o n : D o n o t d e p r e s s s t a r t e r s w i t ch

b u t t o n w h e n e n g in e i s r u n n i n g . I f op e r a t i n g

l o c a t i o n i s s o n o i s y t h a t a r u n n i n g e n g in e

c a n n o t b e h e a r d , v i su a l l y c h e c k fo r e n g i n e

o p e r a t i o n b e fo r e d e p r e s s i n g s t a r t e r s w i t c h

b u t t o n .

C a u t i o n : D o n o t r a c e e n g i n e w h e n c o l d .L a c k o f l u b r i c a t i o n o n i n t e r n a l p a r t s c a n c a u s e

r a p i d e n g i n e w e a r .

h . H old acce l e ra to r peda l s l i gh t l y dep ressed t o

obtain a steady fast idle engine speed, and al low

eng ine t o w arm up .

i. Immedia te ly af ter s tar t ing engine and during

warm up, check for normal readings of engine oil

pressure gage (para 2-9 a), ammete r (para 2-9 b ) ,

and engine temperature gage (para 2-9 d ) .

j. A s eng ine w arms up , g radua l ly push choke

control in. Continue to warm up engine until it will

run smoothly with choke control all the way in.

k . Check that engine hour meter (para 2-9 c) i s

ope ra t i ng .

l. Remove you r foo t f rom the acce l e ra to r peda l

and check t ha t eng ine se t t l e s i n to smoo th s low -

idling speed.

Note. Tractor may be star ted by pushing if the bat tery isdead. To start under these conditions, set sh ift lever in N

position a nd r elease brakes. With an assistant pushing tra ctorwith a nother vehicle, allow speed to reach a pproximat ely 15mph. Then shift lever into D position.

Note. If any difficulties or malfunctions are noted duringstarting, report the conditions to the proper authority.

2-12. D r i v i n g t h e T r a c t o r

a. Check fuel supply by noting fuel gage (para 2-

9 f) t o i n su re t ha t you have enough fue l t o ac -

compl i sh you r t a sk . Re fue l i f necessa ry .

b. Move the transmission shift lever into position

D, 1 or 2 for forward travel or into position R for

reverse t ravel .

Note. Use position D for normal forward driving andlight towing on level surface. Use 1, and 2 positions whenascending or descending steep grade unloaded or when towinghea vy load on level or gr ade.

c. Place right foot on accelerator pedal . Slowly

dep ress acce l e ra to r peda l w h i l e re l eas ing pa rk ingbrake. Continue to depress accelerator pedal unti l

t r a c t o r s t a r t s t o m o v e a n d a t t a i n s s a f e o p e r a t i n g

speed .

d . W hen app roach ing a scend ing o r descend ing

grade while operating in D or 1 position, shift to 2

posit ion as required.

e. D ur ing d r iv ing ope ra t i on , obse rve cond i t i ons

as follows:

2-5


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41/124

See Ch 3

2 -1 8 . O p e r a t i o n U n d e r R a i n y o r H u m i d

C o n d i t i o n s

a. I f t h e t r a c t o r i s n o t i n o p e r a t i o n a n d u n -

s h e l t e r e d , p r o t e c t i t w i t h a c a n v a s o r o t h e r

waterproof covering. Remove the cover during dry

periods. Corrosion of the metal may occur quickly

where paint is chipped or scratched.

b . I n s p e c t t h e t r a c t o r of t e n f or e x p o s e d ,

damaged or corroded metal surfaces and report the

cond i t ion to the p roper au thor i ty .

2-19. O p e r a t i o n i n S a l t W a t e r A r e a s

a. Wash the t ractor f requent ly with clean, f resh

water, Be especially careful to clean salt deposits

f rom e lec t r i ca l com ponen ts and w i r ing ,

b. C oa t e x p os e d m e t a l s u r f a c e s wi t h r u s t -

p roof ing m ate r ia l . Rem ove rus t im m edia te ly and

apply paint or o i l as appropr iate .

2-20. O p e r a t i o n i n S n o w o r M u d

a. While operating the tractor, be alert for sharp

drop offs or holes hidden beneath the mud or snow.

b. Sl igh t ly de f la ted d r ive whee l t i r es w i l l im -

prove traction in loose snow or mud. Reinflate tires

when back on s o l id g round ,

2-21. Operation in High Altitudes

a. See that the radiator pressure cap is on tight.

Check the f an be l t fo r t igh tnes s (p a r a 2 - 1 6 a ) .

E n g i n e o v e r h e a t i n g m a y o c c u r a t h i g h a l t i t u d eu n d e r h e a v y l o a d ,

b. E n g i n e p e r f o r m a n c e m a y b e i m p r o v e d b y

r e p l a c i n g t h e s t a n d a r d c a r b u r e t o r m a i n m e t e r i n g

jet with a 1 s ize lean je t when operat ing between

a p p r o x i m a t e l y 5 , 0 0 0 t o 1 0 , 0 0 0 f e e t a b o v e s e a

l e v e l ; a 2 s i z e l e a n j e t b e t w e e n a p p r o x i m a t e l y

10,000 to 15,000 feet, and a 3 size lean jet between

approx im ate ly 15 , 000 to 20 , 000 f ee t .

S e c t i o n V i . O P E R A T I O N O F A U X I L I A R Y M A T E R I A L U S E D I N

C O N J U N C T I O N W I T H T H E E Q U I P M E N T

2-22. F i r e E x t i n g u i s h e r ( D r y C h e m i c a l T yp e )

The dry chemical type fire extinguisher is effective

in areas where ambient temperature is 25F. and

above . I f w in te r ized (p res s u r ized w i th n i t rogen) ,

the f i re ext inguisher may be used in temperatures

below _ 2 5 F , T h e f i r e e x t i n g u i s h e r i s a 2

p o u n d , stored-pressure, lever-operated ex-

t inguisher .

2 . 23 . O p e r a t i n g E x t i n g u is h e r

a. Dis connec t the c lam p tha t s ecu res the ex -

tinguisher to its mounting bracket. Swing the clamp

open, and remove the ext inguisher .

b. Hold the ext inguisher upr ight and raise the

large locking handle to break the seal .

c. Aim the nozz le a t the bas e o f the f i r e and

depress the small operat ing lever with the thumb.

d. Direct the discharge at the base of the f i re

with a side to side sweeping motion.

2-24. M a i n t e n a n c e

W e i g h t h e f i r e e x t i n g u i s h e r e v e r y 6 m o n t h s .

Replace the ext inguisher i f the weight is less than

4 pounds, or the pressure is below 125 pounds,

The d ry chem ica l type f i r e ex t ingu is her w i l l be

s e r v i c e d a t i n s t a l l a t i o n l e v e l t h r o u g h R e p a i r a n d

Utilities facilities, with the filling agent supplied byl o c a l p r o c u r e m e n t t h r o u g h T r o o p S u p p l y C h a n -

nels . Refer to TB 5-4200-200-

2-7


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C H A P T E R 3

O P E R A T O R M A I N T E N A N C E I N S T R U C T I O N S

Section I . BASIC

3-1 . G e n e r a lTools , equipment , and repair par ts is sued with or

ISSUE IT EMS

a u t h o r i z e d f o r t h e t r a c t o r a r e l i s t e d i n t h e b a s i c

issue items lis t , appendix C.

Section II. LUBRICATION INSTRUCTIONS

3-2. G e n e r a l

Per iod ic lub r ica t ion o f the t r ac to r i s the r es pon-

s ibi l i ty of organizat ional maintenance, and detai led

lubr ica t ion information is contained in the

lubrication order, L O 10-3930-626-12. This section

contains information on lubrication which is the

responsibility of the operator. This lubrication must

be performed as conditions require.

3-3. D e t a i l e d L u b r i c a t i o n I n s t r u c t i o n s

a. General . Keep a l l lub r ican t s in c los ed con-

tainers and s tore in a c lean, dry place away f rom

external heat. Allow no dust, dirt , or other foreign

m a t e r i a l t o m i x w i t h t h e l u b r i c a n t s . K e e p a l l

l u b r i c a t i n g e q u i p m e n t c l e a n a n d r e a d y t o u s e .

b. Cleaning. Keep al l external par ts adjacent to

l u b r i c a t i n g p o i n t s c l e a n a n d f r e e o f l u b r i c a n t .

Befo re add ing lub r ican t , w ipe lub r ica t ing po in t s

free of dirt and grease. Use care to prevent foreign

m a t t e r f r o m e n t e r i n g l u b r i c a t i o n p o i n t s w h i l e

c l ea n i n g a n d a d d in g lu b r ica n t . Aft e r a d d in g

lubr icant , c lean away any spi l led lubr icant , again

taking care to prevent foreign matter from enteringa t l u b r i c a t i o n p o i n t .

c. Poin ts o f L u b r i c a t i o n . T h e p o i n t s o f

lub r ica t ion fo r wh ich the opera to r i s r es pons ib le

during day to day operation are shown in figure 3-

1. These points are limited to the engine crankcase

and the t ransmiss ion and torque conver ter .

3-1


44/124

See Ch 3

d . C h e c k i n g C r a n k c a s e O i l L e v e l a n d A d d i n g

Oil. Before daily startup, check the crankcase oil

level and add oil if required as follows:

(1) Pullout the oil level indicator (fig. 3-l) and

wipe with a clean cloth.

(2) Reinser t o i l level indicator f i rmly.

(3 ) Pu l l ou t o i l l eve l ind ica to r , and r ead o i l

level.

Note. The FU LL mar k on th e oil level indicator sh owsthe pr oper level after the engine h as been st and ing idle for a

few hours. For an engine that has been ru nning recently, thelevel will norma lly be slightly lower. This is due t o oil filling th eoil passages and filter. This oil will drain back into the crank-

case as t he engine sta nds idle. If the oil level is at or below theADD OIL mark as checked above, add one quart of oil.

4) Re ins e r t the o i l l eve l ind ica to r f i rm ly .

(5) If oil is required, remove the breather cap

from the crankcase fill tube, and pour one quart of

o i l in to the c rankcas e f i l l tube . Rep lace b rea ther

cap .

C a u t i o n : B e s u r e t h e o i l y o u a d d i s t h e

s a m e g r a d e a n d w e i g h t a s t h a t a l r e a d y i n t h e

c r a n k c a s e . I f i n d o u b t , c h e c k w i t h

o r g a n i z a t i o n a l m a i n t e n a n c e p e r s o n n e l .Caut ion: D o n o t o p e r a t e t h e t r a c t o r i f t h e

o i l l e v e l a s c h e c k e d a f t e r a f e w h o u r s o f s t a n d -

i n g i d l e i s b e l o w t h e A D D O I L m a r k .

Figure 3-1. Operator's daily service lubrication points.

3-2


45/124


46/124

See Ch 3

Chart 3-1. operators Troubleshooting

Malfunction Probable Cause Corrective Action

1. Engine will not crank . Bat ter y electrolyte level low.

2. Engine cranks but will not start. a. Improper star ting procedure.

b. Out of fuel.

3. Engine overheats. a. Obstruction in front of radiator.b. Coolant level low.c. Oil level low.

4. Tractor will not move in forwa rd Transmission oil level low.or reverse.

5.

6.

7.

Service batt ery ( para 3-15b)a. Check and follow operating

procedure (para 2-11).b. Fill fuel tan k.a. Remove obstruction. (para 3-11 a)

b. S ervice radiator (para 3-11 b)c. Service engine cran k case (para 3-

3(d)

Service t ran smission (para 3-3 e)

Transmission overheats. Tractor being overloaded or im- Reduce loads. Operate according to

properly operated. instructions (para 2-12, 2-15 thru

2-21).

Engine lacks power under load. Clogged air cleaner. Service air cleaner (para 3-12 b).

Difficult steering. Tires under inflated. Service tires (para 3-14).

Sect io n V . O PERAT O RS MAINT ENANCE O F T RACT O R

3-8. G e n e r a lT h e f o l l o w i n g p a r a g r a p h s d e s c r i b e t h e r e s p o n -

sibilities of the operator in maintaining the tractor.

These responsibilities are limited to servicing the

following:

a. Engine. Refer to p a r a g r a p h 3 - 9 .

b . T r ans m is s ion . Refer to p a r a g r a p h 3 - 1 0 .

c. Radia tor . Refer to p a r a g r a p h 3 - 1 1 .

d. Air Cleaner. Refer to p a r a g r a p h 3 - 1 2 .

e. Fuel Tank. Refer to p a r a g r a p h 3 - 1 3 .

f. Tires and Tubes. Refer to p a r a g r a p h 3 - 1 4 .

g. Battery. Refer to p a r a g r a p h 3 - 1 5 .

3-9. E n g i n ea. Cleaning. Insure that the engine compartment

of the tractor is kept free of foreign objects and

materials. As often as conditions may require, wipe

off ignition cables, distributor cap, and porcelain

insulators of spark plugs with a clean cloth. Dust on

these parts can attract moisture which will result in

d i f f i c u l t s t a r t i n g a n d p o o r p e r f o r m a n c e . C l e a n

away lubr icants as descr ibed in paragraph 3-3 b .

b. Lubrication. Check crankcase oil level daily

(m ore o f ten under s evere opera t ing cond i t ions ) .

Add lubricating oil as required. Refer to paragraph

3-3 d .

3-10. T r a n s m i s s i o n

c o u n t e r c l o c k w i s e t o t h e b l e e d o ff p o s i t i o n .W h e n p r e s s u r e i n s y s t e m h a s r e l i e v e d , d e p r e s s

c a p a n d t u r n c o u n t e r c l o c k w i s e t o r e m o v e .

F a i l u r e t o h e e d t h i s w a r n i n g m a y r e s u l t i n

s e r i o u s p e r s o n a l i n j u r y f r o m r a p i d l y e s c a p i n g

c o o l a n t . I f s y s t e m i s e x t r e m e l y h o t , u s e a r a g t o

h o l d t h e r a d i a t o r c a p w h e n r e m o v i n g .

a. External Cleaning. Clean dir t , insects , t rash ,

and other foreign matter from front side of radiator.

Use compressed air or a stream of water under low

p re ss ur e d ir ect ed fr om t h e en g in e s id e of t h e

radiator . Clean radiator cap by spraying a s t ream

of wate r (ho t i f pos s ib le ) th rough ho les in va lve

cage while moving valve up and down with a blunt

wood stick.

b. Adding Coolant. Check level of coolant daily.

Add coolant, if required, using a premixed solution

of 50 p e r ce n t a n t i fr e e z e c on f or m i n g t o F e de r a l

Spec i f i ca t ion 0 -A-548 and 50 percen t wa te r . F i l l

r ad ia to r to w i th in one inch o f top o f f i l l e r neck .

Rep lace r ad ia to r cap s ecure ly .

c. Drain ing , Cleaning , and Ref i l l ing Radiator .

Dra in , c lean , and r e f i l l the r ad ia to r ( and coo l ing

s ys tem ) annua l ly as fo l lows (fig. 3-2 ):

(1) Drain system . Operate engine at a fast idle

unt i l normal operat ing temperature is reached. A

fast idle will stir Up any loose rust, scale, and other

i n c o o l i n g s y s t e m . P l a c e a n o b -

3 -11 . R a d i a t o r

Wa r n i n g : W h e n r e m o v i n g r a d i a t o r c a p w h e n

c o o l i n g s y s t e m i s h o t , t u r n c a p v e r y s l o w l y

struction in front of radiator, if required, to bring

engine temperature up to at leas t 180 degrees F .

S top the eng ine . Rem ove r ad ia to r cap , and open

dra in cocks - in eng ine b lock and r ad ia to r . A l low

cooling sys tem to drain completely .

3-4


47/124

Figure 3-2. Cooling system service points.


48/124

Caut ion: D o n o t p o u r c o l d c o o l a n t o r

w a t e r i n t o r a d i a t o r w h e n e n g i n e t e m p e r a t u r e i s

a b o v e 2 0 0 d e g r e e s F . C o l d c o o l a n t o r w a t e r ,

r e g a r d l e s s o f e n g i n e t e m p e r a t u r e , w i l l c l o s e t h e

t h e r m o s t a t a n d p r e v e n t c o m p l e t e fi ll in g o f

e n g i n e w a t e r j a c k e t s a n d p a s s a g e s . W h e n f i l l i n g

t h e s y s t e m w i t h c o l d c o o l a n t o r w a t e r , a l w a y s

o p e r a t e e n g i n e u n t i l n o r m a l op e r a t i n g t e m -

p e r a t u r e i s r e a c h e d ( t h e r m o s t a t o p e n s ) ; t h e n ,

a d d c o ol a n t o r w a t e r a s r e q u i r e d t o f i ll r a d i a t o r .

Wa r n i n g : R a d i a t o r c l e a n i n g c o m p o u n d

c o n t a i n s a c i d . Av o i d c o n t a c t w i t h s k i n . I f

c o n t a c t o c c u r s , w a s h a f f e c t e d a r e a i m m e d i a t e l y

w i t h b a k i n g s o d a s o lu t i o n o r w i t h l i b e r a l

q u a n t i t y o f w a t e r . I f c l e a n i n g c o m p o u n d

s p la s h e s i n t o e y es , w a s h im m e d i a t e ly w it h

l i b e r a l q u a n t i t y o f w a t e r a n d o b t a i n m e d i c a l a i d

a s q u i c k l y a s p o s s i b l e .

(2) Clean system. Close drain cocks on engine

b l o c k a n d r a d i a t o r . P o u r c l e a n i n g c o m p o u n d

c on f o r m i n g t o specif icat ion MIL-C-10597B

(ORD) in to radiator . F i l l radiator with water , and

install radiator cap. Start engine and operate at fastidle until temperature reaches at least 150 degrees

F. Allow engine to operate at least 30 minutes. Stop

engine. Remove radiator cap, and open drain cocks

on radiator and engine block. Allow system to drain

completely .

C a u t i o n : B e s u r e a f t e r u s i n g c l e a n i n g

c o m p o u n d t o f l u s h c o o l i n g s y s t e m t h o r o u g h l y

a s d e s c r i b e d b e l o w . C l e a n i n g c o m p o u n d

c o n t a i n s a s t r o n g a c i d w h i c h i f n o t c o m p l e t e l y

f l u s h e d a w a y m a y a t t a c k p a r t s o f t h e c o o l i n g

s y s t e m . D o n o t a t t e m p t t o f l u s h t h e s y s t e m b y

i n s e r t i n g a h o s e i n t o t h e r a d i a t o r w i t h t h e d r a i n

c o ck s o p e n a n d t h e e n g i n e r u n n i n g . T h i sp r o c e d u r e w i l l c a u s e t h e t h e r m o s t a t t o c l o s e

a n d s t o p c i r c u l a t i on o f w a t e r t h r o u g h t h e

e n g i n e .

(3 ) F l u s h s y s t em . C l os e d r a i n c oc k s o n

radiator and engine block. Fill cooling system with

clean fresh water, and i n s t a l l r a d i a t o r c a p . S t a r t

engine, and operate a t fas t id le unt i l temperature

reaches at least 180 degrees F. Continue to operate

e n g i n e f o r a t l e a s t f i v e m i n u t e s . S t o p e n g i n e .

Rem ove r ad ia to r cap , and open d ra in cocks on

radiator and engine block. Allow system to drain

com ple te ly . I f wa te r i s d i s co lo red to any ex ten t ,

repeat the f lushing operat ion.

(4) Fill system. Close drain cocks on radiator

and eng ine b lock . Pour coo lan t ( cons i s t ing o f a

p rem ixed s o lu t ion o f 50 percen t an t i f r eeze con-

forming to Federal Specif icat ion O-A-548 and 50

percent water) in to radiator . Ins tal l radiator cap.

Start engine, and allow to operate at fast idle until

t e m p e r a t u r e g a g e s h o w s n o r m a l o p e r a t i n g t e m -

perature . S top engine. Rem ove r ad ia to r cap and

check coolant level in radiator. If necessary, add

coolant until level is approximately one inch below

top of radiator f iller neck. Reinstall radiator cap.

3-12. A i r C l e a n e r

a. General. Clean the air c leaner e lement af ter

every 75 hours of t ractor operat ion under normal

cond i t ions . W hen opera t ing under ve ry dus ty o r

sandy conditions, clean the element daily.

b . R e m o v i n g , C l e a n i n g , a n d R e i n s t a l l i n g A i r

Cleaner Element .

(1 ) Rem ove w ing nu t and cover p la te f rom

front of air cleaner (fig. 3-3).

( 2 ) W i t h d r a w e l e m e n t f r o m b o d y o f a i r

cleaner.

(3 ) Tap e lem en t l igh t ly on f loo r o r bench ,

being careful not to deform the element. Blow dust

f rom p la ted e lem en t w i th com pres s ed a i r under

l ight pressure.

Caut ion: D o n o t d i r e c t h i g h p r e s s u r e a i r

s t e a m a t e l e m e n t . D o n o t w e t t h e e l e m e n t f o r

c l e a n i n g o r f o r a n y o t h e r r e a s o n .

(4) Reinstall element on air cleaner body with

cover plate and wing nut. Tighten wing nut firmly.

Note. Obtain a nd insta ll a new filter element a fterevery 800 hours of tra ctor operat ion.

3-6


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Figure 3-3. Servicing air cleaner.

3 - 1 3 . F u e l T a n k

Service fuel tank by filling with gasoline to meet

opera t ing r equ i r em en t . Dur ing co ld o r ex t r em ely

h u m i d w e a t h e r , k e e p t h e t a n k f i l l e d t o a s n e a r

capac i ty as p rac t i ca l to p reven t condens a t ion o f

m ois tu re in t ank .

3.14. T i r e s a n d T u b e s

I n s p e c t t i r e s w e e k l y f o r c u t s , w e a r , s i d e w a l l

damage, and imbedded foreign objects such as glass

or s tones. Remove foreign objects , Report damage

affecting serviceability of tires to proper authority.

Check in f la t ion p res s u re o f a l l t i r e s . Inc reas e o r

decrease pressure as required. Proper inf la t ion of

f ront and rear t i res is 45 ps ig .

3 - 1 5 . B a t t e r y

a. General . Bat te ry s e rv ice cons i s t s o f add ing

water to bat tery , keeping bat tery terminals c lean,

a n d r e c h a r g i n g b a t t e r y w h e n r e q u i r e d (fig. 3-4 ).

3-7


50/124

Figure 3-4. S ervicing battery.

b . A d d i n g W a t e r t o B a t t e r y . C h e c k l e v e l o f

electrolyte in battery daily by removing cell capsand observing level. Electrolyte should cover the

p la tes , I f l eve l i s low , add jus t enough d i s t i l l ed

water to cover plates. Do not add electrolyte when

level is low. Replace cell caps.

c. Cleaning Battery Terminals . W h e n c h e c k i n g

e lec t ro ly te l eve l in ba t t e ry , obs erve pos i t ive and

negative terminals for buildup of corrosion and for

presence of e lectrolyte on top of bat tery case. I f

corrosion or electrolyte is present, wash away with a

mixture of baking soda and water. A toothbrush or

o ther s m al l b rus h i s r ecom m ended fo r s c rubb ing

te rm ina l s and connec to r s on cab les . R ins e w i th

clean water and dry with cloth. To prevent further

co r ros ion , coa t ba t t e ry t e rm ina l s and cab le con-

nectors with petroleum jelly or heavy grease.

C a u t i o n : W h e n c l e a n i n g b a t t e r y c a s e o r

b a t t e r y t e r m i n a l s , b e s u r e c e l l c a p s a r e i n p l a c e

a n d t a k e o t h e r n e c e s s a r y p r e c a u t i o n s t o p r e v e n t

c l e a n i n g s o l u t i o n f r o m e n t e r i n g b a t t e r y c e l I s .

d . R e c h a r g i n g B a t t e r y . R o u t i n e o r p e r i o d i c

recharg ing o f the ba t t e ry w i l l no t be neces s a ry

u n d e r n o r m a l c o n d i t i on s . I f b a t t e r y r e q u i r e s

frequent recharging, a malfunction is present in the

e lec t r i ca l s ys tem . Repor t the cond i t ion to p roper

authority. The battery will require recharging if the

headlights have been left on while the tractor is idle

or if the battery has been severely discharged while

trying to start the engine. In most cases, if a booster

b a t t e r y h a s b e e n u s e d t o s t a r t t h e e n g i n e , t h e

d i s c h a r g e d b a t t e r y i n t h e t r a c t o r w i l l b e s u c -

cessively recharged during normal operation of the

tractor . Be sure to keep the bat tery ful ly charged

d u r i n g e x t r e m e l y c o l d w e a t h e r s i n c e t h e e l e c -

trolyte in a partially discharged battery is likely to

freeze. If any doubt exists about battery condition,check the specific gravity of the electrolyte with a

h y d r o m e t e r . W h e n u s i n g a h y d r o m e t e r h o l d t h e

bar re l ve r t i ca l w i th s u f f i c ien t e lec t ro ly te in the

barrel to lift the float. Take the reading at eye level.

Dis regard the curvature of the electrolyte a t the

point of contact with the float. The following chart

r e la tes hydrom ete r r ead ings to ba t t e ry cond i t ion .

Fu l l y c h a r g e d 1 . 2 75 t o 1 . 3 00H a l f c h a r g e d 1 . 2 20 t o 1 . 2 25L ow ch a r g e 1 . 1 60 t o 1 . 1 70Dan g e r o u s l y lo w 1 . 150 or be low

3-8


51/124

See Ch 3

See Ch 3

C H A P T E R 4

O R G A N I Z A T I O N A L M A I N T E N A N C E

Sect ion I . SERVICE UPO N

4-1. G e n e r a l

When a new or used tractor is received by a usingorganization, it must be serviced before operation is

attempted. Servicing for new tractor is described in

paragraphs 2-3 and 2-4. The procedures may have

to be modified for used tractors if different levels of

preservat ion packing have been used .

RECEIPT O F TRACTO R

4 - 2 . R e s p o n s i b i l i t i e s

Many o f t he i t ems requ i r i ng se rv i c ing mus t beperformed by organizational personnel having the

proper tools. Other items which do not require tools

m a y b e p e r f o r m e d b y t h e a s s i g n e d o p e r a t o r i f

d i rec ted to do so by the commanding off icer .

Section II. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT

4-3. T o ol s a n d E q u i p m e n t organ i za t i ona l ma in t enance l eve l fo r the t rac tor .

Tools, equipment, and repair parts issued with or 4 - 5 . M a i n t e n a n c e R e p a i r P a r t s

authorized for the t rac tor are l i s ted in the basicRepair parts

issue i tems l ist , appendix C.a n d e q u i p m e n t a r e l i s t e d a n d

illustrated in the repair parts and special tools list

4 - 4 . S p e c i a l T o o l s a n d E q u i p m e n t cove r in g o r ga n iza t ion a l m a i n t en a n ce f or t h i s

No special tools or equipment are required at the e q u i p m e n t . R e f e r t o T M 1 0 - 3 9 3 0 - 6 2 6 - 2 0 P .

4-6. G e n e r a l

Section III. LUBRICATION INSTRUCTIONS

This section contains lubrication instructions which

are supplemental to and not specifical ly covered in

the l ub r i ca t i on o rde r fo r t he t rac to r . Fo r cu r ren t

lubrica t ion order refer to LO 10-3930-626-12.

4-7. C a r e o f L u b r i c a n t s

R e f er t o p a r a g r a p h 3 -3 a f o r p r o p e r c a r e o f

lubricants.

4-8. C l e a n i n g L u b r i c a t i o n P o i n t s

Refe r t o p a r a g r a p h 3 - 3b for c leaning lubrica t ion

poin ts .

4-9. L u b r i c a t i n g F r o n t W h e e l B e a r i n g s

The front wheels and wheel hubs must be removed

w hen lub r i ca t i ng f ron t w hee l bea r ings . Re fe r t o

p a r a g r a p h 4 - 6 0 f o r r e m o v a l p r o c e d u r e . H a n d l e

bearing (cups, and cones and rollers) carefully top r eve nt d am a ge . D o n o t s p in b e a r i n g s be fo r e

cleaning. Wash al l bearing parts with SD (solvent ,

dry-cleaning), and dry with compressed air under

m o d e r a t e p r e s s u r e . P a c k c on e s a n d r o ll e r s

thoroughly with grease and apply grease liberally to

b e a r i n g c u p s . R e fe r t o p a r a g r a p h 4 - 60 f o r

reassembly instr uctions.

4 - 1 0 . A c c e s s t o R e a r D r a g L i n k S t e e r i n g

G e a r a n d B r a k e S h a f t

For access to the rear drag link, steering gear andbrake shaft for lubricating, remove the floor plates

from the tractor chassis as fol lows:

a. Remove co t t e r p in and w ashe r f rom end o f

acce l e ra to r peda l rod , a n d d i s e n g a g e r o d f r o m

pedal .

b. U n s c r e w p e d a l p a d f r o m b r a k e p e d a l r o d .

Remove peda l pad and l ock w ashe r .

c. R e m o v e h e x a g o n h e a d c a p s c r e w s w h i c h

secure floor plates to chassis.

d. Slide floor plates off chassis.

e. A f t e r l u b r i c a t i n g , r e i n s t a l l f l o o r p l a t e s b y

reve rs ing t he above p rocedu re .

4-11. A c c e s s t o B r a k e M a s t e r C y l i n d e r

For access to the master cylinder, pry out the plug

but ton located on the p la te ad jacent to the t rans-

mission shift lever. Be sure to replace the button

after servicing master cylinder.

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53/124


54/124


55/124


56/124

See Ch 3

S e c t i o n V I I . M A I N T E N A N C E O F P O S I T I V E C R A N K C A S E

V E N T I L A T I O N S Y S T E M

4-19. G e n e r a l

T h e p o s i t i v e c r a n k c a s e v e n t i l a t i o n v a l v e ( P C V

valve) is located on the right side of the engine

be low the i n t ake man i fo ld (fig. 4-2). An elbow

connects the valve to the intake manifold and a

connecting tube connects the valve to the engine

block .4-20. S e r v ic e a n d R e p l a ce m e n t

a. Disconnect connect ing tube (fig. 4-2) from

lower end of PCV valve, then unscrew valve from

elbow.

b. D isconnec t o the r end o f connec t ing t ube a t

rear of engine block, and remove tube.

c. Thoroughly flush valve in both directions and

f lu sh t ube w i th SD (so lven t , d ry -c l ean ing , Fed .

Spec. P-S-661 ). Shake valve and tube vigorously to

remove cleaning solvent .

d . After cleaning, gently shake valve to determine

that check is free.

Note. Replace PCV valve if check is not free or if valveshows evidence of intern al corrosion.

e. Screw valve onto manifold elbow, being sure to

observe proper f low di rec t ion

manifo ld) . Tighten secure ly .

Section

4-21. G e n e r a l

f. Connect tube to fitting at rear of engine block

a n d t o l o w e r e n d o f P C V v a l v e . T i g h t e n c o n -

nections securely.

( e n g i n e b l o c k t o

Figure 4-2.Positive crank case ventilation valve.

V I I I . M A I N T E N A N C E O F B A S I C E N G I N E

a. The engine is a six cylinder L-head unit, with

ba t t e ry i gn i t i on . The coo l ing sy s t em inc ludes a

front-mounted water pump driven by a V -beltfrom the crankshaft, a radiator mounted in front of

the engine , and a thermosta t in the cy l inder head

water outlet to maintain a constant efficient engine

operating temperature. The ignition system consists

of a coil , a conventional distributor, resistor spark

plugs, the necessary wiring and cabling, and radio

in t e r fe rence supp ress ion componen t s . The eng ine

fue l sy s t em inc ludes a mechan ica l fue l pump , a

veloci ty governor , a d o w n d r a f t s i n g l e b o r e c a r -

buretor with air cleaner, and the required fuel lines

and manifo ld ing . Cyl inder , spark p lug and bearing

numbering begins at the timing gear, or fan end, of

the engine .

b. This section of the manual covers those phases

o f b a s i c en gin e m ain t en a n ce wh ich a r e t h e

responsibil i ty of organizational maintenance.

4-22. C o m p r e s s i o n T e s t

a . Genera l . P e r f o r m a c o m p r e s s i o n t e s t t o

determine the need of in ternal repai rs before a t -

tempting tune-up procedures. This test will indicate

the condition of the piston rings and engine valves

An engine without fairly even compression in al

cy l i nde rs canno t be p rope r ly t uned .

b. Procedure.(1 ) W i th sh i f t l eve r i n N (neu t ra l ) pos i t i on ,

start engine. Allow engine to run at

f a s t i d l e u n t i l r e a c h i n g n o r m a l o p e r a t i n g t e m -

pe ra tu re .

(2) With engine warmed up, turn off ignit ion

sw i t ch and remove spa rk p lug w i re s f rom spa rk

p lugs . Remove fo re ign ma t t e r f rom a round spa rk

plugs by blowing out with compressed air. Loosen

spark plugs one complete turn. Reinstall spark plug

cables , and s tar t and run engine a t 1000 rpm for

a p p r o x i m a t e l y 1 0 s e c o n d s t o b l o w o u t c a r b o n

loosened by spa rk p l

tm 10-3930-626-12 united tractor model g40c nsn 3930-181-3217

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