john deere 8430 | 8630 tractor service manual · component has to be removed and the best method...

John Deere

MODEL:

8430 & 8630 Volume 1 of 2

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF JOHN DEERE OR IT'S SUCCESSORS. JOHN DEERE AND IT'S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

JD-S-TM1143

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8430 and 8630 Tractors

TECHNICAL MANUAL 8430 and 8630

Tractors

TM1143 (01 NOV86) English

John Deere Tractors Works TM1143 (01 NOVa6)

LITHO IN U.S.A.

ENGLISH


8430 AND 8630 TRACTORS

TECHNICAL MANUAL TM-1143 (Feb-79)

CONTENTS

SECTION 10-GENERAL Group 5 - General Tractor Specifications Group 10 - Predelivery, Delivery and After-Sale

Services Group 15 - Tune-Up Group 20 - Lubrication Group 25 - Separation Group 30 - Specifications and Special Tools

SECTION 20-8430 ENGINE Group 5 - General Information, Diagnosis and

Tests Group 10 - Cylinder Head, Valves and Camshaft Group 15 - Cylinder Block, Liners, Pistons and

Rods Group 20 - Crankshaft, Main Bearings and Fly-

wheel Group 25 - Lubrication System Group 30 - Cooling System Group 35 - Specifications and Special Tools

SECTION 25-8630 ENGINE Group 5 - General Information, Diagnosis and

Tests Group 10 - Cylinder Head, Valves and Camshaft Group 15 - Cylinder Block, Liners, Pistons and

Rods Group 20 - Crankshaft, Main Bearings and Fly-

wheel Group 25 - Lubrication System Group 30 - Cooling System Group 35 - Specifications and Special Tools

SECTION 30-FUEL SYSTEM Group 5 - Diagnosing Malfunctions Group 10 - Air Intake System Group 15 - Diesel Fuel System Group 20 - Speed Control Linkage Group 25 - Specifications and Special Tools

SECTION 40-ELECTRICAL SYSTEM Group 5 - Information and Diagrams Group 10 - Electrical Diagnosis Group 15 - Delcotron Charging Circuit Group 20 - John Deere Charging Circuit Group 25 - Delco-Remy Starting Circuit Group 30 - John Deere Starting Circuit

Group 35 - Lighting Circuits Group 40 - Instrument and Accessory Circuits Group 45 - Remote Electrical Circuits Group 50 - Specifications and Special Tools

SECTION 50-POWER TRAIN Group 5 - Perma-Clutch@> Group 10 - Quad-Range Planetary Group 15 - Independent PTO Group 20 - Torque Divider Group 25 - Quad-Range® Transmission Group 30 - Differentials and Drive Shafts Group 35 - Final Drives Group 40 - Specifications and Special Tools

SECTION 60-STEERING AND BRAKES Group 5 - General Information

SECTION 70-HYDRAULIC SYSTEM Group 5 - General Information Group 6 - Hydraulic System Testing and Diag-

nosis Group 10 - Miscellaneous Hydraulic Components Group 15 - Hydraulic Pumps Group 20 - Power Steering Group 25 - Power Brakes Group 30 - Rockshaft and Implement Hitches Group 35 - Selective Control Valves, Breakaway

Couplers and Remote Cylinders Group 40 - Specifications and Special Tools

SECTION 80-S0UND-GARD BODY® Group 5 - Separation Group 10 - Air Conditioning System Group 15 - Heating System Group 20 - Seat Group 25 - Miscellaneous Components Group 30 - Specifications and Special Tools

SECTION gO-MISCELLANEOUS Group 5 - Wheels Group 10 - Specifications

All information, illustrations and specifications contained in this technical manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.

A-OO

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Tractors - 8430 and 8630 TM-1143 (Feb-79)

General 10 General Tractor Specifications 5-1

Section 10 GENERAL

CONTENTS OF THIS SECTION

Page

GROUP 5 - GENERAL TRACTOR SPECiFiCATIONS .............. 5-1

GROUP 10 - PREDELIVERY, DELIVERY, AND AFTER-SALE SERVICES

Predelivery Services .................... " 10-1 Delivery Services ........................ 10-3 After-Sale Services ..................... " 10-4

GROUP 15 - TUNE-UP Preliminary Engine Testing.. . . . . . . . . . . . . .. 15-1 Engine Tune-Up ....................... " 15-1 Engine Final Testing ................... " 15-3 Tractor Tune-Up . . . . . . . . . . . . . . . . . . . . . . . .. 15-3

GROUP 20 - LUBRICATION Lubrication Chart......................... 20-1 Engine Lubricating Oils ................. " 20-2 Transmission-Hydraulic Oil .............. " 20-2 Greases ............................... " 20-2 Storing Lubricants........................ 20-2

GROUP 25 - SEPARATION General Information ...................... 25-1 Drive Assembly

With Front Drive Support............... 25-2 Without Front Drive Support............ 25-4

Engine General Information.................... 25-6 Method "A" Separation................. 25-6 Method "B" Separation. . . . . . . . . . . . . . .. 25-16

Clutch Housing ......................... 25-20 Hinge

General Information ................... 25-26 Between Hinges . . . . . . . . . . . . . . . . . . . . .. 25-26 Front Hinge .......................... 25-31 Rear Hinge. . . . . . . . . . . . . . . . . . . . . . . . . .. 25-32

Torque Divider.......................... 25-36 Transmission ........................... 25-37

GROUP 30 - SPECIFICATIONS AND SPECIAL TOOLS

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-1 Special Tools... . . . . . . . . . . . . . . . . . . . . . . . .. 30-2

Group 5 GENERAL TRACTOR SPECIFICATIONS

Horsepower:* Maximum observed at PTO

8430 ....... : .................. 175 (130 kW) 8630 .......................... 225 (168 kW)

Engine: Type .......... 6-cylinder, in-line, valve-in-head,

diesel, turbocharged, and intercooled Engine Speeds:

Slow idle ........................... 800 rpm Working range ............. 1500 to 2100 rpm Maximum transport speed .......... 2300 rpm

Bore and stroke 8430 ........ 4.56 x 4.75 in. (11.6 x 12.1 em) 8630 ........... 5.12 x 5 in. (13.0 x 12.7 em)

Displacement 8430 ................. 466 cu. in. (7636 cm3)

8630 ......... , ..... 619 cu. in. (10 143 cm3)

Compression ratio 8430 ............................. 15.5 to 1 8630 .............................. '.15.4 t01

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Firing order ........................ 1-5-3-6-2-4 Valve clearance ........... 8430 .... see 20-10-5

8630 .... see 25-10-5 Injection pump timing . . . . . . . . . . . . . . . . . . . .. TDC

Lubrication System ......... Force-feed pres-surized with full-flow oil filter and by-pass

Fuel System: Type ........................... Direct injection Injection pump type. . . . . . . . . .. Multiple plunger,

in-line Air cleaner ........................... Dry type

with safety element

Cooling System: Type ......... Pressurized with centrifugal pump Temperature controlled by heavy-duty thermostats

8430 .......................... 2 thermostats 8630 .......................... 3 thermostats



R 25270N

A-Front Drive B-Engine C-Clutch Housing

D-Hinge E-Torque Divider F-Transmission

General Separation

10 25-1

Group 25 SEPARATION

G-Final Drive H-Sound Gard Body

Fig. 1-Basic Separation Components

GENERAL INFORMATION

Separation of the tractor may be subdivided into the following components (Fig. 1): Front drive (A), engine (B), front end, clutch housing (C}, front hinge, hinge pin, rear hinge, torque divider (E), transmission (F), final drive (G) and Sound-Gard body (H). Basic separation of these components will be explained within this group, except for the Sound-Gard body covered in Section 80, and final drive covered in Section 50.

A CAUTION: Always use the hinge lock .. bars, provided with the tractor, whenever

front or rear of tractor is raised. See operator's manual for installation of lock bars.

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It is important to determine beforehand, which component has to be removed and the best method to use in removing the component, in order to perform the required service in the shortest possible time. For example, it is possible to gain access to the engine clutch two different ways: (1) Removing engine and tractor front end from clutch housing, (2) Removing tractor front end, then removing engine from clutch housing. The method selected will be determined by the total service requirements for any particular job, and on personal choice.

Once a basic component has been removed from the tractor, refer to the appropriate section of this manual for detailed service information.



8430 ENGINE Basic Engine - 8430-6466A 20 General Information and Diagnosis 5-1

Section 20 8430 ENGINE


GROUP 5 - GENERAL INFORMATION AND DIAGNOSIS

Page

General Information """"""""""",,5-2 Diagnosing Engine Malfunctions"","""" 5-2

GROUP 10 - CYLINDER HEAD, VALVES, AND CAMSHAFT

General Information"",,"""""""" 10-1 Diagnosing Malfunctions"","""""'" 10-1 Preliminary Valve Checks""," , , , , , , , , " 10-2 Cylinder Head and Valves

Removal and Repair , , , , , , , , , , , , , , , , , " 10-2 Assembly "",',',""","',',',',", 1 0-4 Installation, , , , , , , , , , , , , , , , , , , , , , , , , , , " 10-4 Valve Clearance Adjustment" , , , , , , , , " 10-5

Camshaft Removal ",',",',',"',""""',"', 1 0-5 Repair , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , " 10-5 Installation, , , , , , , , , , , , , , , , , , , , , , , , , , , " 10-6

GROUP 15 - CYLINDER BLOCK, LINERS, PISTONS AND RODS

General Information ............ ,......... 15-1 Diagnosing Malfunctions , , , , , , , , , , , , , , , , " 15-1 Removal """""""""""""",'" 15-2 Repair

Pistons, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , " 15-2 Liners, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , " 15-4

Piston Pins"",""""""""""'" 15-4 Rods"""""""""""""""", 15-5 Block, , , " , , ,,", , " " , '" " " , " , " " 15-6

Assembly and Installation"",,""',.,'" 15-6

GROUP 20 - CRANKSHAFT, MAIN BEARINGS, AND FLYWHEEL

General Information , , , , , , , , , , , , , , , , , , , , " 20-1 Diagnosing Malfunctions , , , , , , , , , , , , , , , , " 20-1 Removal """""","","""""",' 20-2 Checking End Play""""""""""", 20-2

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Page Inspection and Repair

Flywheel ,"',""""',"""""""'" 20-3 Rear Crankshaft Oil Seal,

Housing, and Wear Sleeve, , , , , , , , , , , " 20-4 Main Bearings and Journals " , , , , , , , , , , " 20-4 Damper Pulley"",""""""""""" 20-5 Front Oil Seal and Wear Sleeve , , , , , , , , " 20-6

Installation , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , " 20-6

GROUP 25 - LUBRICATION SYSTEM General Information , , , , , , , , , , , , , , , , , , , , " 25-1 Diagnosing Malfunctions , , , , , , , , , , , , , , , , " 25-2 Checking Oil Pressure"""""""""" 25-2 Oil Filter and Housing Repair"",,""'" 25-2 Oil Cooler , , , , , , , , , , , , , , , , , , , , , , , , , , , , , " 25-3 Oil Cooler Bypass Valve Repair"",,"'" 25-3 Oil Pump Repair"",,""""""""'" 25-3 Installation, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,25-4

GROUP 30 - COOLING SYSTEM General Information"",,"""""""" 30-1 Diagnosing Malfunctions , , , , , , , , , , , , , , , , " 30-2 Radiator and Fan"",,""""""""" 30-2 Water Pump, , , , , , , , , , , , , , , , . , , , , , , , , , , " 30-2 Water Manifold and Thermostats , , , , , , , , " 30-4


Cylinder Head, Valves, and Camshaft"", 35-1 Cylinder Block, Liners, Pistons and Rods " 35-1 Crankshaft, Main Bearings and Flywheel", 35-2 Lubrication System , , , , , , , , , , , , , , , , , , , , , " 35-2 Cooling System , , , , , , , , , , , , , , , , , , , , , , , , " 35-3 Engine Break-In ".,',""""',',""',' 35-3 Special Tools, , , , , , , , , , , , , , , , , , , , , , , , , , " 35-4



8630 ENGINE Basic Engine - 8630-6619A 25 General Information and Diagnosis 5-1

Section 25 8630 ENGINE


GROUP 5 - GENERAL INFORMATION AND DIAGNOSIS

Page

General Information ........................ 5-2 Diagnosing Engine Malfunctions ............. 5-2

GROUP 10 - CYLINDER HEAD, VALVES, AND CAMSHAFT

General Information ...................... 10-1 Diagnosing Malfunctions .................. 10-1 Preliminary Valve Train Inspection. . . . . . . . . .. 10-1 Cylinder Head and Valves

Removal and Repair . . . . . . . . . . . . . . . . . .. 10-2 Assembly and Installation............... 10-5 Valve Clearance Adjustment . . . . . . . . . . .. 10-5

Camshaft Removal .............................. 10-6 Repair ................................ 10-6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-7

GROUP 15 - CYLINDER BLOCK, LINERS, PISTONS AND RODS

General Information ...................... 15-1 Diagnosing Malfunctions .................. 15-1 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-2 Repair

Pistons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-2 Liners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-4 Piston Pins............................ 15-5 Rods .................................. 15-6

Assembly and Installation ................. 15-7

GROUP 20 - CRANKSHAFT, MAIN BEARINGS, AND FLYWHEEL

General Information ...................... 20-1 Diagnosing Malfunctions .................. 20-1 Checking End Play....................... 20-2 Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-2

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Page Inspection and Repair

Crankshaft and Flywheel ............... 20-2 Main Bearings and Journals . . . . . . . . . . .. 20-2 Rear Crankshaft Oil Seal, Housing,

and Wear Sleeve . . . . . . . . . . . . . . . . . . .. 20-3 Damper assembly... . . . . . . . . . . . . . . . . . .. 20-5 Front Oil Seal and Wear Sleeve . . . . . . .. 20-5

Assembly ........ , ................ " ..... 20-6 Installation ............................... 20-8

GROUP 25 - LUBRICATION SYSTEM General Information ...................... 25-1 Diagnosing Malfunctions .................. 25-2 Oil Pressure Regulating Housing Repair. . . . .. 25-3 Oil Pump Repair . . . . . . . . . . . . . . . . . . . . . . . .. 25-3 Assembly ........................ " ...... 25-5

GROUP 30 - COOLING SYSTEM General Information ...................... 30-1 Diagnosing Malfunctions .................. 30-2 Radiator and Fan . . . . . . . . . . . . . . . . . . . . . . .. 30-2 Water Pump . . . . . . . . . .. . . . . . . . . . . . . . . . . .. 30-2 Water Manifold and Thermostats . . . . . . . . .. 30-4


Cylinder Head, Valves, and Camshaft ..... 35-1 Cylinder Block, Liners, Pistons

and Rods ............................. 35-2 Crankshaft, Main Bearings and

Flywheel .............................. 35-3 Lubrication System .. . . . . . . . . . . . . . . . . . . . .. 35-3 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . .. 35-3 Engine Break-In.......................... 35-4 Special Tools ............................ 35-5



8630 ENGINE Basic Engine - 8630-6619A 25

Piston Cooling Orifices

Fig. 12-Piston Cooling Orifice

Check each piston cooling orifice (Fig. 12) for plugged or damaged condition. An orifice failure could cause damage to pistons, piston pins, rod pin bushings, and liners. Replace orifices as necessary. Tighten to 85 to 110 in-Ibs (9.60 to 12.43 Nm).

ASSEMBLY AND INSTALLATION Liners

Fig. 13-lnstalling Cylinder Liner

Be sure liner bore in cylinder block is clean. First, install liner without O-rings and secure with cap screws and washers. Check liner height in several places.

If installation is in new cylinder block, the height of the liner should be 0.001-0.004 inches (0.025-0.102 mm).

If installation is in used cylinder block, the height of the liner should be 0.000-0.004 inches (0.000-0.102 mm).

NOTE: Install liner with the "L-L" or "H-H" mark toward the front of the engine.

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Cylinder Block, Liners, Pistons, and Rods 15-7

Install O-rings in grooves in bore and packing on cylinder liner. Apply AR54749 Lubricating Soap to 0-rings and packing.

Work liners in place by hand and seat with wood block and hammer (Fig. 13).

NOTE: Cylinder liner will protrude above the cylinder block more than normal due to uncompressed packing.

Piston and Rod Assembly

Be sure identification marks on piston and rod are in the same position as they were at time of disassembly.

Use a JOE-94 Ring Expander to install rings in their respective grooves.

NOTE: New rings are furnished with the correct end gap; therefore, filting to the liner is not necessary.

Install expander in oil ring groove. Install the oil ring on the piston with the expander to the top of the piston. Position oil ring gap opposite expander gap.

Coat pistons, liners, and JOE-97 ring compressor (Fig. 12) with engine oil.

Fig. 14-lnsta/ling Piston

Stagger ring gaps on piston and carefully slide ring compressor over piston. Carefully place ring compressor, with piston and rod, over liner. With piston and rings centered, push piston into liner.

NOTE: Be sure the words "front" on head of piston and rod face front of engine.

Apply engine oil to bearing inserts and crankshaft rod of journals. Small tangs on each half of the inserts must fit in recesses in rod and cap.



Fuel System 30 Diagnosing Malfunctions 5-1

Section 30 FUEL SYSTEM


GROUP 5 - DIAGNOSING MALFUNCTIONS ..... 5-1

GROUP 10 - AIR INTAKE SYSTEM Pre-Cleaner ............................. , 10-1 Aspirator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 0-2 Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-3 Restriction Indicator Switch. . . . . . . . . . . . . . .. 10-3 AiResearch Turbochargers . . . . . . . . . . . . . . .. 10-4 Schwitzer Turbochargers . . . . . . . . . . . . . . . .. 10-18 Intercoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-30 Ether Starting Aid . . . . . . . . . . . . . . . . . . . . . .. 10-33

GROUP 15 - DIESEL FUEL SYSTEM General Information ..................... . Fuel Tanks ............................. . Fuel Tank Venting ....................... . Fuel Gauge Sender ..................... . Fuel Supply Pump ....................... . Fuel Check Valve ....................... .

GROUP 15 - DIESEL FUEL SYSTEM (Cont'd) Bleeding Fuel System .................... 15-6 Fuel Injection Pump...................... 15-6 Aneroid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-10 Hydraulic Aneroid Activator............... 15-13 Overflow Valve ... , ......... '" .......... 15-15 Fuel Injection Nozzles ................... 15-16

GROUP 20 -' CONTROL LINKAGE Speed Control Linkage ................... 20-1 Foot Throttle Linkage..................... 20-3 Starting Fuel Control Linkage ............. 20-4 Diesel Fuel Shut-Off Control .............. 20-7


Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25-1 Special Tools ............................ 25-4

Fuel Filters ............................. .

15-1 15-2 15-3 15-3 15-3 15-5 15-5

Group 5 DIAGNOSING MALFUNCTIONS

The following is a guide for diagnosing fuel system malfunctions. For specific diagnosis of fuel system components. refer to the groups which cover complete servicing.

Fuel Not Reaching Injection Nozzles

Filters clogged. Fuel line clogged or restricted. Fuel too heavy at low temperatures. Air in system. Low supply pump pressure.

Engine Starts Hard or Won't Start Air leak on suction side of system. Fuel too heavy at low temperatures. Injection nozzles faulty or sticking. Incorrect timing Governor is faulty or not operating. Water in fuel. Filters clogged. Injection pump return fuel line or' fittings restricted. Low cetane fuel. Starting fuel control linkage or aneroid activator not

working properly.

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Engine Starts and Stops Air in system. Filters clogged. Fuel lines clogged or restricted. Water in fuel. Injection pump return fuel line or fittings

restricted.

Erratic Engine Operation

Filters clogged. Air leak on suction side of system. Fuel too heavy at low temperatures. Injection nozzles faulty or sticking. Fuel lines clogged or restricted. Incorrect timing. Governor faulty or not operating. Water in fuel. Injection pump return fuel line or fittings restricted. Low cetane fuel. Injection nozzle return lines clogged.



Electrical System 40 Information and Diagrams 5-1

Section 40 ELECTRICAL SYSTEM


Page

GROUP 5 - INFORMATION AND DIAGRAMS Precautions ................................ 5-2 Batteries .................................. 5-2 Circuit Breakers ............................ 5-3 Accessory Relay ........................... 5-5 Key Switch ................................ 5-5 Wiring Changes During Production ........... 5-6 Wiring Diagrams ........................... 5-6 Bulkhead Connector . . . . . . . . . . . . . . . . . . . . .. 5-13 Harness Replacement .................... 5-14

GROUp· 10 -. ELECTRICAL SYSTEM DIAGNOSIS Electrical Diagnostic Kit ................... 10-1 Electrical System Diagnosis . . . . . . . . . . . . . .. 10-2

GROUP 15 - DELCOTRON CHARGING CIRCUIT General Information ...................... 15-1 How the System Works. . . . . . . . . . . . . . . . . .. 15-1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-4 Removal ................................ 15-5 Disassembly ............................. 15-5 Repair .................................. 15-6 Assembly ............................... 15-10 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-10

GROUP 20 - JOHN DEERE CHARGING CIRCUIT General Information ...................... 20-1 How the System Works. . . . . . . . . . . . . . . . . .. 20-1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-4 Removal ................................ 20-5 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-5 Repair .................................. 20-6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-12

GROUP 25 - DELCO-REMY STARTING CIRCUIT General Information ...................... 25-2 How the System Works. . . . . . . . . . . . . . . . . .. 25-2 Starter Removal. . . . . . . . . . . . . . . . . . . . . . . . .. 25-5 Tests Before Disassembly ................. 25-5 Disassembly and Repair .................. 25-8 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25-25

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Page

GROUP 30 - JOHN DEERE STARTING CIRCUIT General Information ...................... 30-2 How the System Works. . . . . . . . . . . . . . . . . .. 30-2 Starter Removal. . . . . . . . . . . . . . . . . . . . . . . . .. 30-4 Tests Before Disassembly. . . . . . . . . . . . . . . .. 30-4 Disassembly and Repair . . . . . . . . . . . . . . . . .. 30-6 Assembly ............................... 30-13 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-13

GROUP 35 - LIGHTING CIRCUITS General Information ...................... 35-2 Flood Lamps ............................. 35-6 Head Lamps and Tail Lamps. . . . . . . . . . . . .. 35-9 Turn Signals and Warning Lamps. . . . . . . . .. 35-9 Light Switch ............................ 35-10 Instrument, Indicator, and Console Lamps. 35-11 Dome Lamp ............................ 35-11 Bulb Replacement ....................... 35-12

GROUP 40 - INSTRUMENT AND ACCESSORY CIRCUITS

Instrument Cluster. . . . . . . . . . . . . . . . . . . . . . .. 40-2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 40-6

GROUP 45 - REMOTE ELECTRICAL CIRCUITS Electrical Remote Control . . . . . . . . . . . . . . . .. 45-1 Outlet Socket . . . . . . . . . . . . . . . . . . . . . . . . . . .. 45-5

GROUP 50 - SPECIFICATIONS General Information ...................... 50-1 Delcotron Charging Circuit ................ 50-2 John Deere Charging Circuit .............. 50-2 Starting Circuit . . . . . . . . . . . . . . . . . . . . . . . . . .. 50-3 Lighting Circuits. . . . . . . . . . . . . . . . . . . . . . . . .. 50-5 Instrument Circuits ....................... 50-5 Accessory Circuits. . . . . . . . . . . . . . . . . . . . . . .. 50-6 Special Tools ............................ 50-7



Power Train 50 Perma-Clutch 5-1

Section 50 POWER TRAIN


Page

GROUP 5 - PERMA-CLUTCH General Information ........................ 5-2 Perm a-Clutch Operating and

Lubricating Circuit ........................ 5-2 Diagnosing Malfunctions .................. 5-10 Testing ................................. , 5-11 Operating Piston Housing and

Clutch Valve Housing Removal ...................... , ....... 5-12 Repair ................................ 5-14 .. Assembly ............................. 5-17 ' Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-18

Clutch Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-19 Repair ................................ 5-19 Assembly ............................. 5-20 Installation and Adjustment. . . . . . . . . . . . .. 5-23 Rod Adjustment ....................... , 5-25

Clutch Oil Pump Drive Gear. . . . . . . . . . . . . .. 5-26

GROUP 10 - QUAD-RANGE PLANETARY General Information ....................... 10-2 Diagnosing Malfunctions ................. , 10-5 Testing ................................. , 10-5 Repair

Removal .............................. 10-6 Disassembly and Inspection ............. 10-9 Assembly ............................ 10-13 Installation .......................... " 10-16 Adjustment . . . . . . . . . . . .. . . . . . . . .. . . . .. 10-18

GROUP 15 - INDEPENDENT PTO General Information ........................ , 15-2

Diagnosing Malfunctions ................. , 15-4 Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-5 Removal ................................ 15-5 Repair .................................. 15-6 Assembly and Installation ................ 15-10

GROUP 20 - TORQUE DIVIDER General Information ...................... 20-1 Diagnosing Malfunctions .................. 20-2 Repair .................................. 20-2 Inspection and Assembly. . . . . . . . . . . . . . . . .. 20-3

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Page GROUP 25 - QUAD-RANGE TRANSMISSION

General Information ...................... 25-1 Diagnosing Malfunctions .................. 25-3 Removal ................................ 25-3 Repair .................................. 25-5 Assembly ................................ 25-7 Range And Speed Selector Lever Assembly

Rod and Bell Crank Design Removal and Repair .................. 25-18 Assembly and Adjustment. . . . . . . . . . . . .. 25-20

One-Piece Cable Design Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 25-22 Repair ............................... 25-23 Assembly and Adjustment. . . . . . . . . . . . .. 25-24

Transmission Oil Pump . . . . . . . . . . . . . . . . .. 25-27

GROUP 30 - DIFFERENTIALS AND DRIVE SHAFTS

Differentials Rear Differential

Removal . . . .. . . . . . . . . . . . . . . . . . . . . . .. 30-3 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-4 Assembly and Installation. . . . . . . . . . . .. 30-5

Differential Lock. . . . . . . . . . . . . . . . . . . . . . . . .. 30-8 Front Differential

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-11 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-12 Assembly and Installation . . . . . . . . . . . . .. 30-13 Draining, Filling and Checking

Front Differential Oil. . . . . . . . . . . . . . . .. 30-19 Drive Shafts

General Information ................... 30-20 Repair ............................... 30-21 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . .. 30-23 Timing Drive Shafts . . . . . . . . . . . . . . . . . .. 30-23

GROUP 35 - FINAL DRIVES General Information ...................... 35-1 Removal ................................ 35-1 Disassembly and Repair . . . . . . . . . . . . . . . . .. 35-2 Assembly and Adjustment. . . . . . . . . . . . . . . .. 35-7 Rolling Drag Torque ..................... 35-13 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 35-16


Specifications .. . . . . . . . . . . . . . . . . . . . . . . . . .. 40-1 Special Tools ........................... 40-13


50 Power Train 5-12 Perma-Clutch

Lubrication Flow Test

Check clutch oil pump output as instructed in Section 70, Group 15. This measures the oil which is delivered to the oil cooler and then returned for lubrication. Refer to Fig. 2 for lubrication flow schematic.

Oil Pressure Switch Test

A-D-01019AA Hand Pump 8-0-300 psi (0-25 bar)

Pressure Gauge

C-Ohmmeter D-Oil Pressure Switch

Fig. 13·.Testing Pressure Switch

Remove the oil p~essure switch (Fig. 8). Connect the switch to a hydraulic hand pump. Connect a 12-volt test lamp and battery across the switch leads.

The switch should open as the pressure is raised to 145 to 155 psi (999 to 1068 kPa) and close when the pressure is reduced to 115 to 125 psi (792 to 861 kPa).

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OPERATING PISTON HOUSING AND

CLUTCH VALVE HOUSING

Removal

Disconnect and remove the upper telescoping UjOint from the clutch output yoke while the tractor is in a straight position. After the U-joint is removed, then put the tractor in a sharp right turn.

Separate engine from clutch housing. Refer to Section 10, Group 25, for procedures.

A. CAUTION: Use necessary safety precau.. tions when performing separation. Use

support under sections when necessary.

A-Oil Lines B-PTO Rod

C-Clutch Rod D-Operatlng Arms

Fig. 14-Pressure Regulating Valve Housing (Late Model Shown)

Remove oil lines (A, Fig. 14) and operating rods (B) from pressure regulating valve housing. On some tractors the operating rods are secured to the operating arms by spring pins. Remove these spring pins to disconnect rods from arms. On other tractors the rods are secured to the operating arms by retaining rings (Fig. 15). The rods cannot be disconnected until the operating arms are removed from the operating arm shafts. Remove spring pin securing arms to shaft and remove arms.

Later tractors (Fig. 14) are headed pins and retainer pins to connect the operating rods to their arms.



Hydraulic System 70 General Information 5-1

Section 70 HYDRAULIC SYSTEM


Page

GROUP 5 - GENERAL INFORMATION General Information ........................ 5-3

GROUP 6 - GENERAL HYDRAULIC SYSTEM DIAGNOSIS AND TESTS

General Information ........................ 6-1 Safety Precautions ................... . ..... 6-1 Step-By-Step Diagnosis

Special Tools ............................ 6-2 How To Use Step Charts ................. 6-4 Heating Hydraulic Oil ..................... 6-5 Preliminary Checks ....................... 6-6 Tractor Charts ........................... 6-8

GROUP 10 - MISCELLANEOUS HYDRAULIC COMPONENTS

Reservoir and Filter ...................... 10-1 Hydraulic Oil Relief and Check Valves ...... 10-1 Pressure Control Valve ................... 10-4 Oil Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-5

GROUP 15 - HYDRAULIC PUMPS Clutch Oil and Oil Transfer Pump .......... 15-1

Operation ............................. 15-2 Diagnosis and Test. . . . . . . . . . . . . . . . . . . .. 15-3 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-3

Main Pump Operation ............................. 15-6 Diagnosis and Test. .................... 15-7 Removal and Repair ................... 15-8 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-9 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-12

GROUP 20 - POWER STEERING General Information ...................... 20-1 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-2 Diagnosing Malfunctions .................. 20-6 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20-7 Metering Pump. . . . . . . . . . . . . . . . . . . . . . . . . .. 20-7 Steering Valve .......................... 20-10 Steering Cylinders. . . . . . . . . . . . . . . . . . . . . .. 20-13

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Page GROUP 25 - POWER BRAKES

General Information and Operation ......... 25-1 Diagnosing Malfunctions .................. 25-2 Brake Cylinders, Plates and Disks ......... 25-3 Brake Valve ............................. 25-3

Adjustment ........................... , 25-6 Bleeding Brakes ....................... 25-7

Brake Accumulator . . . . . . . . . . . . . . . . . . . . . .. 25-8 Pre-charging Accumulator ............... 25-9 Accumulator Test .... . . . . . . . . . . . . . . . . .. 25-9

GROUP 30 - ROCKS HAFT AND IMPLEMENT HITCHES

General Information and Operation ........ , 30-1 Diagnosing Malfunctions .................. 30-8 Rockshaft .............................. 30-14 Rockshaft Valve Housing ................. 30-16 Console Levers . . . . . . . . . . . . . . . . . . . . . . . .. 30-20 Load Sensing Cylinder ................... 30-21 3-Point Hitch .......................... " 30-23 Final Rockshaft Installation . . . . . . . . . . . . . . . 30-25

GROUP 35 - SELECTIVE CONTROL VALVES, BREAKAWAY COUPLER AND REMOTE CYLINDER

General Information and Operation ......... 35-1 Diagnosing and Testing. . . . . . . . . . . . . . . . . .. 35-4 Removal and Disassembly ............... , 35-6 Inspection, Repair and Assembly .......... 35-8 Adjustment ............................. 35-10 Breakaway Coupler. . . . . . . . . . . . . . . . . . . . .. 35-11 SCV Installation ......................... 35-12 Remote Cylinder ........................ 35-12


General Information ...................... 40-1 Hydraulic System Diagnosis and Tests ..... 40-1 Reservoir, Valves and Oil Cooler ......... , 40-1 Hydraulic Pumps . . . . . . . . . . . . . . . . . . . . . . . .. 40-2 Power Steering .......................... 40-3 Power Brakes ........................... , 40-4 Rockshaft and Implement Hitches ......... , 40-4 Selective Control Valves ................. , 40-5 Special Tools ........................... , 40-7



Miscellaneous 90 Wheels 5-1

Section 90 MISCELLAN EOUS


Page

GROUP 5 - WHEELS General Information ........................ 5-1 Removal .................................. 5-1 Repair .............. , ..................... 5-1 Installation ................................. 5-2

GENERAL INFORMATION

Both the 8430 and 8630 tractor main drive wheels are of the cast disk type mounted on Rack and Pinion axles. When double wheels are used (either front or rear), the outer wheel may be a cast or steel disk type.

Fig. 1-Removing Snap Ring

To remove or change position of a rear wheel, follow the instructions given in the Operator's Manual. Use JOG-18 Snap Ring Tool to remove snap ring from axle. (See Fig. 1.)

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Page GROUP 10 - SPECiFiCATIONS ............. 10-1

Removal

Group 5 WHEELS

1. (Not Illustrated). Clean the axle with a steel brush.

2. (Not Illustrated). Position the tractor so that the rack on the axle is up.

3. (Not Illustrated). Jack up the tractor.

'R 2671.3NL .'.

Fig. 2-Removing Wheel

4. Use JOG-18 Snap Ring Tool to remove axle snap ring (Fig. 1).

5. Loosen the three special bolts approximately 3/8 in. (10 mm).


john deere 8430 | 8630 tractor service manual · component has to be removed and the best method...

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