IH-S-806 +

IInntteerr nnaattiioonnaallHHaarr vveesstteerr

Service Manualfor FARMALL806, 856,

1206, 1256 & 1456Volume 1 of 2

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF INTERNATIONAL HARVESTER OR IT’S SUCCESSORS. INTERNATIONAL HARVESTER 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.

Serv

ice

Man

ual

Paint Codes Ag Farmall Antique Red (to 1981)

IH………………………………………....99102R3 (Aerosol) IH……………………………………….….991010R2 (Quart) IH…………………………………………….B90882 (Gallon)

Ag White, Antique White (to 1981) IH………………………………………...991115R2 (Aerosol) IH……………………………………….….991116R1 (Quart) IH…………………………………………….B90888 (Gallon)

806 Starting Serial Numbers 1963……………………………………….………………………………………………….501 1964…………………………………………………………………………………………4709 1965……………………………………………………………………………………….15946 1966……………………………………………………………………………………….24038 1967……………………………………………………………………………………….34943

856 Starting Serial Numbers 1967…………………………………………………………………………………………7501 1968…………………………………………………………………………………………9854 1969……………………………………………………………………………………….19554 1970……………………………………………………………………..………………...32099 1971……………………………………………………………………………………….32420

1206 Starting Serial Numbers 1965…………………………………………………………………………………………7501 1966…………………………………………………………………………………………8626 1967……………………………………………………………………………………….12731

1256 Starting Serial Numbers 1967…………………………………………………………………………………………7501 1968…………………………………………………………………………………………8849 1969……………………………………………………………………………………….13140

1456 Starting Serial Numbers 1969……………………………………………………………………………………….10001 1970……………………………………………………………………………………….10405 1971……………………………………………………………………………………….14149

http://www.jensales.com/products/farmall-tractor-service-manual-ih-s-806.html

GSS-1346-G (Replaces GSS-1346-E)

361 and 407 SERIES DIESEL ENGINES and

FUEL SYSTEM (Roosa Master Model DB)

FOREWORD

The instructions and special tools shown in this Blue Ribbon Service Manual are for use by

International Harvester Dealers and their factory trained servicemen.

The specifications as listed in this manual are current as of the printing date. Due to

changes and improvements in our products, dealers are periodically issued service bulletins

to keep this manual up-to-date. We suggest you refer to the most recent information when

performing service work on this equipment.

International Harvester Factory Trained servicemen are best qualified to service I.H.

equipment.

LIBRARY FILING INFORMATION

1. File this Manual GSS-1346-G in Book 12 after Divider Tab GSS-1346. Remove Manual GSS-1346-E and destroy.

2. Enter the following information the Service Manual Index.

In the Tractor Engine and Fuel System Sections, Print or pre­ferably Type in, the Manual Description. Change suffix letter "E" to "G" after GSS-1346 in the Form Number column.

3. Destroy temporary Manual GSS-1058 (Turbochargers).

II

General Contents Page

Special Service Tools Required ....................................... IV

Standard Torque Chart ............................................ VI

Section

III

Section 1

ENGINE

CONTENTS

Specifications

Engine Checks

Valve Lash Adjustment. Valve Timing ...... . Compression Pressure .... .

Special Overhaul Instructions· ..................... .

Engine Removal .............................. .

Mounting the Engine to the Stand (361 and 407 Engines) .. .

Cylinder Head and Valves ..

Crankcase . ............ .

Connecting Rod, Pistons and Piston Rings

Piston Fit In Sleeve . . . . . • . . . . . . . . .

Cylinder Sleeves ................. .

Sleeve and Piston Fitting Procedures ...... . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rebuilt Diesel Engine Run-In Schedule ................... .

Crankshaft and Main Bearings ........................ .

Replacing Main Bearing Caps. • Rear Oil Seal ... . • . . . . . . . Wear Sleeve •.•••....•... Installation . . . . . . . . . . . . . . . . . . . . .

Timing Gear Train and Front Cover ............................... .

Crankshaft Front Oil Seal and Wear Sleeve. . . . . • . . . . . . . . .......•

Camshaft .................................... . ....... .

Lubrication System

Oil Pump ....... . Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Oil Jet Tubes ............................... . Oil Cooler •••.••.•.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling System

Water Pump ........•..•.•.......... . . . . . . . . . . . . . . . . . . . . . . .

1-1

Page

1-2

1-10 1-10 1-11

1-11

1-12

1-13

1-15

1-27

1-27

1-29

1-30

1-31 1-32 1-34

1-35

1-36 1-38 1-39 1-39

1-41

1-42

1-44

1-45 1-50 1-51 1-55

1-57

MOUNTING THE ENGINE TO THE STAND

D-361 Engine (Serial No. 22698 and below)

1. Install attaching plate FES 52- 7 on the engine as follows:

(a) Remove, as a complete assembly, the fuel filter bracket, fuel filters and the hose assemblies.

(b) Remove the oil level gauge assembly.

(c) Remove the oil filler elbow.

lIIust. 1-5. Engine attaching plate FES 52-7 mounted on 0-361.

NOTE: The two cap screws at the filler elbow location must be flush or below the surface of the attaching plate. This will eliminate interference when mounting to the engine stand.

Illust. 1-6. 0-361 mounted on engine stand FES 52.

2. Mount the engine in the engine stand (d) Install the attaching plate (Illust. 1-5). (Illust. 1-6).

DT-361 Engine (early model)

1. Modify attaching plate FES 52- 7 by grinding a relief on the inside (toward the engine) edge for the boss at the oil filler tube and turbocharger drain hose connector location.

2. Install the plate as follows:

1-13

(a) Remove, as an assembly, the fuel filter bracket, the filters and the hose assemblies.

(b) Disconnect the turbocharger oil drain tube assembly from the turbocharger and the drain hose from the connector. Remove the tube assembly from the engin~f

Section 2

FUEL SYSTEM (Roosa Master Model DB)

For Servicing of the Model RD Injection Pump, Refe:!;, to GSS-1345-B

CONTENTS

Specifications

Special Torques (Nozzle) .

Special Torques (Pump)

Inj ection Pump ..... .

Spring Specifications - D-36l and DT-36l Engines.

Spring Specifications - D-407 and DT-407 Engines.

Flow Bench Adjustments .....••...•......•

Inj ection Nozzles ..... .

Fuel Rator Specifications

General Description and Operation

Filter System •••••••••••..

Factors Affecting Pump and Nozzle Life

The Injection Pump (Roosa Master Model DB)

Trouble Shooting ..... .

Checks and Adjustments

General .......... .

Fuel Shut-Off Adjustment

Governor Linkage Hook Adjustment ..

Transfer Pump Pressure ....... .

High and Low Idle Speed Adjustment.

Throttle Linkage Adjustment ..

Transfer Pump Checks ..... .

Restriction in Suction Side of Fuel System •

Air Leaks in Suction Side of Fuel System ••

Inefficient Transfer Pump or Malfunctioning Pressure Regulator Valve ••••..•••••

2-1

. . . . . . . . . . . . . . . . . . . . . . . .

Page

2-3

2-3

2-4

2-6

2-7

2-8

2-10

2-10

2-12

2-12

2-12

2-20

2-28

2-28

2-28

2-30

2-30

2-31

2-31

2-31

2-31

2-31

Speed Advance Adjustment.

Fuel Rator Adjustments .............. .

Leaf Spring and Torque Screw Adjustments

Fuel Return Line Check ..... .

Pump Timing and Rotor Rotation

Iniection Pump Service

Pump Removal

Drive Shaft Removal.

Pump Disassembly ..

End Plate AsseIl1bly ....................................... .

Inspection and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

End Plate ••••

Transfer Pum.p ......................................•....

Hydraulic Head and Rotor ••.....•••••.•••••••.•.......•••..••

Governor •••••

Cam, Drive Shaft and Pump Housing

Pilot Tubes- ............................................ .

Throttle Shaft Bushing Replacement

Advance Mechanism·

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . End Plate · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Head and Rotor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Governor ••••••

Pump Drive Shaft and Inj ection Pump Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Iniection Nozzles

General Description

Nozzle Service · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nozzle Testing · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inspection and Repair. . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . Reconditioning.

Reassembly •.

· . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking Reconditioned Nozzle.

2-2

Page

2-32

2-33

2-33

2-36

2-36

2-37

2-38

2-38

2-46

2-48

2-48

2-48

2-48

2-49

2-51

2-52

2-52

2-54

2-54

2-54

2-54

2-60

2-62

2-65

2-66

2-69

2-69

2-70

2-71

2-72

2-72

Governor

1. Make certain that there is a shim on the metering valve under the arm. Install the spring on the metering valve, smaller end toward the arm. Install the assembly in the metering valve bore. Depress and rotate the valve several times to insure freedom of movement. If the valve sticks, lap it carefully with tallow. DO NOT sand or polish off the special surface treatment provided.

Illust.2·100. Installing governor linkage.

2. Place the governor arm in position in front of the thrust sleeve with the fork for the governor linkage hook facing the rear of the pump. Insert the pivot shaft, with one cap nut assembled loosely on it through the housing and pivot groove in the arm. See Illust. 2-100. a-ring seals are to be assembled on each end of the pivot shaft. The sharp edge of the pivot shaft is installed so it contacts the pivot point of the groove in the arm. As semble the opposite cap nut and tighten both cap nuts simul­taneously, to 20-25 inch pounds.

2-62

FESM-1342

IIlust.2-101. Installing governor link to metering valve.

3. Install the governor linkage hook over the pin on the metering valve arm. Check all of the governor parts again for freedom. See Illust. 2 -1 0 1.

IIlust.2-102. Installing governor spring assembly and

guide stud.

4. Assemble the governor spring, spacer, spring retainer, idle spring and idle spring guide and engage the end of the governor spring over the formed tabs of the governor arm. See Illust. 2-102. In­stall the guide stud with washer. inserting it through the governor spring assembly. Torque the guide stud to 110-115 in. Ibs.

Section 3

CONTENTS

SOLAR MODEL TC-3B TURBOCHARGER Page

Specifications ............................................... 3-2

Description ................................................. 3-3

General Maintenance and Cleaning Procedures ....................... 3-3

Turbine'and Compressor Cleaning p'rocedure . . . . . . . . . . . . . . . . . . . . . . . .. 3-4

Inspection Before Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4

Preliminary Inspection 3-4

Turbocharger Testing 3-5

Removal . ............... . 3-6

Inspection After Removal 3-7

Disassembly

Compressor Wheel. '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-8 Compressor Housing ......................................... 3-9 Turbine Wheel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-10 Nozzle Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-11 Radial Movement and End Play. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-11 Check End Play. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-12 Check Compressor Wheel, Radial Movement ............. .- . . . . . . . . . . .. 3-13 Removing Compressor Wheel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-14 Removing Turbine Wheel Shaft Assembly, Turbine Bearing and

Turbine Back Plate ......................................... 3 -14 Removing Compressor Seal Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-15 Removing Thrust Bearing and Thrust Washer. . . . . . . . . . . . . . . . . . . . . . . .. 3-16 Removing Compressor Bearing and Bearing Spacer. . . . . • . . . . . . . . . . . . . .. 3-16

Inspection of Internal Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-17

Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3 -21

Servicing of Air Induction System in Case

of Turbocharger Compressor Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-24

Installation ................................................. 3-25

3-1

Section 4

SCHWITZER MODEL 3LD TURBOCHARGER CONTENTS

Specifications . ....................... .

Description ......................... .

General Maintenance and Cleaning Procedures.

Turbine and Compressor Cleaning Procedure Inspection Before Removal

Preliminary Inspection . Turbocharger Testing.

Removal . ..

Disassembly

Inspection of Internal Parts. Reassembly . . . . . . . . . . . .

Servicing of Air Induction System in Case

of Turbocharger Compressor Failure

Installation ............. .

SPECIFICATIONS

Intake manifold pressure at 2400 rpm, 110 PTO horsepower (with new air cleaner elements) ...•..........

Intake manifold pressure at 1800 rpm (min. overload).

Exhaust manifold pressure at 2400 rpm.

Exhaust manifold pres sure at 1800 rpm.

.. . . . .

Page

4-1 4-2 4-3 4-3 4-4 4-4 4-5 4-6 4-7 4-9 4-11

4-13

4-14

9-tol2psi

7 to 10 psi

10 to 13 psi

5 to 8 psi

Inlet vacuum at rated load (ahead of Turbocharger) ... 20 to 25 inches H 20 (water manometer)

*Exhaust temperature - maximum - degrees F.

Compressor cover cap screw torque - ft. lbs.

Compressor wheel lock nut torque - ft. lbs.

Turbine housing clamp band nut torque - ft. lbs.

*Install pyrometer at the same location as gauge for checking exhaust pressure. Temperatures will rise with an increase in altitude, air cleaner restriction, bad nozzles, or inefficient turbocharger. It should not be allowed to exceed the maximum permitted temperature.

4-1

1100

. 5

13

10

Section 2

GASOLINE FUEL SYSTEM

CONTENTS

Specifications . ....

Page

. .. Refer to Foldouts 15 & 16

General Description • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • G • • • • • • • 2-6

Carburetors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-2

Operation ........ .

. . . . . . . . . .. ......... . Fuel Supply System

Idling System •.

Load System ••.

Starting System.

. . . .. . . . . . . . . . . . .

Liquid Level Check

Removal and Installation .

Inspection and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Throttle Body and Fuel Bowl

Throttle Plate .••.

Float Assembly •..

Fuel Needle Valve and Seat

Adjusting Screws and Seats .•••..•••.••••••.••

Venturi and Jets •••.•••••••...

Assembly and Adjustment ......... .

2-1

2-5

2-5

2-5

2-6

2-7

2-7

2-8

2-9

2-9

2-11

2-11

2-12

2-12

2-13

2-13

Section 3

LPG FUEL SYSTEM

CONTENTS

Specifications . ............................. .

Safety Precautions .......................... .

General Description

Operation

Fuel Tank and Fittings

Page

Foldouts 17 and 18

3-3

3-5

3-6

Fuel Filter Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-8

Carburetor and Regulator Vaporizer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-9

Engine Stopped - Fuel On • . . . • . . . • • . . . . . . . . . . • . . . . . . . . . . . • . .. 3-9

Starting . . . . • . . . . . • . • • . . . • . • . • . . . . . . . . . . . . • . . . . . . . • . . . .. 3-10

Idling. . . . . . . • • . . . . . . . . . . . . . . • • . . . . • • . . • . . . . . • . . . . . . . . .. 3-11

Part Throttle . . • . . . . . • • . . • . • . . . • • • . . . . . . . . . . . . . . . . . • . . . .• 3 -12

Full Throttle. . • . • . . . . • . . . . . . . . . . . . . • . . . . . . . . • . . . • • . . . . . .. 3-13

Trouble Shooting ........................... . 3-14

Regulator-Vaporizer Service

Removal and Installation ................. . 3-20

Inspection and Repair.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-21

Assembly and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-23

Regulator Testing 3-27

Carburetor Service

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Inspection and Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-32

Fuel Adjustments ........................................... , 3-35

3-1

., ....

Power Train Transmission

Differential Fianl Drive

FWA Rear Axle

GSS1342D

GENERAL The power train of the 706. 806 and 1206

Series Tractors is basically the same in its design. The only difference is the size of bearings and gears which will vary with models.

The tractors may be equipped with power shift torque amplifier, 540 or 1000 RPM independent powe r take -off (1206. 1000 RPM only). hydraulic system and high clearance attachments for 706 and 806.

All tractors will have a 9 gpm hydraulic pump located in the bottom of the clutch housing to provide fluid for the hydrostatic power steering. power brakes and for lu­brication of the power train. This pump will also supply fluid to the power shift clutches in the TA on tractors so equipped.

NOTE: Refer to GSS-1343 for complete information on all hydraulic and lubrication circuits.

CONTENTS

Introduction

Specifications

Torque Chart

General

Power Flow

Splitting the Tractor

Clutch Housing Assembly with TA and Speed Transmission

Torque Amplifier

Brakes 706 and 806

Removal and Disassembly. Reassembly .•.

1206. . . . . . . . . . . . . . . ...

Rear Axle and Bull Pinion Shaft (706 and 806) Removal and Disassembly. ~. Reassembly. . . . . . . . . . . .

Bull Pinion Be a ring s. • • • Rear Axle Assembly ••

Rear Axle and Bull Pinion Shaft (1206) Removal and Disassembly ... Reasse mbly. . . . . . . . . . . • . . . . . . . .

706, 806 and 1206 Rear Axle Bearing Pre-Load Adjustment

Page

2

5

7

3

11

12

13

15

20 21 22

23 23 24 24 24

26 28

29

Page Differential

Removal .................................................. 29 Inspection ................................................. 30 Reassembly .,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30 Adjusting Bearings ........................................... 30

Range Transmission

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 34 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 36 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 37 Countershaft and Reverse Idler Shaft ............................... 37,. Main Shaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39 Power Take-Off Driven Shaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39

Independent Power Take-Off 42

Belt Pulley Attachment ......................................... 48

High Clearance and Cotton Picker Drop Housings 50

All-Wheel Drive

General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 54 Description ................................................ 55 Wheel Ends ................................................ 56 Adjusting Steering stops and Toe-in ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 61 Differential ................................................. 61 Drive Line Service ............................................ 68 Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 69

Adiustments

Adjusting IPTO Operating Pressure ................................ 72 Adjusting Hydraulic Brake Pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 74 Parking Lock ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. 74 Range Transmission and Park Lock Adjustment (Foot Operated) . . . . . . . . . . . . . 77 Range Transmission and Park Lock Adjustment (Hand Operated) . . . . . . . . . . . . . 78 TA Operating and Control Linkage .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Spring Loaded Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Over-Center Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . 82 Speed Transmission Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Trouble Shooting . ..................................... . 84

4

Hydrostatic Power Steering

GSS1337C

FOREWORD

The instructions and special tools shown in this Blue Ribbon Service Manual are for use by International Harvester Dealers and their factory trained servicemen.

The specifications as listed in this manual are current as of the printing date. Due to changes and improvements in our products, dealers are periodically issued service bulletins to keep this manual up-to-date. We suggest you refer to the most recent information when performing service work on this equipment.

International Harvester Factory Trained servicemen are best qualified to service IH equipment.

CONTENTS Page

Introduction . . . . . . . . . 3

Principles of Operation .. 4

Control Valve 8

Manual Pump 12

Steering Cylinders (Double Acting) 20

Filling and Venting the System. 24

Unit Performance Testing .. 25

Trouble Shooting .... 25

Special Service Tools . 32

z

"'!~

y.

FOREWORD

GSS-1343·D

BASIC HYDRAULIC SYSTEM 706,806 and 1206 Series Tractors

Hydraulic Brakes, Power Steering,

Drive Selector and Lubrication

IMPORTANT When servlcmg late production 706 and 806 Tractors and all 1206 Tradors, see page 47.

LIBRARY FILING INFORMATION

1. File this Manual in Book 11 after Divider Tab GSS-1343.

2. Enter the following information in the Service Manual Index.

In the Tractor Brakes Section on page 19, and in the Tractor Hydraulics Section, page 25, Print or preferably Type in the Manual Description, Form Number, and the Book filed in.

CONTENTS

Introduction ...................... .

Glossary of Terms and Symbols ........ .

Specifications . . . . .

Torques ........................... .

Torque Chart ... . . . . . . . . . . . . . . . . . . . . . . . . .

How it Works

The complete System ........................... .

Hydraulic Supply and Control Circuit ................ .

Power Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . .

Power Hydraulic Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Power Braking •..........................•...... ' ...•..••.. Manual Braking .•.............•..........•........•.•...•.•

Drive Selector and Clutch Lubrication Circuit ........................ . Direct Drive Position •......................••.•••..••......• T A Drive Position •............................•............ Lubrication - During T A Shift .•....•.............••..•.•......• H ydr aulic Lock of Valve Spool . . . . . . • . . . . . • . . . . . . . • • . . . . . . . . . . . • Feathering •......•.....•....•...........•...•.••.......•• Clutch Dump Valve •.......•....••...••....•••..•••..•...•..

Clutch Housing and Transmission Lubrication System ................... . Clutch Lubrication Control •.••...........•..•.•............... Oil Cooler and Differential Lubrication System

Disassembly

General ................... .

Page

4

4

6

8

9

10

10

12

14 14 16

16 18 19 19 19 19 19

20 20 22

28

Multiple Control Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 28

Hydraulic Pump ............................................. 29

Farmall Power Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . .. 29

Power Brake Valves .......................................... 30

Inspection .. .. .. .. . .. .. .. .. . .. .. .. " . . .. .. . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 01 .. e. .. .. .... 31

Final Inspection - Mter Assembly ... . . . . . . . . . . . . . . . . . . . . . . . . . . • . .. 32

Reassembly .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. II .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. II .. II (I .. .. .. .... 32

Trouble Shooting . . . . .. . . . . . . . . . . . . . . . . .

Testing the Multiple Control Valve ......... .

3

33

44

INTRODUCTION

This manual was prepared in order to familiarize service personnel with the operating principles and proper servicing .techniques for the IH Load and Position Control Hitch and the AUxiliary Hydraulic System.

Information on the remainder of the Hydraulic Systems will be found in other Blue Ribbon Service Manuals.

Some of the illustrations shown are of cutaway units to better illustrate the features being discussed. Although the units have been cut away, the location of all parts remain the same.

IMPORTANT When servicing 1206 Tractors, see page 52.

CONTENTS

Page

Specifications ......... . 4

Torque Chart . ......... . 7

General Description . . . . . . . . . . 8

Principles of Operation ......... . 8

Changing from 3 Point to 2 Point Hitch or 2 Point to 3 Point Hitch . . . . . . . . . 24

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Checks and Adiustments . . . . . .. 31

Test Procedure . ............ . 35

Servicing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Load and Position Control Cylinder and Valve Units

Rockshaft ............................ .

Torsion Bar Assembly . . . . . . . . . . . . . . .

38

44

44

Control Quadrant, Levers and Control Linkage . . . . . . . . . . . . . . . . . . . . . . . . 44

Auxiliary Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Double-Acting Check Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Pumps and Filters (Refer to Service Manual GSS-1279)

3

Hand Book Torsion Bar Sensing

Hitch Adjustment

GSS1403

GSS-1342-D

GSS-1343-D

GSS-1344-D

GSS-1377

GSS-1346-E

Specifications

Service Manual Reference List

"Power Train" - 706, 806 and 1206

"Basic Hydraulic Systemt! - 706, 806 and 1206

"Load and Position Control Hitch and Auxiliary Hydraulic System" - 706, 806 and 1206

"D-310 Engine and Fuel System"

"D-361 and DT-361 Engine and Fuel System"

CONTENTS

Page

Engine . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . • . . . . . . . 4

Chassis . . . . . . . . . • • . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Hitch and Control Linkage Adiusting Procedure

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Adjusting Procedure. • . • . . . . . . . . • . . . . . . • . . . . . . . . . . . . . . . • . . . . . . . 7

Hydraulic Seat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Shift Linkage and Park Lock Adiustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

Adjustment Procedure :...:-...................................... 11

3