Complete Repair Service Technical Manual for John Deere Tractors 7600, 7700, 7800, with all the workshop information to maintain, repair, service like professional mechanics.

John Deere 2WD or MFWD Tractors 7600, 7700 and 7800 workshop technical manual (repair) includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.

tm1500 - 7600, 7700 and 7800 tractors Technical Manual - Repair.pdf
tm1500 - 7600, 7700 and 7800 tractors Technical Manual - Repair.epub

Total Pages: 1,220 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English

MAIN SECTIONS
 Foreword
   Dealer Predelivery Service
   Quick Reference Specifications
   Safety
      Safety
   General Information
      General Information
   Engine
      Component Removal and Installation
      Engine Repair
   Fuel, Air Intake, and Cooling Systems
      Throttle Controls
      Diesel Fuel System
      Air Intake System
      Engine Cooling System
      Air Conditioning Condenser and Coolers
   Electrical
      Connectors
      Wiring Harness Routings
      Charging Circuit
      Starting Circuit
      Switches, Relays, and Solenoids
      Monitoring System
      Auxiliary Lighting and Electrical Components
      Convenience and Accessory Components
   Power Shift Transmission
      Component Removal and Installation
      PST Controls
      PST Transmission
      PST Reduction Gear Box
   PowrQuad PowrQuad is a trademark of Deere & Company. Transmission
      Component Removal and Installation
      PQT Controls
      PowrQuad PowrQuad is a trademark of Deere & Company. Transmission
      Creeper Transmission
      Range Box
   Drive Systems
      Component Removal and Installation
      Controls
      MFWD Clutch
      MFWD Axle
      Rear Diff-7600(-07567), 7700(-09103), 7800(-14055)
      Rear Diff-7600(07568-), 7700(09104-), 7800(14056-)
      Final Drive
      PTO
      Drive Lines
      Hydraulic Pump Drive
      Front PTO
   Steering and Brakes
      Hydrostatic Steering
      Steering Cylinders
      Brake Valve
      Brake Components
      Trailer Brakes
   Hydraulics
      Component Removal and Installation
      Controls
      Hydraulic Pump and Charge Pump
      Hydraulic System Valves
      Selective Control Valves and Couplers
      Hitch
      Row Guidance
      Remote Cylinder
      Bleed Hydraulic System
   Miscellaneous
      Component Removal and Installation
      Front Axle
      Hood
      Trailer and Pick-Up Hitch
   Operator Station
      Component Removal and Installation
      Controls
      Air Conditioning System
      Heating System
      Seat
      ROPS and Cab
   Dealer Fabricated Tools
      Fabricated Tools

tm1500 - 7600, 7700 and 7800 tractors

Table of Contents

Foreword

Dealer Predelivery Service

Quick Reference Specifications

Section 05: Safety

Group 05: Safety

Handle Fluids Safely-Avoid Fires

Prevent Battery Explosions

Prepare for Emergencies

Prevent Acid Burns

Handle Chemical Products Safely

Avoid High-Pressure Fluids

Park Machine Safely

Support Machine Properly

Wear Protective Clothing

Work in Clean Area

Service Machines Safely

Work in Ventilated Area

Illuminate Work Area Safely

Replace Safety Signs

Use Proper Lifting Equipment

Service Tires Safely

Avoid Harmful Asbestos Dust

Avoid Heating Near Pressurized Fluid Lines

Remove Paint Before Welding or Heating

Use Proper Tools

Dispose of Waste Properly

Live With Safety

Section 10: General Information

Group 05: General Information

General Specifications

Sealants and Adhesives Cross-Reference Chart

Glossary of Terms

Metric Bolt and Cap Screw Torque Values

Unified Inch Bolt and Cap Screw Torque Values

Section 20: Engine

Group 00: Component Removal and Installation

Special or Essential Tools

Service Equipment and Tools

Specifications

Repair Engine-Use CTM

Remove Engine

Install Engine in Repair Stand

Install Engine

Group 05: Engine Repair

Repair Engine-Use CTM

Access to Intake and Exhaust Valves

Access to Front Crankshaft Seal

Access to Rear Crankshaft Seal-PST or PQT W/Creeper

Access to Rear Crankshaft Seal-PQT W/O Creeper

Access to Camshaft

Access to Timing Gear Cover

Remove and Install Engine Valve Cover

Remove and Install Front Cooling Assembly

Section 30: Fuel, Air Intake, and Cooling Systems

Group 05: Throttle Controls

Specifications

Repair Engine-Use CTM

Adjust Hand-Foot Throttle With Mechanical Linkage

Group 10: Diesel Fuel System

Specifications

Fuel Tank System-Exploded View

Remove and Install Fuel Tank

Group 15: Air Intake System

Inspect and Service the Air Intake

Group 20: Engine Cooling System

Service Equipment and Tools

Specifications

Test Radiator and Cap

Remove and Install Radiator

Remove and Install Viscous Fan Drive

Inspect Belt Tensioner

Replace Belt Tension Mechanism

Fan Belt Routing- 7600

Fan Belt Routing- 7700 and 7800

Group 25: Air Conditioning Condenser and Coolers

Service Equipment and Tools

Remove Fuel-Hydraulic Oil Cooler/Condenser

Leak Test Fuel-Hydraulic Oil Cooler/Condenser

Install Fuel-Hydraulic Oil Cooler/Condenser

Section 40: Electrical

Group 05: Connectors

Service Equipment and Tools

Other Material

Using High-Pressure Washers

Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector

Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contact

Remove Connector Body from Blade Terminals

Replace (Pull Type) METRI-PACK METRI-PACK is a trademark of the Delphi Packard Electric System. Connectors

Replace (Push Type) METRI-PACK METRI-PACK is a trademark of the Delphi Packard Electric System. Connectors

Replace CPC CPC is a trademark of AMP Inc. , Large MATE-N-LOC MATE-N-LOC is a trademark of AMP Inc. and METRIMATE METRIMATE is a trademark of AMP Inc. Pin Type Connectors

Replace CPC CPC is a trademark of AMP Inc. Blade Type Connectors

Replace Small MATE-N-LOC MATE-N-LOC is a trademark of AMP Inc. Socket Connector

Replace Small MATE-N-LOC MATE-N-LOC is a trademark of AMP Inc. Pin Connector

Replace DEUTSCH DEUTSCH is a trademark of the DEUTSCH Company. Connectors

Install DEUTSCH DEUTSCH is a trademark of the DEUTSCH Company. Contact

Use Electrical Insulating Compound

Group 10: Wiring Harness Routings

Ground Point Locations

Cab Harness Routing- Power Shift Transmission

Cab Harness Routing- PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Cab Harness Routing- Power Shift and PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Open Station Harness Routing and Component Identification

Harness Routing and Component Identification- Power Shift Transmission

Harness Routing and Component Identification- PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Engine Harness Routing and Component Identification- 6068 Engine (7600 Tractor)

Engine Harness Routing and Component Identification- 6076 Engine (7700 Tractor)

Engine Harness Routing and Component Identification- 6076 Engine (7800 Tractor)

Group 15: Charging Circuit

Repair Alternator-Use CTM

Remove and Install Alternator

Group 20: Starting Circuit

Special or Essential Tools

Specifications

Repair Starter-Use CTM

Remove and Install Starter Motor

Replace Starter Circuit Relay

Replace Fusible Link

Replace Neutral Start Switch- PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Replace Neutral Start Switch- Power Shift Transmission

Replace Gear Encoder

Replace Switch Module

Group 25: Switches, Relays, and Solenoids

Specifications

Replace Air Conditioning Relays and Switches

Replace Air Conditioning High and Low Pressure Switches

Replace MFWD Solenoid

Replace Hitch Return and Hitch Pressure Solenoids

Replace Differential Lock and Rear PTO Solenoids

Hitch-Position Feed-Back Sensor Location

Replace Hitch Position Potentiometer Assembly

Replace Hitch Control Potentiometer and Switch

Replace Fuel Shut-Off Solenoid

Replace Electric Fuel Pump- 7700

Remove Electrical Switches and Sensors- PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Electrical Controls and Switches- Power Shift Transmission

Replace Sensors Front Valve Housing- Power Shift Transmission

Replace Brake Switch

Replace Ether Starting Aid Solenoid and Switch- 7700 and 7800

Replace PST Start-in-Gear Relays

Replace Load Center Fuses and Relays

Load Center Fuses, Relays, and Diodes- COMFORTGARD COMFORTGARD is a trademark of Deere & Company Cab (North American)

Load Center Fuses, Relays, and Diodes- Open Station (North American)

Load Center Fuses, Relays, and Diodes- COMFORTGARD COMFORTGARD is a trademark of Deere & Company (European)

Group 30: Monitoring System

Service Equipment and Tools

Other Material

Specifications

Replace Rear PTO Speed Sensor

Replace Hydraulic Oil Restriction Sensor

Replace Engine Oil Pressure Sensor

Replace Air Filter Restriction Indicator Sensor

Replace Engine Speed Sensor

Replace Engine Coolant Temperature Sensor

Replace Fuel Level Sensor

Replace Wheel Speed Sensor

Replace Radar Speed Sensor

Remove and Install Draft Link Sensor

Adjust Draft Link Sensor

Replace Power Shift Control Unit (PCU)

Replace Hitch Control Unit (HCU) And Central Control Unit (CCU)

Replace Transient Voltage Protector (TVP)

Remove and Install Display Module

Replace Display Module Bulbs

Replace Light Switch, Hazard Light Switch, and Audible Warning Alarm

Replace Multifunction or Washer Wiper Switch

Replace Multifunction Switch Wiring Harness

Group 40: Auxiliary Lighting and Electrical Components

Replace Seven-Terminal Outlet Socket- North American Version

Replace Seven-Terminal Outlet Socket- European Version

Group 45: Convenience and Accessory Components

Replace Pressurized Blower Motor

Replace Circulation Blower Motors

Replace Wiper Motor

Replace Thermo Starting Aid and Relay- 7600

Test Ground-Fault Interrupter- North American

Replace Transmission Cover Heater

Replace Hydraulic Charge Pump Heater

Row Guidance Component Identification

Replace Row Guidance Coupler Position Sensor

Remove and Install Row Guidance Probe Angle Position Sensor and Probe Rise/Lower Motor Relay

Remove Row Guidance Probe Motor

Wire Number and Color Codes

Section 50: Power Shift Transmission

Group 00: Component Removal and Installation

Special or Essential Tools

Other Material

Specifications

Sealing Instructions- Drive Train

Remove Drive Train

Install Drive Train

Remove Power Shift Transmission

Install Power Shift Transmission

Remove Reduction Gear Box

Install Reduction Gear Box

Group 05: PST Controls

Special or Essential Tools

Shift Console Access

Transmission Shift Control and Park Linkage

Park Linkage Adjustments

Remove Shift Control Assembly

Disassemble and Assemble Shift Control Assembly

Replace Encoder

Replace Switch Module

Replace Power Shift Control Unit- (PCU)

Replace Relays

Recondition Park Lock Linkage

Recondition Tow Disconnect

Electrical Controls and Sensors

Electrical Controls and Sensors

Wheel Speed Sensor

Remove and Install Thermal By-Pass Valve

Group 10: PST Transmission

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

General Repair Procedures- Power Shift Transmission

Transmission Components

Prepare Transmission for Repair

Remove Transmission Front Cover/Front Valve Housing

Remove Front Valve Housing

Front Valve Housing Valves

Transmission Front Cover Valves

Replace Traction Clutch Valve Shifter Lever Shaft Seal

Transmission Pump-Cross-Sectional View

Repair Transmission Pump

Install Front Valve Housing

Install Transmission Front Cover/Valve Housing Assembly

Repair or Replace Electro-Hydraulic Valves

Remove Clutch Pack Assembly

Clutch Pack Assembly-Cross-Sectional View

Disassemble Clutch Pack Assembly

Assemble Clutch Pack Assembly

Install Clutch Pack Assembly

Remove and Disassemble C LO-B HI Pack

Assemble and Install C LO-B HI Pack

Remove and Disassemble Input Planetary Carrier Assembly

Assemble and Install Input Planetary Carrier Assembly

Disassemble Output Housing Module and Remove Output Planetary Carrier

Output Planetary Carrier Assembly-Cross-Sectional View

Planetary Carrier Assembly-Exploded View

Disassemble Output Planetary Carrier Assembly

Assemble Output Planetary Carrier Assembly

Remove and Disassemble B5 Pack

Assemble and Install B5 Pack

Install Output Planetary Carrier and Assemble Output Housing Module

Group 15: PST Reduction Gear Box

Special or Essential Tools

Service Equipment and Tools

Specifications

General Repair Procedures- Reduction Gear Box

Remove Differential Drive Shaft

Differential Drive Shaft-Cross-Sectional View

Determine Cone Point Shim Pack and Install Differential Drive Shaft

Reduction Gear Shaft-Cross-Sectional View

Remove and Install Reduction Gear Shaft

Repair Lube Manifold- Early Version

Repair Lube Manifold- Later Version

Remove and Install Tow Disconnect

Replace Transmission Lock Return Spring

Remove and Install Transmission Lock

Section 55: Transmission

Group 00: Component Removal and Installation

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

Sealing Instructions- Drive Train

Remove Drive Train

Install Drive Train

Remove PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Install PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Remove Creeper Transmission

Install Creeper Transmission

Remove Range Box

Install Range Box

Group 05: PQT Controls

Special or Essential Tools

Shift Console Access

PowrQuad PowrQuad is a trademark of Deere & Company. Shift and Park Linkage Assembly

PowrQuad PowrQuad is a trademark of Deere & Company. Shift and Park Linkage Symptom/Cause Chart

PowrQuad PowrQuad is a trademark of Deere & Company. Shift and Park Linkage Adjustment

Shifter Cam Neutral Alignment

F-N-R Lower Linkage Inspection and Adjustment

F-N-R Upper Linkage Inspection and Adjustment

1-2-3-4 Speed Lower Linkage Inspection and Adjustment

1-2-3-4 Speed Upper Linkage Inspection and Adjustment

Park Rod Linkage Inspection and Adjustment

Range Shift Linkage Inspection and Adjustment

Shift and Park Linkage Final Checks and Adjustments

Remove Shift Control Assembly

Disassemble Shift Control Assembly

Repair Lower Shift Linkage

Repair Lower Park Lock Outer Linkage

Repair Lower Park Lock Inner Linkage

Creeper Control Lever

Electrical Controls and Sensors

Group 10: PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

General Repair Procedures- PowrQuad PowrQuad is a trademark of Deere & Company. Transmission

Transmission Serial Number Information

Major Transmission Components

Install Transmission in Repair Stand

Remove Transmission Front Cover/Front Valve Housing

Remove Front Valve Housing

Front Valve Housing Valves

Transmission Front Cover Valves

Traction Clutch Valve

Replace Traction Clutch Valve Shifter Lever/Shaft Seal

Replace Traction Clutch Valve Inner Arm/Shaft

Transmission Pump-Cross-Sectional View

Repair Transmission Pump

Install Front Valve Housing

Install Transmission Front Cover/Front Valve Housing

Remove Shift Control Valve Housing

Replace Forward-Reverse/Speed Selector Shifter Levers/Shaft Seals

Replace Forward-Reverse/Speed Selector Shifter Shafts/Shifter Arms

Shift Control Valve Housing Valves Serial Number (-10891)

Shift Control Valve Housing Valves Serial Number (10892-)

Modulator Valve-Cross-Sectional View

Planetary Housing Valves

Forward/Reverse Control Valve-Cross-Sectional View Serial Number (-10891)

Forward/Reverse Control Valve-Cross-Sectional View Serial Number (10892-)

Speed Selector Valve-Cross-Sectional View Serial Number (-10891)

Speed Selector Valve-Cross-Sectional View Serial Number (10892-)

Assemble and Install Shift Valve Housing- Serial Number (-10891)

Assemble and Install Shift Valve Housing- Serial Number (10892-)

Disassemble Planetary/Reverse Brake Housing Assembly

Recondition Input Planetary Carrier

Input Planetary Assembly-Cross-Sectional View

Disassemble Reverse Brake Housing Components

Reverser Carrier/Traction Clutch Assembly-Cross-Sectional View

Recondition Reverser Carrier/Traction Clutch Assembly

Disassemble Planetary Housing Components

Direct Drive Clutch Assembly-Cross-Sectional View

Recondition Direct Drive Clutch Assembly

Assemble Planetary Housing Components

Assemble Reverse Brake Housing Components

Assemble Planetary/Reverse Brake Housing Assembly

Group 15: Creeper Transmission

Service Equipment and Tools

Other Material

Specifications

General Repair Procedures- Creeper Transmission

Recondition Creeper Transmission

Shifter Components-Cross-Sectional View

Remove and Install Shifter Components

Creeper Transmission-Cross-Sectional View

Remove Input/Output Drive Shaft Assembly

Disassemble and Assemble Drive Shaft/Snubber Brake

Remove and Install Countershaft

Install Input/Output Shaft Assembly

Group 20: Range Box

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

30K and 40K Range Box

General Repair Procedures- Range Box

Remove and Disassemble Shifter Cover

Remove and Install Park Pawl

Reverse Interlock Shifter Shaft Components

Remove and Install Shifter Rails and Forks

Shifter Rails Interlock Components-Cross-Sectional View

Install Shifter Forks and Rails

Adjust Shifter Rails

Assemble and Install Shifter Cover

Remove Differential Drive Shaft

Differential Drive Shaft-Cross-Sectional View

Determine Cone Point Shim Pack and Install Differential Drive Shaft

Remove and Disassemble Input Shaft

Input Shaft-Cross-Sectional View

Assemble and Install Input Shaft

Adjust Input Shaft End Play

Section 56: Drive Systems

Group 00: Component Removal and Installation

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

Sealing Instructions

MFWD Axle Repair-Use CTM

Remove MFWD Clutch

Install MFWD Clutch

Remove MFWD Axle

Install MFWD Axle

Remove Rear PTO Assembly

Install Rear PTO Assembly

Remove Front PTO Assembly

Install Front PTO Assembly

Remove Final Drive

Install Final Drive

Group 05: Controls

Specifications

MFWD Switch

MFWD Solenoid

Differential Lock Switch

Differential Lock Solenoid

Repair Lower Park Lock Inner Linkage

PTO Switches

PTO Shift Lever

PTO Clutch Solenoid

PTO Speed Sensor

Group 10: MFWD Clutch

Special or Essential Tools

Service Equipment and Tools

Specifications

General Repair Procedures- MFWD Clutch

Disassemble MFWD Clutch

MFWD Clutch-Cross-Sectional View With Secondary Brake

MFWD Clutch-Cross-Sectional View Less Secondary Brake

Disassemble MFWD Clutch Pack

Assemble MFWD Clutch Pack

Assemble MFWD Clutch

Group 15: MFWD Axle

MFWD Axle Repair-Use CTM44

Group 20: Rear Diff-7600(-07567), 7700(-09103), 7800(-14055)

Special or Essential Tools

Service Equipment and Tools

Specifications

General Repair Procedures- Rear Differential

Remove Differential

Differential-Cross-Sectional View

Disassemble Differential

Assemble Differential

Adjust Differential Preload

Adjust Differential Backlash

Group 21: Rear Diff-7600(07568-), 7700(09104-), 7800(14056-)

Service Equipment and Tools

Specifications

General Repair Procedures- Rear Differential

Remove Differential

Differential-Component Identification

Differential-Cross-Sectional View

Disassemble Differential

Assemble Differential

Adjust Differential Preload

Adjust Differential Backlash

Group 25: Final Drive

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

General Repair Procedures- Final Drive

Remove Planet Pinion Carrier

Planet Pinion Carrier-Cross-Sectional View

Disassemble Planet Pinion Carrier

Planet Pinion Carrier-Exploded View

Assemble Planet Pinion Carrier

Rear Axle Housing and Shaft-Cross-Sectional View

Remove Axle Housing

Disassemble and Assemble Axle Housing

Disassemble and Assemble Axle Shaft

Install Axle Housing

Install Planet Pinion Carrier and Check Rolling Drag Torque

Group 30: PTO

Special or Essential Tools

Service Equipment and Tools

Specifications

General Repair Procedures- PTO

Clutch

Repair PTO

PTO Clutch-Cross-Sectional View

Remove and Disassemble PTO Clutch

Assemble and Install PTO Clutch

Remove and Disassemble Countershaft

PTO Countershaft-Cross-Sectional View

Assemble and Install

Two-Speed PTO Output Shaft-Cross-Sectional View

Shiftable PTO Output Shaft-Cross-Sectional View

Remove and Disassemble Output Shaft

Assemble and Install PTO Output Shaft

Shiftable PTO Shifter-Exploded View

Remove PTO Shifter

Install PTO Shifter

Replace PTO Brake

Replace PTO Output Shaft Oil Seal

Remove Valve Housing

Disassemble and Assemble Valve Housing

Install Valve Housing

Group 35: Drive Lines

Specifications

MFWD Drive Shaft

Engine Coupler Shaft

Group 40: Hydraulic Pump Drive

Special or Essential Tools

Service Equipment and Tools

Specifications

General Repair Procedures- Pump Drive

Hydraulic Pump Drive-Cross-Sectional View

Remove and Disassemble Pump Drive Pinion Gear

Remove and Disassemble Pump Drive Gear

Assemble and Install Pump Drive Gear

Assemble and Install Pump Drive Pinion

Group 45: Front PTO

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

General Repair Procedures- PTO

Clutch

Remove PTO Clutch and Pump

Disassemble Pump

Disassemble PTO Clutch

Replace PTO Brake

Remove PTO Output Gear

Replace Idler Gear (Three Gear Clockwise Rotation PTO Only)

Remove Modulating Valve

Disassemble and Assemble Valve Housing

Install Modulating Valve

Install PTO Output Gear

Assemble PTO Clutch

Assemble Pump

Install PTO Clutch and Pump

Front PTO Driveline-Cross-Sectional View

Repair Front PTO Driveline

Repair Pressure and Lube Regulating Valves

Section 60: Steering and Brakes

Group 05: Hydrostatic Steering

Special or Essential Tools

Service Equipment and Tools

Specifications

Remove and Install Steering Valve

Steering Valve-Exploded View

Disassemble, Inspect, and Assemble Steering Valve

Remove and Install Auxiliary Steering Pump

Disassemble, Inspect, and Assemble Auxiliary Steering Pump

Group 10: Steering Cylinders

Specifications

Other Material

Service Parts Kits

Remove and Install Steering Cylinder

Cross-Sectional and Exploded View- Steering Cylinder Two-Wheel Drive

Cross-Sectional and Exploded View- Steering Cylinder MFWD

Group 15: Brake Valve

Service Parts Kits

Specifications

General Repair Procedures- Brake Valve

Remove and Install Brake Valve

Disassemble, Inspect, and Assemble Brake Valve

Bleed Brakes

Check Manual Brakes

Group 20: Brake Components

Specifications

Remove, Inspect, and Install Brake Pistons, Plates, and Disks

Inspect and Adjust Secondary Brake

Group 25: Trailer Brakes

Specifications

Remove and Install Hydraulic Trailer Brake Valve

Repair Hydraulic Trailer Brakes

Repair Air Trailer Brakes

Section 70: Hydraulics

Group 00: Component Removal and Installation

Essential or Recommended Tools

Specifications

Remove and Install Inlet-Priority Valve Assembly

Remove and Install Main Hydraulic Pump

Remove and Install Charge Pump

Group 05: Controls

Remove, Install, and Adjust SCV Linkage

Group 10: Hydraulic Pump and Charge Pump

Essential or Recommended Tools

Service Equipment and Tools

Other Material

Service Parts Kits

Specifications

General Repair Procedures- Hydraulic Pumps

Remove and Install Hydraulic Pump Controller

Hydraulic Pump Controller-Exploded View

Disassemble, Inspect, and Assemble Pump Controller

Hydraulic Pump-Exploded View

Disassemble, Inspect, and Assemble Hydraulic Pump

Adjust Yoke Bearing Preload

Adjust Shaft Bearing Preload

Inspect Hydraulic Charge Pump

Group 15: Hydraulic System Valves

Essential or Recommended Tools

Service Parts Kits

Specifications

General Repair Procedures- Hitch and Inlet-Priority Valves, and Filter Bypass

Remove, Inspect, and Install Hydraulic Filter Bypass

Disassemble, Inspect, and Assemble Inlet-Priority Valve

Remove and Install Hitch Valve

Disassemble, Inspect, and Assemble Hitch Valve

Adjust Hitch Valve

Group 20: Selective Control Valves and Couplers

Essential or Recommended Tools

Other Material

Service Parts Kits

Specifications

General Repair Procedures- Selective Control Valves and Couplers

SCV Identification

Remove, Inspect, and Install Selective Control Valves

Selective Control Valve-Exploded View- Three-Position

Selective Control Valve-Exploded View- Two-Position

Replace Control Knobs

Inspect Poppet Load-Check Valves

Inspect Pressure Compensator Valve- Three-Position SCV

Inspect Metering Valve- Three-Position SCV

Inspect Metering Valve- Two-Position SCV

Disassemble, Inspect, and Assemble Control Valve- Three-Position SCV

Disassemble, Inspect, and Assemble Control Valve- Two-Position SCV

Disassemble, Inspect, and Assemble Couplers

Group 25: Hitch

Essential or Recommended Tools

Specifications

Remove and Install Lift Cylinders

Cross-Sectional and Exploded View- Lift Cylinder

Replace Rockshaft Housing Bushings

Group 30: Row Guidance

Service Parts Kits

Specifications

Remove and Install Probe Module

Repair Row Guidance Cylinder

Exploded View- Row Guidance Cylinder

Group 35: Remote Cylinder

Specifications

Disassemble and Inspect Remote Cylinder

Assemble and Bleed Remote Cylinder

Group 40: Bleed Hydraulic System

Bleed Hydraulic System

Section 80: Miscellaneous

Group 00: Component Removal and Installation

Special or Essential Tools

Specifications

Remove Front Axle

Install Front Axle

Group 05: Front Axle

Other Material

Specifications

Replace Knee Bushings

Group 10: Hood

Remove, Install, and Adjust Hood

Group 15: Trailer and Pick-Up Hitch

Repair Trailer Hitch

Adjust Trailer Hitch Release

Repair Pick-Up Hitch

Adjust Pick-Up Hitch

Section 90: Operator Station

Group 00: Component Removal and Installation

Specifications

Remove Cab

Install Cab

Group 05: Controls

Remove and Install Heater and Air Flow Control Cables

Adjust Heater and Air Flow Control Cables

Group 10: Air Conditioning System

Special or Essential Tools

Service Equipment and Tools

Other Material

Service Parts Kits

Specifications

Hose and Tubing O-Ring Connection Torques

Discharge Air Conditioning System

Remove and Install Compressor

Test Volumetric Efficiency

Test Shaft Seal Leakage

Disassemble and Assemble Compressor Clutch

Disassemble, Inspect, and Assemble Compressor

Check Clutch Hub Clearance

Inspect Compressor Manifold

Remove and Install Compressor Relief Valve

Replace Receiver-Dryer

Remove Evaporator/Heater Core

Leak Test Evaporator/Heater Core

Install Evaporator/Heater Core

Service Expansion Valve

Expansion Valve Bench Test-Diagram

Expansion Valve Bench Test

Replace Thermo Switch

Remove, Clean, and Install Air Filters

Refrigerant Oil Information

Check Compressor Oil Charge

Determine Correct Refrigerant Oil Charge

Add Refrigerant Oil to System

System Information

Air Conditioning System-Diagram

Air Conditioning System Fitting-Reference Chart

Flush Air Conditioning System

Purge Air Conditioning System

Evacuate Air Conditioning System

Charge Air Conditioning System

Group 15: Heating System

Remove Heater Control Valve

Leak Test Heater Control Valve

Install Heater Control Valve

Group 20: Seat

Other Material

Remove Seat and Mechanical Suspension

Disassemble, Inspect, and Assemble Mechanical Suspension Assembly

Install Mechanical Suspension Assembly

Remove Seat and Air Suspension

Remove Seat From Suspension

Remove Swivel Plate

Disassemble, Inspect, and Assemble Air Suspension Assembly

Install Seat and Air Suspension

Group 25: ROPS and Cab

Repair Cab Door Latch

Cab Door Adjustment- Step 1

Cab Door Adjustment- Step 2

Cab Door Adjustment- Step 3

Cab Door Adjustment- Step 4

Cab Door Adjustment- Step 5

Check ROPS

Section 99: Dealer Fabricated Tools

Group 05: Fabricated Tools

Fabricated Tools

DFRW20-Compressor Holding Fixture

DFRW29-Final Drive Housing Adapter

DFRW30-Axle Jacking Tool

DFRW60 - DFRW61 - DFRW62-Extension Harnesses

DFRW63-DFRW64-DFRW65-DFRW66-DFRW81-Tap-Out Harnesses

DFRW70-Holding Tool

DFRW77-Rear Tractor Access Platform

DFRW78-Seat Support Tray

DFRW79-Piston Holding Tool

DFRW80-Front PTO Lifting Brackets and Spacers

DFRW87-Pick-Up Hitch Adapter Plate

DFRW108-Park Rod Adjusting Nut Tool Tool may be purchased. Order JDG952

John Deere Tractors 7600, 7700, 7800 Repair Service Manual (TM1500)