John Deere 650 and 750 Tractors Technical Manual

Description

This massive 800 page, John Deere 650 and 750 Tractors Technical Manual is a reproduction of the original, out of print, John Deere 650 and 750 Tractors Technical Manual.  It provides repair and diagnostic information for John Deere 650 and 750 tractors.
Sep-84

Table of Contents
Repair sections
General – Section 10
Group 00 – Specifications and Special Tools
General Tractor Specifications
Predelivery
Tune-Up
Lubrication
Separation
Special Tools
Group 05 – Predelivery, Delivery and After-Sale Services
Predelivery Service-General Information
Lubricate Grease Fittings
Align Muffler
Adjust All Lamps
Torque Wheel Hardware
Check Tire Pressures
Adjust Wheel Spacing-Front Tread
Adjust Wheel Spacing-Rear Tread
Adjust Front Wheel Toe-In
Adjust 650 Tractor Toe-In
Adjust 750 Tractor Toe-In
Engine Break-In
Verify Predelivery Service
Delivery Service
After-Sale Inspection
Group 10 – Tune-Up
Preliminary Engine Tests
Remove and Inspect Air Cleaner Element
Clean Filter Element
Tighten Air Intake Connections
Clean Crankcase Breather System
Clean Radiator Screen
Test Cooling System
Flush Cooling System
Check and Adjust Fan Belt Tension
Clean Fuel Filter
Clean and Adjust Injection Pump Timing
Check and Adjust Fast Idle Speed
Clean and Test Battery
Make Final Engine Test
Check Toe-In
Miscellaneous
Group 15 – Lubrication
Lubricate Tractor Properly
Use Correct Engine Oil
Use Correct Transmission-Hydraulic Oil
Use Correct Grease
Use Approved Alternative Lubricants
Store Lubricants Correctly
Lubrication Services (Chart)
Check Engine Oil Level
Change Engine Oil and Oil Filter
Clean Crankcase Vent System
Check Transmission-Hydraulic Oil Level
Change Transmission-Hydraulic System Oil
Service Transmission-Hydraulic Filter Screen
Replace Transmission-Hydraulic Oil Filter
Check Front Axle Oil Level (MFWD Tractors Only)
Change Front Axle Oil (MFWD Tractors Only)
Repack Front Wheel Bearings (650 Without MFWD)
Repack Front Wheel Bearings (750 Without MFWD)
Lubricate Steering Linkage
Lubricate Front Axle Pivot (Tractors Without MFWD)
Lubricate Steering Spindles (Tractors Without MFWD)
Lubricate Steering Spindles (650 With MFWD)
Lubricate Clutch and Brake Pedal Pivots
Lubricate 3-Point Hitch
Lubricate Front PTO Shaft Bearing
Group 20 – Separation
Remove Front End
Install Front End
Remove Engine
Install Engine
Remove Front End From Clutch Housing
Install Front End To Clutch Housing
Remove Clutch Housing From Transmission
Install Clutch Housing To Transmission
Mount Transmission Stand
Remove Axle
Install Axle
Group 25 – 750 Separation
Remove Front End
Install Front End
Remove Front End From Clutch Housing
Install Front End To Clutch Housing
Remove Engine
Install Engine
Remove Clutch Housing From Transmission
Install Clutch Housing To Transmission
Remove Transmission From Differential
Install Transmission To Differential
Mount Transmission Stand
Remove Axle
Install Axle

Engine Repair – Section 20
Group 00 – Specifications and Special Tools
Specifications
Special Tools
Group 05 – Valve Train, Cylinder Head and Camshaft
Diagnose Malfunctions
Check and Adjust Valve Clearance
Remove and Disassemble Rocker Arm Assembly
Inspect and Repair Rocker Arm Assembly
Assemble Rocker Arm Components
Remove Cylinder Head
Remove Valves and Springs
Inspect Springs
Clean and Inspect Valves
Clean and Inspect Valve Guides
Repair and Replace Valve Guides
Inspect and Repair Valve Seats
Check Valve Height
Inspect Cylinder Head
Install Valves and Springs
Install Cylinder Head
Install Rocker Arm Assembly
Check Camshaft Gear Backlash
Remove Camshaft
Remove Camshaft Bearing
Inspect Camshaft
Inspect Camshaft Followers
Inspect Pushrods
Install Camshaft
Group 10 – Pistons, Rods, and C Blocks
Diagnose Malfunctions
Remove Pistons
Inspect Piston Rings and Grooves
Inspect Piston Pins and Bushings
Replace Piston Pin Bushings
Inspect Pistons
Inspect Connecting Rod Bearings
Install Piston Pins, Rods, and Rings
Inspect Cylinders
Deglaze Cylinders
Clean and Inspect Block
Install Pistons
Group 15 – Flywheel, Crankshaft and Main Bearings
Diagnose Malfunctions
Check Crankshaft End-Play
Inspect Flywheel
Replace Flywheel Ring Gear
Replace Clutch Shaft Pilot Bushing
Remove Crankshaft
Inspect Crankshaft Main Bearing
Replace Front Main Bearings
Replace Intermediate Main Bearings
Replace Rear Main Bearing and Oil Seal
Replace Front Ball Bearing and Oil Seal
Install Crankshaft
Group 20 – Lubrication System
Diagnose Malfunctions
Remove and Inspect Oil Pressure Regulating Valve
Remove and Inspect Oil Pump
Clean and Inspect Oil Inlet Pipe
Group 25 – Cooling System
Diagnose Malfunctions
Test Cooling System
Remove Radiator
Replace Fan Belt
Remove Water Pump
Disassemble and Inspect Water Pump
Assemble Water Pump
Install Water Pump
Inspect Thermostat

Fuel Repair – Section 30
Group 00 – Specifications and Special Tools
Specifications
Special Tools
Group 05 – Air Intake System
Remove and Inspect Air Cleaner Element
Remove and Inspect Intake Manifold
Group 10 – Diesel Fuel System
Replace Fuel Filter Element
Remove Injection Pump
Install Injection Pump
Check and Adjust Pump Timing
Bleed Fuel System
Remove Injection Nozzles
Test Injection Nozzles
Check and Adjust Nozzle Opening Pressure
Test Nozzle for Leakage
Test Chatter and Spray Pattern
Disassemble Nozzle
Clean and Inspect Nozzle Components
Assemble Nozzle
Install Nozzle
Remove Precombustion Chamber
Inspect and Repair Precombustion Chamber
Install Precombustion Chamber
Check Governor Adjustment
Adjust Governor Assembly
Remove and Repair Governor Assembly
Install Governor
Diagnose Thermo-Start Malfunctions
Inspect Thermo-Start Plug
Test Thermo-Start Plug
Remove Fuel Tank
Leak Test Tank (air pressure method)
Leak Test Tank (wet method)
Install Fuel Tank
Group 15 – Speed Control Linkage
Remove Hand Throttle Linkage
Inspect Hand Throttle Linkage
Remove and Inspect Foot Throttle Linkage

Electrical Repair -Section 40
Group 00 – Specifications and Special Tools
Battery
Fuses
Charging Circuit
Starting Circuit
Bulbs
Accessory Circuits
Special Tools
Group 05 – General Information
Key Switch
Fuse Block
Group 10 – Charging System
General Information
Alternator Removal
Alternator Test and Repair
Alternator Disassembly
Regulator Check
Group 15 – Starting Motor
General Information
Removal
Disassembly—650
Disassembly—750
Brush Inspection and Repair
Armature Inspection and Repair
Field Windings Inspection and Repair
Assembly—650 and 750
Gear Train and Overrunning Clutch
Group 20 – Instruments and Accessory Circuits
General Information
Fuses
Temperature Sender Test
Oil Pressure Sender Test
Charging System Indicator
Thermo-Start
Group 25 – Lighting Circuits
General Information
Light Switch
Head Lamps
Tail Lamp
Warning Lamps
Flood Lamp
Turn Signal Controller
Instrument Indicator Lamps

650 Power Train Repair – Section 50
Group 00 – Specifications and Special Tools
Specifications
Engine Clutch and Linkage
Sliding Gear Transmission
Rear PTO
Differential
Final Drive
Mechanical Front-Wheel Drive
Front PTO
Special Tools
Group 05 – Engine Clutch and Linkage
Remove Clutch Shaft Release Mechanism
Inspect and Repair Clutch Shaft and Release Mechanism
Remove and Inspect Clutch and Flywheel
Inspect Clutch
Install Clutch Shaft and Release Mechanism
Adjust Pedal Free Play
Group 10 – Sliding Gear Transmission
Remove, Disassemble and Inspect Change Shift Lever
Remove Front Bearing Quill With Shafts
Remove and Inspect Change Shift Levers
Remove, Disassemble and Inspect Transmission Drive Shaft
Remove and Inspect Reverse Gear Shaft
Remove, Disassemble and Inspect Differential Drive Shaft
Assemble and Install Differential Drive Shaft
Assemble and Install Reverse Gear Set and Transmission Drive Shaft
Install Shifter Shafts and Bearing Quill
Group 15 – Rear PTO
Remove and Inspect PTO Shifter
Remove and Inspect PTO Pinion Shaft
Remove and Inspect PTO Drive Shaft
Assemble and Install Final Drive Shaft
Assemble and Install PTO Pinion Shaft
Install PTO Shifter
Group 20 – Differential
Remove Differential
Disassemble and Inspect Differential
Assemble Differential
Install Differential
Adjust Differential Cone Point
Adjust Differential Backlash
Remove Differential Lock
Inspect Differential Lock Assembly
Install Differential Lock
Group 25 – Final Drive
Remove and Inspect Axle
Remove and Inspect Pinion Shaft
Assemble and Install Pinion Shaft
Assemble and Install Axle Shaft
Group 30 – Mechanical Front-Wheel Drive
Remove and Inspect Shifter Drive Shaft
Assemble and Install Shifter and Drive Shaft
Remove, Disassemble and Inspect Outer Drive Housing
Remove, Disassemble and Inspect Differential Drive Shaft Housing
Remove, Disassemble and Inspect Differential
Assemble and Install Differential
Assemble and Install Differential Drive Shaft
Adjust Differential Cone Point
Adjust Ring Gear-to-Pinion Backlash
Adjust Axle Bevel Gear-to-Bevel Gear Backlash
Assemble Outer Drive Housing
Adjust Outer Drive Gear-to-Bevel Gear Backlash
Install Axle and Outer Drive Housing
Inspect and Disassemble Universal Joints
Remove and Disassemble PTO
Assemble PTO
Check and Adjust Armature Assembly-to-Field Assembly Clearance
Check and Adjust Brake Tension

750 Power Train Repair – Section 55
Group 00 – Specifications And Special Tools
Specifications
Engine Clutch And Linkage
Sliding Gear Transmission
Rear PTO
Differential
Final Drive
Mechanical Front-Wheel Drive
Front PTO
Special Tools

Group 05 – Engine Clutch And Linkage
Remove Clutch Shaft And Release Mechanism
Inspect And Repair Clutch Shaft And Release Mechanism
Remove And Inspect Clutch And Flywheel
Install Clutch Shaft And Release Mechanism
Adjust Pedal Free Play

Group 10 – Sliding Gear Transmission
Remove, Disassemble And Inspect
Change Shift Lever
Remove And Disassemble Shifter Shafts And Forks
Remove Front Bearing Quill With Shafts
Remove And Disassemble Front Differential Drive Shaft Half
Inspect Front Differential Drive Shaft Half
Remove And Disassemble Rear Differential Drive Shaft Half
Inspect Rear Differential Drive Shaft Half
Remove And Disassemble Transmission Drive Shaft
Inspect Transmission Drive Shaft
Remove And Inspect Reverse Idler Shaft
Remove Hi-Lo Shifter Shaft
Inspect Hi-Lo Shift Shaft Components
Assemble And Install Hi-Lo Shifter Shaft
Assemble And Install Reverse Idler Shaft
Assemble And Install Transmission Drive Shaft
Assemble And Install Rear Differential Drive Shaft Half
Assemble And Install Front Differential Drive Shaft Half
Install Front Bearing Quill With Shafts
Assemble And Install Shifter Assembly

Group 15 – Rear PTO
Remove PTO Assembly With Shafts
Remove, Disassemble And Inspect PTO Pinion Shaft
Remove And Disassemble PTO Shifter And Shaft
Inspect PTO Shaft
Remove And Inspect PTO Armshaft And Shifter
Install Armshaft
Assemble PTO Shaft
Assemble PTO Pinion Shaft
Install PTO Assembly

Group 20 – Differential
Remove And Inspect Differential Lock Assembly
Remove Differential
Disassemble And Inspect Quills
Disassemble And Inspect Differential
Assemble Differential
Assemble Quills
Install Differential
Check Backlash And Bearing Clearance
Install Differential Lock Assembly

Group 25 – Final Drive
Remove And Inspect Axle Shaft
Assemble And Install Axle Shaft

Group 30 – Mechanical Front-Wheel Drive
Remove And Disassemble Drop Housing
Inspect Drop Housing Components
Assemble Drop Housing
Remove And Disassemble Outer Drive Housing
Inspect Outer Drive Housing Components
Remove And Disassemble Spindle Housing
Inspect Spindle Housing Components
Remove And Disassemble Differential Drive Shaft
Inspect Differential Drive Shaft Components
Remove And Disassemble Differential Carrier
Inspect Differential Carrier Components
Assemble And Install Differential Carrier
Assemble Differential Drive Shaft
Check Differential Drive Shaft Starting Drag Torque
Check Differential Drive Shaft Cone Point
Adjust Differential Backlash
Assemble Spindle Housing
Check Axle Bevel Gear-To-Upper Spindle Bevel Gear Backlash
Assemble Outer Drive Housing
Check Spindle Lower Bevel Gear-To-Outer Drive Gear Backlash
Install Spindle Housing And Drop Housing
Check Steering Arm-To-Spindle Housing Clearance

Group 35 – Front PTO
Remove And Disassemble PTO
Assemble PTO
Check And Adjust Armature Assembly-To Field Assembly Clearance
Check And Adjust Brake Tension

Steering / Brakes Repair – Section 60
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – Steering Gear Repair
Removing Steering Gear
Disassemble Steering Gear
Repair Steering Gear
Assemble And Adjust Steering Gear
Adjust Steering Free Play

Group 10 – Power Steering Repair (Field Option)
Remove And Repair Flow Divider Block
Assemble And Install Flow Divider Block
Remove Steering Control Valve
Disassemble Steering Control Valve — Repair And Assemble Steering Control Valve
Adjust Linkage And Install Steering Control Valve
Remove And Disassemble Steering Cylinder
Repair And Assemble Steering Cylinder
Adjust Linkage And Install Steering Cylinder
Hydraulic Line Routing (Tractors With Power Steering Only)
Tractors With Power Steering And Selective Control Valve
Repair Auxiliary Oil Filter

Group 15 – Brakes Repair
Remove Brake Pedal Assemble
Repair And Assemble Brake Pedals
Remove Brake Shoes And Drum
Inspect And Repair Brake Assembly
Assemble And Install Brakes
Adjust Brake Pedal Free Play
Repair Parking Brake Lever

Hydraulic Repair – Section 70
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – Hydraulic Pump Repair
General Information
Remove Hydraulic Pump And Drive Gear
Replace Pump Seal And Packings
Disassemble Pump Drive
Inspect, Repair And Assemble Pump Drive
Install Drive Gear And Pump
Oil Filter Screen

Group 10 – Rockshaft And Implement Hitches
Remove Rockshaft Piston Cover
Remove And Repair Stop Valve
Remove And Repair Main System Relief Valve
Remove And Repair Surge Relief Valve
Remove And Inspect Rockshaft Piston
Remove Rockshaft Control Valve
Assemble And Install Rockshaft Control Valve
Remove Rockshaft Control Quadrant
Inspect And Repair Quadrant
Adjust Feedback Linkage
Remove Rockshaft Housing
Disassemble Rockshaft Housing
Inspect And Repair Rockshaft Housing And Components
Assemble Rockshaft Housing
Adjust Feedback Linkage
3-Point Hitch
650
750
Center Link Repair
Adjustable Lift Link Repair

Group 15 – Selective Control Valve Repair
Remove Selective Control Valve Housing
Disassemble And Repair Selective Control Valve
Assemble Selective Control Valve
Repair Couplers
Disassemble And Repair Control Levers
Assemble And Install Selective Control Valve
Hydraulic Line Connections

Miscellaneous Repair – Section 80
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – Front Axle Assembly
Check And Adjust Axle End-Play
Remove Axle Assembly
Inspect And Replace Pivot Pin Bushing
Install Axle Assembly
Remove Spindle Shaft And Hub
Replace Spindle Shaft Bushing

Group 10 – Wheels
Remove And Inspect Wheel Bearings
Install Bearings And Grease Seals
Install Hubs And Wheels
Tighten Wheel Retaining Cap Screws

Group 15 – Operators Station Repair
Installing Roll-Gard Protective Equipment
Reinstalling Roll-Gard Protective Equipment
Seat Belt Installation

Operation and Test sections
Engine Operation and Tests – Section 220
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – System Operation
Lubrication System
Cooling System

Group 10 – System Tests And Diagnosis
Diagnose Malfunctions
Perform Dynamometer Test
Perform Engine Break-In
Test Compression Pressure
Check And Adjust Valve Clearance
Check Crankshaft End-Play
Check Engine Oil Pressure
Adjust Engine Oil Pressure
Test Cooling System

Fuel / Air  Operation and Tests – Section 230
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – Air Intake System
How The Air Intake System Works
How The Air Cleaner Works
Diagnose Malfunctions

Group 10 – Diesel Fuel System
How The Diesel Fuel System Works
How The Precombustion Chamber Works
Diagnosing Malfunctions
Diagnose Fuel System Malfunctions
Fuel Filter – General Information
Fuel Flow Through Filter
Bleed Fuel System
How The Injection Pump Works
Checking And Adjusting Injection Pump Timing
Checking Pump Fast Idle Speed
Fuel Injection Nozzles – General Information
How The Injection Nozzle Works
Diagnosing Injection Nozzle Malfunctions
Governor Assembly – General Information
Governor Operation At Engine Start-Up
Governor Operation As Engine Speeds Up
Governor Operation With Load Applied To Engine
Governor Operation-Engine Shut Off
Adjusting Governor Assembly
Thermostart System – General Information
How The Thermostart System Works

Group 15 – Speed Control Linkage
Checking And Adjusting Slow Idle Speed

Electrical Operation and Tests – Section 240
Group 00 – Specifications And Special Tools
Battery
Fuses
Charging Circuit
Starting Circuit
Bulbs
Accessory Circuits
Special Tools

Group 05 – General Information And Diagrams
General Diagnosis
Operational Checks
Precautions
Electrical Diagnostic Kit
Front PTO Interlock Circuit Diagnosis
Wiring Diagrams

Group 10 – Charging System
General Information
How The System Works
Precautions
Battery Cranking Check
Battery Tests
Charging System Tests
Alternator Stator Winding Tests

Group 15 – Starting Circuit
General Information
How The System Works
Trouble Shooting
Circuit Tests
Key Switch

Group 20 – Instruments And Accessory Circuits
General Information
Fuses
Temperature Sender Test
Oil Pressure Sender Test
Charging System Indicator
Thermo-Start

Group 25 – Lighting Circuits
General Information
Light Switch
Head Lamps
Tail Lamps
Warning Lamps
Flood Lamp
Turn Signal Controller
Instrument Indicator Lamps

650 Power Train Operation and Tests – Section 250
Group 00 – Specifications And Special Tools
Specifications

Group 05 – Clutch And Transmission Operation
Single Stage Engine Clutch
Eight-Speed Transmission
540 RPM PTO

Group 10 – Diagnosing The Transmission And Front-Wheel Drive
Preliminary Checks And Adjustments
Isolating The Problem To Clutch Housing, Transmission, PTO Or Final Drive
Isolating Oil Leakage
Diagnosing Malfunctions – Transmission Clutch
Diagnosing Malfunctions – Transmission
Diagnosing Malfunctions – Rear PTO
Diagnosing Malfunctions – Front-Wheel Drive
Diagnosing Malfunctions – Front PTO

Group 15 – Differential And Final Drive
Differential
Final Drive
Diagnosing Malfunctions

Group 20 – Mechanical Front-Wheel Drive Operation
Differential Drive Shaft
Differential And Final Drive

750 Power Train Operation and Tests – Section 255
Group 00 – Specification And Special Tools
Specifications

Group 05 – Clutch And Transmission Operation
Single Stage Engine Clutch
Eight-Speed Transmission
540 RPM PTO
Front PTO

Group 10 – Diagnosing The Clutch, Transmission, PTO And Front-Wheel Drive
Preliminary Checks And Adjustments
Isolating The Problem To Clutch Housing, Transmission, PTO Or Final Drive
Isolating Oil Leakage
Diagnosing Malfunctions – Transmission Clutch
Diagnosing Malfunctions – Transmission
Diagnosing Malfunctions – Rear PTO
Diagnosing Malfunctions – Front-Wheel Drive
Diagnosing Malfunctions – Front PTO

Group 15 – Differential And Final Drive
Diagnosing Malfunctions

Group 20 – Mechanical Front-Wheel Drive Operation
Differential Drive Shaft
Differential And Final Drive

Steering / Brakes Operation and Tests – Section 260
Group 00 – Specifications And Special Tools
Specifications

Group 05 – Manual Steering
Steering Operation
Diagnosing Malfunctions

Group 10 – Power Steering
Power Steering Operation
Neutral-Power Steering
Right Turn-Power Steering
Left Turn-Power Steering
Flow Divider Block Operation

Group 15 – Brakes
Brake Operation
Diagnosing Malfunctions

Hydraulic Operation and Tests – Section 270
Group 00 – Specifications And Special Tools
Specifications
Special Tools

Group 05 – Hydraulic System Operation
How The System Works
Tractors With Optional Power Steering And Selective Control Valve
Main System Relief Valve Operation

Group 10 – Hydraulic System Tests
General Information
Hydraulic Oil Temperature
How To Use Step-By-Step Hydraulic Diagnosis Charts
Safety Instructions
Fitting Guide For Hydraulic Flow Testing
Contents Of Hydraulic Diagnosis
Heating Hydraulic Oil
Preliminary Checks
Step-By-Step Hydraulic Diagnosis Chart

Group 15 – Hydraulic Pump
Hydraulic Pump Operation
Diagnosing Malfunctions

Group 20 – Rockshaft And Implement Hitches
Rockshaft Operation
Rockshaft-Neutral
Raising The Rockshaft
Lowering The Rockshaft
Rate Of Drop Valve
Surge Relief Valve
Stop Valve
Diagnosing Malfunctions

Group 30 – Selective Control Valve
Selective Control Valve Operation
Neutral
Extend
Retract
Float
Lift Check Plungers
Float Lockout Lever
Disconnect Couplers
Diagnosing Malfunctions