John Deere 6650, 6750, 6850 and 6950 Self-Propelled Forage Harvesters Technical Manual (TM4631)

Illustrated factory Technical Manual for John Deere Self-Propelled Forage Harvesters Models 6650, 6750, 6850 and 6950.

This manual will assist you in diagnosing, and repairing for your self-propelled forage harvester.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.

Covered Models:
   6650 (SN: 504341-)
   6750 (SN: 504341-)
   6850 (SN: 504341-)
   6950 (SN: 504341-)

Format: PDF, 1077 pages
Language: English
Publication Date: 21 Jan 2002
Table of Contents:
   Introduction
      Foreword
   Safety
      Safety Information
   General Information
      Fuel, Lubricants and Coolant
      Torque Values
      Serial Numbers
      Dimensions
   Engine
      Engine Removal and Installation
   Fuel, Air Intake and Cooling Systems
      Fuel Tank
      Air Intake System
      Engine Cooling System
   Electrical System
      Electrical Connectors
      Electrical System Components
   Power Train
      Main Drive Belt Replacement
      Bevel Gear Drive
      Transmission and Differential
      Final Drives
      Hydrostatic Drive, Variable Pump
      Hydrostatic Drive, Fixed-Displacement Motor
      Hydrostatic Drive, Oil Change
      Cam Lobe Motor
   Brakes, Steering and Rear Axle
      Brake Operation
      Brakes
      Hydrostatic Steering
      ROW-TRAK System
      Rear Axle
   Hydraulic System
      Hydraulic Pressure Accumulator
      Triple Hydraulic Pump
      Electromagnetic Control Valve
      Reverser Motor
      Hydraulic Motor - Discharge Spout
   Miscellaneous
      Fuel Tank Hood
      Central Lubrication System
   Operator`s Cab, Air Conditioning System
      Control Levers
      Cab Ventilation
      Cab Window Replacement
      R134a Air Conditioning System
      Super Comfort Seat
   Harvesting Units
      Harvesting Unit Cross Drive
      Harvesting Units
   Feeding System
      Length-of-Cut Transmission
      Reverser Motor and Clutch
      Electric Clutch
      Feed Roll Channel
      Feed Roll Assembly
      Locking Pawl
   Cutterhead Assembly
      Knife Sharpening Device
      Cutterhead
      Bottom and Outlet Bands
      Stationary Knife Removal and Installation
      Kernel Processor
      Power Chute
   Discharge Components
      Discharge Fan
      Blower Rotor and Rotor Bearings
      Discharge Spout
   General Information
      Specifications
      Drive Diagrams
      Ballast Charts
      Tread Widths
   Service Codes
      Control Unit
      Diagnostic Trouble Codes for Powertech Engine 6081
      Diagnostic Trouble Codes for Powertech Engine 6125
      ECU Service Codes (Cummins Engine)
   Engine
      Engine Specifications
      Engine Tests
   Fuel, Air Intake and Cooling Systems
      Fuel, Air Intake and Cooling Systems
   Electrical System (up to Serial No. 504991)
      Preliminary Checks
      General Information
      Test Equipment
      Electrical System Diagrams
      Batteries, Starting Motor, Alternator
      Safety Switches, Basic Relays
      Engine Shut-Off Device
      Gauges
      Electronic INFO-TRAK Monitor
      Turn Discharge Spout
      Raise/Lower Discharge Spout
      Central Lubrication System
      Horizontal Reel Adjustment
      Raise Reel
      Reel Speed Adjustment
      676 Rotary Harvesting Unit (North America)
      Attach Trailer
      Header Raise/Lower
      Pressure Valves, Trailer Dump
      Main Clutch, Reverser
      Four-Wheel Drive
      Lighting System
      Work Lights
      Stop Lights, Horn, Electrical Outlet (Europe Only)
      Stop Lights, Horn, Electrical Outlet (USA Only)
      Beacon Light
      Fan, Air Conditioning System
      Windshield Wiper-/Washer System
      Radio, Interior Lighting
      Rotary Radiator Screen, Reverse Travel Alarm
      Cigarette Lighter, Seat Compressor
      Discharge Spout Rinsing System
      Discharge Spout Flap Adjustment
      Main Electronic System
      Metal Detector
      Electronic Control Unit
      ROW-TRAK System
      POWR-SAVR
      676 Rotary Harvesting Unit (North America)
   Electrical System (from Serial No. 504992)
      Preliminary Checks
      General Information
      Test Equipment
      Electrical System Diagrams
      Batteries, Starting Motor, Alternator
      Safety Switches, Basic Relays
      Engine Shut-Off Device
      Instruments
      Electronic INFOTRAK Monitor
      Turning Discharge Spout
      Raising/Lowering Discharge Spout
      Central Lubrication System
      Reel Horizontal Adjustment
      Raising Reel
      Reel Speed Adjustment
      676 Rotary Harvesting Unit (North America)
      Attaching Trailer
      Raising/Lowering Harvesting Unit
      Pressure Valves, Trailer Dump
      Main Clutch, Reverser
      Four-Wheel Drive
      Lighting System
      Work Lights
      Stop Lights, Horn, Electrical Outlet (Europe Only)
      Stop Lights, Horn, Electrical Outlet (USA Only)
      Beacon Light
      Fan, Air Conditioning System
      Windshield Wiper/Washer System
      Radio, Interior Lighting
      Rotary Radiator Screen, Reverse Travel Alarm
      Cigarette Lighter, Seat Compressor
      Discharge Spout Rinsing System
      Discharge Spout Flap Adjustment
      Main Electronic System
      Metal Detector
      Electronic Control Unit
      ROW-TRAK System
      POWR-SAVR
      676 Rotary Harvesting Unit (North America)
      Cutterhead Alarm
   Power Train
      Angled Drive
      Hydrostatic Drive
      Three-Speed Transmission
      Testing Hydrostatic System
   Brakes, Steering, Rear Axle
      Brake Operating System
      Drum Brakes
      ROW-TRAK System
      ROW-TRAK Steering Function
      ROW-TRAK Calibration
   Hydraulic System
      General Information
      Electromagnetic Control Valve
      Testing Hydraulic System
      Header Float System
   Operator`s Cab
      System Operational Checks
      System Diagnosis - Air Conditioning System, Operator`s Seat
      Theory of Operation