Complete Diagnostics Test manual with electrical wiring diagrams for John Deere 6650, 6750, 6850, 6950 Self-Propelled Forage Harvester (S.N.503681-504430), with technical information to maintain, diagnose, and service like professional mechanics.

John Deere 6650, 6750, 6850, 6950 Self-Propelled Forage Harvester workshop Operation & Test manual 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.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* 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.

TM4621 - John Deere Self-Propelled Forage Harvesters Models 6650, 6750, 6850, 6950 Technical Manual (Diagnosis & Tests).PDF
TM4621 - John Deere Self-Propelled Forage Harvesters Models 6650, 6750, 6850, 6950 Technical Manual (Diagnosis & Tests).epub

Total Pages: 1,556 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English

MAIN SECTIONS
Engine
   Fuel, Air Intake and Cooling Systems
   Electrical System
   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
   Hydraulic System
      Hydraulic Pressure Accumulator
      Triple Hydraulic Pump
      Electromagnetic Control Valve
      Reverser Motor
      Hydraulic Motor - Discharge Spout
   Miscellaneous
   Operator`s Cab, Air Conditioning System
      Control Levers
      Cab Ventilation
      Cab Window Replacement
      R134a Air Conditioning System
      Super Comfort Seat
   Harvesting Units
   Feeding System
      Length-of-Cut Transmission
      Reverser 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
      Drive Diagrams
      Ballast Charts
      Tread Widths
   Engine
   Fuel, Air Intake and Cooling Systems
   Electrical System
      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
      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
      Lights
      Work Lights
      Stop Lights, Horn
      Beacon Lights
      Fan, Air Conditioning System
      Windshield Wiper/Washer System
      Radio, Interior Lighting
      Rotary Radiator Screen, Reverse Travel Alarm
      Cigarette Lighter, Seat Compressor
      Spout Rinsing System
      Discharge Spout Flap Adjustment
      Main Electronic System
      Metal Detector
      Electronic Control Unit
      ROW-TRAK System
      POWR-SAVR POWR-SAVR is a trademark of Deere & Company
      676 Rotary Harvesting Unit (North America)
   Power Train
   Brakes, Steering, Rear Axle
      Brake Operation
      Drum Brake
      ROW-TRAK System
      ROW-TRAK Steering Function
      ROW-TRAK Calibration
   Hydraulic System
      Electromagnetic Control Valve
      Hydraulic System Tests
      Header Float System
   Operator`s Cab

tm4621 - 6650, 6750, 6850 and 6950 self-propelled forage harvesters (503681-504430)

Table of Contents

Foreword

Section 05: Safety

Group 05: Safety Information

Live With Safety

Support Machine Properly

Wear Protective Clothing

Prepare for Emergencies

Work in Clean Area

Parking and Leaving the Forage Harvester

Remove Paint Before Welding or Heating

Handle Fluids Safely-Avoid Fires

Prevent Acid Burns

Prevent Battery Explosions

Avoid Heating Near Pressurized Fluid Lines

Illuminate Work Area Safely

Replace Safety Signs

Use Proper Lifting Equipment

Service Tires Safely

Practice Safe Maintenance

Avoid High-Pressure Fluids

Use Proper Tools

Service Machines Safely

Dispose of Waste Properly

Section 10: General information

Group 05: Fuel, Lubricants and Coolant

Fuel

Handle Fuel Safely-Avoid Fires

Fill the Fuel Tank

Fill Extra Fuel Tank

Diesel Engine Oil

Engine Coolant

Transmission Oil

Transmission and Hydraulic Oil

Grease

Alternative and Synthetic Lubricants

Mixing of Lubricants

Lubricant Storage

Use Genuine John Deere Parts

Group 10: Torque Values

Metric Bolt and Cap Screw Torque Values

Unified Inch Bolt and Cap Screw Torque Values

Group 15: Serial Numbers

Serial Number Plates

Forage Harvester Plate

Product Identification Number

Engine Serial Number - Cummins Engine

Engine Serial Number - Engine Type 6081

Engine Serial Number - Engine Type 6125

Operator's Cab Serial Number

Four Wheel Drive Motor Serial Number

Kernel Processor Serial Number

Three-Speed Transmission Serial Number

Final Drive Serial Number

Angled Drive (Main Gear Case) Serial Number

Length-of-Cut Transmission Serial Number

Group 20: Dimensions

Dimensions With Largest Tires

Section 20: Engine

Group 05: Engine Removal and Installation

Special or Essential Tools

Specifications

Prior to Removing Engine

Remove Engine

Engine Repair

Rear Engine Mounting

Lateral Engine Mounting

Lateral Engine Mounting (12.5 L)

Rear Engine Mounting (12.5 L)

Section 30: Fuel, Air Intake and Cooling Systems

Group 05: Fuel Tank

General Information

Removing the Fuel Tank

Removing Fuel Gauge Sending Unit

Installing the Fuel Gauge Sending Unit

Fuel Cooler

Replacing the Fuel Cooler

Prior to Removing the Cooling Elements

Removing the Cooling Elements

Installing the Cooling Elements

Group 10: Air Intake System

Air Cleaner and Muffler Assembly (6650)

Air Intake System (6650)

Air Cleaner and Muffler Assembly (6750, 6850)

Air Intake System (6750 and 6850)

Air Cleaner and Muffler Assembly (6950)

Air Intake System (6950)

Intercooler Location (6650, 6750, 6850)

Intercooler

Air Intake System (6950)

Group 15: Engine Cooling System

Engine coolant

Location of Engine Radiator

Engine Cooling System (6950)

Removing the Radiator

Installing the Radiator

Replacing the Coolant Level Sending Unit

Replacing the Viscous Drive

Checking Belt Tensioner Spring Tension and Belt Wear (John Deere Engines)

Tensioning Water Pump Drive Belt - Cummins Engine

Tensioning Fan Drive Belt - Cummins Engine

Checking Rotary Radiator Screen

Rotary Screen Components

Adjusting the Screen

Drive for Rotary Radiator Screen

Section 40: Electrical System

Group 05: Electrical Connectors

Special Tools

Electrical Repair Tool Kit

Electrical Connector Handling

Disconnecting electrical circuits

Replacing connectors

Insulated/Non-Insulated Connectors

Replacing Small MATE-N-LOC MATE-N-LOK is a trademark of the AMP company Contacts in Connector Housings

Replacing SURE-SEAL SURE-SEAL is a trademark of ITT Cannon Electric Connector Bodies

Replacing MATE-N-LOC MATE-N-LOC is a trademark of AMP Inc. and CPC CPC is a trademark of AMP Inc. Pin and Socket Contacts

Replacing DEUTSCH DEUTSCH is a trademark of Deutsch Co. Connectors

Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contact

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

WEATHER PACK WEATHER PACK is a trademark of Packard Electric Male and Female Connectors

Replacing METRI-PACK METRI-PACKis a trademark of the Packard Electric Co. Connectors

Replacing Schlemmer Schlemmer is a trademark of Josef Schlemmer GmbH Connectors

Group 10: Electrical System Components

Electronic Boards

Fuse Board A11 - Fuses

Relay-Diode Board

Engine Oil Pressure Sending Unit B1

Coolant Temperature Sending Unit B2

Reverser Motor Pressure Switch B4

Hydrostatic Oil Temperature Sending Unit B6

Hydraulic Oil Filter Sending Unit B7

Hydrostatic Charge Pressure Sending Unit B8

Air Cleaner Sending Unit B9

Cutterhead Speed Sending Unit B10

Ground Speed Sending Unit B12

Engine Speed Sending Unit B13

Air Conditioning System Temperature Switch B16

Air Conditioning System Low Pressure Switch B17

Air Conditioning System High Pressure Switch B18

Thermostat B19

Main Clutch Pressure Switch B23

Transmission Oil Temperature Sending Unit B25

Sound Sending Units B26 and B27

Fuel Tank Sending Unit B28

Rotary Radiator Screen Drive Motor M2

Cab Fan M3

Front Windshield Wiper Motor M4

Spout Flap Motor M6

Sharpening Stone Lowering Motor M9

Knife Sharpening Motor M10

Adjust End Position Stop of Motor (M10)

Stationary Knife and Kernel Processor Adjusting Motors M11, M12, M13, M14

R.H. and L.H. Side Windshield Wiper Motors M15 and M16

Potentiometers R23 and R24

Calibrating Potentiometers R23 and R24

Sending Units for Electronic Control Unit (ECU) (6750, 6850)

Sending Units for Electronic Control Unit (ECU) (6950)

Replace Sound Sending Unit

Section 50: Power Train

Group 05: Main Drive Belt Replacement

Replace Main Drive Belt

Idler Roll with Support, Exploded View

Deflector Roll, Exploded View

Adjusting Belt Alignment

Group 10: Bevel Gear Drive

Special Tools

Specifications

Remove Angled Drive

Remove Disk Clutch

Clutch Assembly

Disk Clutch Assembly

Hub Components

Check Main Clutch

Main Clutch Assembly

Angled Drive Disassembly

Remove Input Shaft Assembly

Angled Drive Repair

Angled Drive Assembly

Determination of Adjusting Measure for Drive Pinion

Dimension “C”

Dimension “H”

Dimension “G”

Dimension “B”

Install Drive Shaft

Determination of Adjusting Measure for Output Pinion

Dimension “D”

Dimension “F”

Dimension “E”

Dimension “A”

Install Output Shaft

Output Shaft Adjustment

Hydrostatic Drive Shaft

Adjusting End Play of Hydrostatic Drive Shaft

Group 15: Transmission and Differential

Other Material

Specifications

Drain Oil, Remove Suction Screen

Remove Transmission

Remove and Repair Shifter Forks and Shifter Cam

Install Shifter Forks

Install Front Cover With Shifter Cam

Remove and Install Transmission Lube Pump

Transmission Components

Transmission Recondition

Disassemble and Repair Transmission

Remove Pinion Shaft

Remove the Differential.

Disassemble Differential

Assemble the Differential

Assemble Transmission

Install Transmission

Group 20: Final Drives

Special or Essential Tools

Service Equipment and Tools

Other Material

Specifications

Remove Final Drive

Disassemble and Assemble Final Drive

Adjust Spindle Bearing

Attach Final Drive

Final Drive Attaching Screws

Group 25: Hydrostatic Drive, Variable Pump

Special or Essential Tools

Special Tools (Self-Manufactured)

Specifications

Remove Variable Pump

Disassemble Variable Pump- Preparations

Remove Servo Control Valve

Remove Charge Pump

Remove Check Valve

Remove End Cap

Remove Bearing

Remove Servo Cylinders

Remove Front Cover

Remove Servo Piston

Remove Swashplate

Disassemble Swashplate

Swashplate Exploded View

Repair Variable Pump

Check Parts for Wear

Assemble and Install Swashplate

Check Rolling Drag Torque of Swashplate Bearings

Install Servo Piston

Install Servo Cylinder

Attach front cover

Check Drive Shaft Axial Play

Install End Cap

Install Check Valves

Install Charge Pump

Install Servo Control Valve

Install Seal Set

Install Variable Pump

Fill Variable Pump with Oil

Group 30: Hydrostatic Drive, Fixed-Displacement Motor

Special or Essential Tools

Special Tool, Self-Manufactured (Hardwood Mounting Plate)

Special Tool, Self-Manufactured (Puller)

Specifications

Remove Fixed Displacement Motor

Disassemble Fixed Displacement Motor- Preparations

Remove Valve Block

Valve Block Exploded View

Assemble Valve Block

Remove End Cap

Remove bearing

Remove Swashplate

Disassemble Swashplate Parts

Swashplate Assembly Exploded View

Repair Fixed Displacement Motor

Assemble Fixed Displacement Motor

Check Parts for Wear

Check Drive Shaft Axial Play

Install Fixed Displacement Motor

Group 35: Hydrostatic Drive, Oil Change

Specifications

Draining Oil

Refilling Hydrostatic Drive

Group 40: Cam Lobe Motor

Remove Cam Lobe Motor

Repair Cam Lobe Motor

Install Cam Lobe Motor

Section 60: Brakes, Steering and Rear Axle

Group 05: Brake Operation

Remove Brake Master Cylinder

Repair Brake Master Cylinder

Install Brake Master Cylinder

Adjust Yoke at Brake Master Cylinder

Repair Pressure Equalizing Valve

Remove Brake Operating Cylinder

Repair Brake Operating Cylinder

Bleed Brake System

Group 10: Brakes

Remove Brake Drum

Remove Brake Shoe

Repair Brakes

Brake Assembly

Group 15: Hydrostatic Steering

Special or Essential Tools

Specifications

Preliminary Work

Steering Hydraulics

Steering Column Components

Remove the Steering Valve

Steering Valve Components

Disassemble the Steering Valve

Remove Safety Valves

Remove Check Valve

Remove Spool and Sleeve

Disassemble Spool Assembly

Remove Leaf Springs

Remove the Seal Ring

Remove the Safety Valves

Remove Pressure-Control Valve

Repair the Steering Unit

Assemble the Steering Unit

Install Pressure-Control Valve

Install Safety Valves:

Arrange Leaf Springs

Install Leaf Springs

Assemble Spool Assembly

Install Retaining Ring and Cross Pin

Assemble the Thrust Bearing

Install the Seal Ring

Install O-Ring and Back-Up Ring

Install Spool Assembly

Install the Check Valve

Install Safety Valves

Install the O-Ring

Install Distributor Plate and Drive Shaft

Install Rotor and Stator

Insert Spacer Ring

Install Metering Unit Cover

Safety Valve Test

Adjust the Safety Valves

Pressure Control Valve Test

Adjust Pressure-Control Valve

Bleed the Hydrostatic Steering System

Remove the Hydraulic Steering Pump

Hydraulic Pump Exploded View

Steering Hydraulic Circuit

Hydraulic Lines to Steering Cylinders

Remove Steering Cylinder

Dismantle the Steering Cylinders

Steering Cylinder with Ball Joints

Adjust Steering Angle at Steering Cylinder

Tie Rod Exploded View

Toe-In Adjustment

Check Rear Wheel Toe-In

Group 16: ROW-TRAK System

ROW-TRAK System Components

Feeler on Header

Hydraulic Valve Block

Control Unit for ROW-TRAK

Seat switch

Control board

Linear Potentiometer and Steering Cylinder

Check and Adjust the Linear Potentiometer

Requirements for ROW-TRAK ROW-TRAK is a trademark of Deere & Company. Operation

The ROW-TRAKROW-TRAK is a trademark of Deere & Company. System is Switched Off Automatically:

Putting ROW-TRAKROW-TRAK is a trademark of Deere & Company. into Operation

Correcting the ROW-TRAK ROW-TRAK is a trademark of Deere & Company.

Taking ROW-TRAKROW-TRAK is a trademark of Deere & Company. out of Operation

Group 20: Rear Axle.

Standard Rear Axle Exploded View

Adjustable Axle Exploded View

Rear Axle Removal

Rear Axle Installation

Wheel Hub Exploded View

Adjusting Rear Axle Width

Steering Cylinder Retaining Screws on Wheel Motors

Retaining Screws on Wheel Motor Yokes at Sliding Sleeve of Rear Axle

Rear Tire Spacing

Section 70: Hydraulic System

Group 05: Hydraulic Pressure Accumulator

Special or Essential Tools

Specifications

Header Float System Accumulators

Header Float System Accumulators

Header Float System

Check Float System Accumulator Pressure

Recharge 3500 kPa (35 bar; 510 psi) Accumulator

Lower Accumulator Pressure

Main Clutch Accumulator

Group 10: Triple Hydraulic Pump

General repair information

Remove hydraulic pump

Repair Instructions

Mark Hydraulic Pump

Disassemble Hydraulic Pump

Replace Shaft Seal

Gasket and Support Installation

Triple Hydraulic Pump Exploded View

Hydraulic Pump Assembly

Drain hydraulic oil

Temperature and Pressure Sending Units at Hydraulic Oil Tank

Refill Hydraulic Oil

Group 15: Electromagnetic Control Valve

General Repair Information

Solenoids - Left-Hand Side

Solenoids - Right-Hand Side

Remove Left-Hand Solenoid Valve Block

Remove Right-Hand Solenoid Valve Block

Repair Pressure Valve

Repair 3/3 Directional Control Valve Plate

Repair Rate-of-Drop Plate

Repair Reverser Solenoid Valve Plate

Solenoid Valve Plate for Turning Discharge Spout

Plate for Raising/Lowering Discharge Spout

Solenoid Valve Plate for Engaging/Disengaging Main Clutch

Repair Pressure Reduction Unit

Group 20: Reverser Motor

Remove Reverser Motor

Disassemble Reverser Motor

Reverser Motor Repair

Group 25: Hydraulic Motor - Discharge Spout

Specifications

Remove Hydraulic Motor

Disassemble Hydraulic Motor

Hydraulic Motor Exploded View

Hydraulic Motor Repair

Assemble Hydraulic Motor

Section 80: Miscellaneous

Group 05: Fuel Tank Hood

Remove Fuel Tank Hood

Section 90: Operator's Cab, Air Conditioning System

Group 05: Control Levers

Multi-Function Lever

Multi-Function Lever Adjustment

Group 10: Cab Ventilation

Air Intake and Distribution

Adjustable Air Louvers

Group 15: Cab Window Replacement

Special or Essential Tools

Replace Windshield

Remove Windshield

Install Windshield

Replace windshield

Install windshield

Windshield Sectional View

Left-Hand Window Assembly

Right-Hand Window Assembly

Rear Window Installation

Group 20: R134a Air Conditioning System

General Information

Special or Essential Tools

Specifications

Safety at Work

Handling Refrigerant

In An Emergency

Safety Equipment

Storage of Refrigerant Containers

R134a Refrigerant

Test and Service Ports

Service Unit Connection

Discharge System

Evacuate System

Fill the System

Top Up a Partly Discharged System

Fill with Refrigerant Oil FKM10446

Oil Capacities in Air Conditioning Components

Leak Test

Compressor Removal - Preparations

Compressor Removal

Check Compressor Charge

Disassemble Compressor Clutch

Check Clutch Hub Clearance

Check Compressor Manifold

Install Compressor

Condenser Removal and Installation

Remove/Install Receiver-Drier

Remove and Install Evaporator and Expansion Valve

Remove and Install the Thermostat Switch

Remove and Install the High/Low Pressure Switch

Group 25: Super Comfort Seat

Super Comfort Seat DS85H1-02, Exploded View - Lower Section

Remove Seat and Air Suspension

Air Comfort Seat MSG95A-00, Lower Section

Section 100: Harvesting Units

Group 05: Harvesting Unit Cross Drive

Harvesting Unit Cross Drive

Harvesting Unit Drive Exploded View

Drive Assembly

Group 10: Harvesting Units

630/630A (3 m; 10 ft) and 645/645A (4.5 m; 15ft) Pickup

Attaching Frame for 2.14 m (7 ft) Pickup

3-Row Row-Crop Unit

Attaching Frame for 3-Row Row Crop Unit

Adapter Frame for 2.14 m (7 ft) Pickup and 3-Row Row Crop

4-Row Row Crop Unit

Attaching Frame for 4-Row Row Crop Unit

5-Row and 6-Row Row-Crop Units

676 Rotary Harvesting Unit (Row-Independent)

688 Rotary Harvesting Unit (Row-Independent)

684B Rotary Harvesting Unit (Row-Independent) - for North America Only

Corn Heads

Section 110: Feeding System

Group 05: Length-of-Cut Transmission

Specifications

Other Material

General Information

Remove Length-of-Cut Transmission

Length-of-Cut Transmission Disassembly

Location of Shaft Assemblies

Shaft Assembly (AZ)

Shaft Assembly (BZ)

Shaft Assembly (CZ)

Shaft Assembly (DZ)

Shaft Assembly (EZ)

Shaft Assembly (FZ)

Shaft Assembly (GZ)

Shaft Assembly (HZ)

Length-of-Cut Transmission Assembly

Chain Drive Exploded View

Installing Length-of-Cut Transmission

Group 10: Reverser Clutch

Reverser Clutch Exploded View

Reverser Clutch Assembly

Reverser Motor Exploded View

Install Reverser Motor with Clutch

Group 15: Electric Clutch

Specifications

Other Material

Electrical Clutch Exploded View

Electric Clutch Assembly

Clearance Adjustment

Group 20: Feed Roll Channel

Open Feed Roll Channel

Close Feed Roll Channel

Safety Switch at Feed Roll Channel

Group 25: Feed Roll Assembly

Disassemble Feed Roll Assembly

Gear Transmission Exploded View

Remove Smooth Roll

Repair Front Upper Feed Roll

Repair Rear Upper Feed Roll

Repair Front Lower Feed Roll

Repair Rear Lower Feed Roll

Install Smooth Roll

Assemble Feed Roll Assembly

Lateral Guides for Upper Feed Rolls

Group 30: Locking Pawl

Locking Pawl Adjustment

Check Adjustment

Metal Detector Test

Test Chart 1

Test Chart 2

Test Chart 3

Safety Measures

Section 120: Cutterhead Assembly

Group 05: Knife Sharpening Device

Remove Knife Sharpening Device

Worm Gear

Cable Guide, Sharpening Stone Horizontal Movement

Folding Sharpening Device

Replace Sharpening Stone

Group 10: Cutterhead

Special or Essential Tools

Specifications

Cutterhead Removal

Replace Cutterhead and Knife Attaching Parts

Knife Screw Torque

R.H. Side Cutterhead Bearing Installation

L.H. Side Cutterhead Bearing Installation

R.H. Side Cutterhead Bearing Installation

Cutterhead Installation

Install Belt Pulley

Group 15: Bottom and Outlet Bands

Cutterhead Bottom and Outlet Bands

Bottom Band Adjustment

Outlet Band Adjustment

Recirculating Screens

Install/Change Recirculating Screen

Recirculating Screen Adjustment

Bottom and Outlet Band Removal

Install Spiral Floor

Adjustable Spiral Floor Adjustment

Adjustment with Kernel Processor Installed

Group 20: Stationary Knife Removal and Installation

Specifications

Stationary Knife Removal

Remove Stationary Knife Adjusting Device

Install Stationary Knife

Eliminate End Play of Adjusting Spindle

Group 25: Kernel Processor

Specifications

Lubricants

Kernel Processor Removal

Kernel Processor Drive Exploded View

Kernel Processor Housing Exploded View

Grooved Roll Removal

Upper Grooved Roll Exploded View

Lower (Stationary) Grooved Roll, Exploded View

Grooved Roll Installation

Grooved Roll Adjusting Device, Exploded View

Manual Adjustment of Grooved Roll Clearance

Automatic Adjustment of Grooved Rolls

Electrical Adjusting Device Exploded View

Adjust Scrapers

Replace Drive Belts of Lower Roll

Pretension of Lower Roll Drive Belt

Idler and Deflector Pulleys, Exploded View

Idler Pulley Repair

Remove Idler Pulley

Bearing Set Replacement

Install Bearing Set

Group 30: Power Chute

Power Chute Installation

Power Chute Preparation

Attach Power Chute to Hoist

Attach Power Chute

Drive belt

Power Chute - Service and Operation

Power Chute Main Drive Lock

Tension Rear Paddle Drive Belt

Section 130: Discharge Components

Group 05: Discharge Fan

Special or Essential Tools

Special Tool (Self-Manufactured)

Discharge Fan - Exploded View

Replace Wear Plate

Blower Paddle Adjustment

Adjust Deflecting Edges

Group 10: Blower Rotor and Rotor Bearings

Blower Rotor Installed

Blower Rotor Bearings and Supports

Components of Self-Aligning Roller Bearing, Right-Hand

Components of Self-Aligning Roller Bearing, Left-Hand

Group 15: Discharge Spout

Spout Turning Device

Spout Worm Gear and Ring Gear

Spout with Wear Plates

Service Opening and Wear Plates at Spout

Spout Flap Adjusting Motor

Section 210: General Information

Group 05: Specifications

6650, 6750, 6850 and 6950 Forage Harvesters

Group 10: Drive Diagrams

Drive Diagram, 6650 to 6950 With Kernel Processor

Drive Diagram, 6650 to 6950 With Power Chute

Group 15: Ballast Charts

Rear Weights for Forage Harvester With Harvesting Unit Installed

Group 20: Tread Widths

Total Widths and Tread Widths With Adjustable Rear Axle

Section 220: Engine

Group 05: Engine Specifications

Engine Specifications

Explanation of engine type code

6650 Forage Harvester

6750 Forage Harvester

6850 Forage Harvester

6950 Forage Harvester

Emissions According to ECE-R24

Group 10: Engine Tests

Preliminary Engine Test

Dynamometer Test

Determine Engine Horsepower

Dynamometer Connection

Brake Horsepower Specifications

Section 230: Fuel, Air Intake and Cooling Systems

Group 05: Fuel, Air Intake and Cooling Systems

Fuel System - 8.1 L John Deere Engine

Fuel System - 12.5 L John Deere Engine

Fuel System - Cummins Engine

Air Intake System of 6650 to 6950 Forage Harvesters

Rotary Radiator Screen

Cooling Elements, 6650 to 6850

Cooling Elements, 6950

Engine Cooling System, 6950

Viscous Fan Drive of 6650 - 6950 Forage Harvesters

Section 240: Electrical System

Group 05: General Information

Electrical Circuit Malfunctions

Open Circuit

Grounded Circuit

Shorted circuit

How to Read a Functional Schematic

How to Read a Wiring and Harness Diagram

Symbols in System Diagrams

Symbols in System Diagrams

Symbols in System Diagrams

Symbols in System Diagrams

Group 06: Test Equipment

Special or Essential Tools

Multimeter

Wiring Harness Tester

Use of Wiring Harness Tester

Group 10: Electrical System Diagrams

Section Survey

Wiring Harness Survey

Component Survey

Functional Schematic, Sections 1 and 2

Functional Schematic, Section 3E

Functional Schematic, Section 3F

Functional Schematic, Section 3G

Functional Schematic, Section 4

Functional Schematic, Section 5

Functional Schematic, Section 6 - Part 1

Functional Schematic, Section 6 - Part 2

Functional Schematic, Section 6 - Part 3

Functional Schematic, Sections 7 and 8

Functional Schematic, Sections 10 and 11

Functional Schematic, Sections 12A, 12B and 13

Functional Schematic, Section 14

Functional Schematic, Sections 15 and 16A

Functional Schematic, Sections 16B and 17

Functional Schematic, Section 18

Functional Schematic, Sections 19 and 20

Functional Schematic, Sections 21A, 21B and 22

Functional Schematic, Section 23

Functional Schematic, Sections 24 and 25

Functional Schematic, Sections 26 and 27

Functional Schematic, Sections 28 and 29 - Part 1

Functional Schematic, Section 29 - Part 2

Functional Schematic, Section 30

Functional Schematic, Sections 31 and 32

Functional Schematic, Section 33

Functional Schematic, Section 34

Wiring and Harness Diagram of Platform Wiring Harness W1 and Steering Column Wiring Harness W2

Location of Platform Wiring Harness W1 and Steering Column Wiring Harness W2 with Components

Wiring and Harness Diagram of Cutterhead Wiring Harness W3

Location of Cutterhead Wiring Harness W3 with Components

Wiring and Harness Diagram of R.H. Basic Wiring Harness W7

Location of R.H. Basic Wiring Harness W7 with Components - up to Serial No. 503957

Location of R.H. Basic Wiring Harness W7 with Components - from Serial No. 503958

Wiring and Harness Diagram of Engine Wiring Harness W8 (8.1 Liter John Deere Engine)

Location of Engine Wiring Harness W8 with Components (8.1 Liter John Deere Engine)

Wiring and Harness Diagram of L.H. Basic Wiring Harness W9

Location of L.H. Basic Wiring Harness W9 with Components

Wiring and Harness Diagram of Center Basic Wiring Harness W12

Location of Center Basic Wiring Harness W12 with Components

Wiring and Harness Diagram of Cab Wiring Harness W14

Location of Engine Wiring Harness W14 with Components (12.5 Liter John Deere Engine)

Wiring and Harness Diagram of Main Electronic System Wiring Harness W20 (Part 1)

Wiring and Harness Diagram of Main Electronic System Wiring Harness W20 (Part 2)

Location of Main Electronic System Wiring Harness W20 with Components

Wiring and Harness Diagram of Cab Wiring Harness W25 (Part 1)

Wiring and Harness Diagram of Cab Wiring Harness W25 (Part 2)

Wiring and Harness Diagram of Cab Wiring Harness W25 (Part 3)

Wiring and Harness Diagram of Cab Wiring Harness W25 (Part 4)

Wiring and Harness Diagram of Cab Wiring Harness W25 (Part 5)

Location of Cab Wiring Harness W25 with Components

Wiring and Harness Diagram of Wiring Harnesses W25, W26 and W27

Location of Cab Wiring Harness W25, Air Conditioning Wiring Harness W26 and Armrest Wiring Harness W27 with Components

Wiring and Harness Diagram of Switch Console Wiring Harness W28

Location of Switch Console Wiring Harness W28

Wiring and Harness Diagram of Kernel Processor Wiring Harness W29

Location of Kernel Processor Wiring Harness W29 with Components

Wiring and Harness Diagram of Discharge Spout Wiring Harness W34

Location of Discharge Spout Wiring Harness W34

Wiring and Harness Diagram of Socket Wiring Harness W43 (USA-Option)

Location of Socket Wiring Harness W43 (USA-Option)

Wiring and Harness Diagram of Engine Wiring Harness W48 (14 Liter Cummins Engine)

Location of Engine Wiring Harness W48 with Components (14 Liter Cummins Engine)

Wiring and Harness Diagram of 676 Rotary Harvesting Unit Wiring Harness (USA-Option)

Wiring and Harness Diagram of 676 Rotary Harvesting Unit Wiring Harness (USA-Option)

Location of Components on Fuse Board A11

Location of Components on Relay/Diode Board A14

Group 15A: Batteries, Starting Motor, Alternator

Specifications

Operational Information

Theory of Operation

Functional/Diagnostic Schematic of Section 1

Group 15B: Safety Switches, Basic Relays

Operational Information

Theory of Operation

Functional/Diagnostic Schematic of Section 2

Group 15C: Engine Shut-Off Device

Operational Information

SE03E Theory of Operation - John Deere 8.1Liter Engine (Focus ECU)

SE03F Theory of Operation - Cummins 14.0Liter Engine (Cummins ECU)

SE03G Theory of Operation - John Deere 12.5Liter Engine (Focus ECU)

SE03E, SE03F, SE03G Functiona/Diagnostic Schematic

Group 15D: Gauges

Operational information

Theory of Operation

SE04 Functional Schematic

Group 15E: Electronic INFO-TRAK INFO-TRAK is a trademark of Deere & Company Monitor

Operational Information

Input of Specific Machine Data

Software Version

Machine Code

Transmission Speed Ratio Code

Tire Radius Code

Specifications

Determining Tire Radius

Engine Impulse Code

SE05 Functiona/Diagnostic Schematic

Error Codes

Diagnostic Codes for Electronic Control Unit (ECU) (8.1 L Engine) - General

Diagnostic Code List - Electronic Control Unit (ECU), 8.1 L Engine

Self-Test of Engine Electronic System (6950 Only)

Error Codes - Cummins Engine

Group 15H: Turn Discharge Spout

Operational Information

Theory of Operation

SE07 Functional/Diagnostic Schematic of Section 7

Group 15I: Raise/Lower Discharge Spout

Operational Information

Theory of Operation

SE08 Functional/Diagnostic Schematic

Group 15L: Horizontal Reel Adjustment

Operational Information

Theory of Operation

SE10 Functional/Diagnostic Schematic

Group 15M: Raise Reel

Operational Information

Theory of Operation

SE11 Functional/Diagnostic Schematic

Group 15N: Reel Speed Adjustment

Operational Information

Theory of Operation

12A Functiona/Diagnostic Schematic

Group 15O: 676 Rotary Harvesting Unit (North America)

Operational Information

SE12B Functional/Diagnostic Schematic

Group 15P: Attach Trailer

Operational Information

Theory of Operation

SE13 Functional/Diagnostic Schematic

Group 15Q: Header Raise/Lower

Operational Information

Theory of Operation

SE14 Functional/Diagnostic Schematic

Group 15R: Pressure Valves, Trailer Dump

Operational Information

Theory of Operation

SE15 Functional/Diagnostic Schematic

Group 15S: Main Clutch, Reverser

Operational Information

Theory of Operation

SE16 Functional/Diagnostic Schematic

Group 15T: Four-Wheel Drive

Operational Information

Theory of Operation

SE17 Functional/Diagnostic Schematic

Group 15U: Lights

Operational Information

Theory of Operation

SE18 Functional/Diagnostic Schematic

Group 15V: Work Lights

Operational Information

Theory of Operation

SE19 Functional/Diagnostic Schematic

Group 15W: Stop Lights, Horn

Operational Information

Theory of Operation

SE20 Functional/Diagnostic Schematic

Group 15X: Beacon Lights

Operational Information

Theory of Operation

SE 21A, 21B Functional/Diagnostic Schematic

Group 15Y: Fan, Air Conditioning System

Operational Information

Theory of Operation

SE22 Functional/Diagnostic Schematic

Group 15Z: Windshield Wiper/Washer System

Operational Information

Theory of Operation

SE23 Functional/Diagnostic Schematic

Group 15AA: Radio, Interior Lighting

Operational Information

Theory of Operation

SE24 Functional/Diagnostic Schematic

Group 15AB: Rotary Radiator Screen, Reverse Travel Alarm

Operational Information

Theory of Operation

SE25 Functional/Diagnostic Schematic

Group 15AC: Cigarette Lighter, Seat Compressor

Operational Information

SE26 Functional/Diagnostic Schematic

Group 15AD: Spout Rinsing System

Operational Information

Theory of Operation

SE27 Functional/Diagnostic Schematic

Group 15AE: Discharge Spout Flap Adjustment

Operational Information

Theory of Operation

SE28 Functional/Diagnostic Schematic

Group 15AF: Main Electronic System

Operational Information

Theory of Operation

Main Electronic System (A12) Signals

SE29A Functional/Diagnostic Schematic

Group 15AG: Metal Detector

Operational Information

Theory of Operation

Metal Detector Relay Box (A7) Signals

SE30 Functional/Diagnostic Schematic

Group 15AH: Electronic Control Unit

Operational Information

Potentiometer Calibration

Control Unit (A13) Signals

SE31 Functional/Diagnostic Schematic

Group 15AJ: ROW-TRAK System

Operational Information

Theory of Operation

SE23 Functional/Diagnostic Schematic

Group 15AK: POWR-SAVR POWR-SAVR is a trademark of Deere & Company

Operational Information

Theory of Operation

POWR-SAVR POWR-SAVR is a trademark of Deere & Company Control Board (A10A) Signals

SE33 Functional/Diagnostic Schematic

Group 15AL: 676 Rotary Harvesting Unit (North America)

Blade Rotor Brake

SE24 Functional/Diagnostic Schematic

Section 250: Power Train

Group 05: Angled drive

Cutterhead Drive

Angled Drive, Power Distribution

Angled Drive Components

Main Clutch

Hydrostatic/Mechanical Drive System

Group 10: Hydrostatic System

Specifications

Hydrostatic Drive Power Train

Hydrostatic Drive - Operation

Hydrostatic System Circuit Diagram

Hydrostatic Drive Operation, Neutral Position

Hydrostatic Drive Operation, Forward Travel

Hydrostatic Drive Operation, Forward Travel with Four-Wheel Drive

Hydrostatic Drive Operation, Reverse Travel

Hydrostatic Drive Operation, Overload Conditions

Four-Wheel Drive Solenoid Valve, Disengaged Position

Four-Wheel Drive Solenoid Valve, Engaged Position

Four-Wheel Drive Flow Control Valves

Group 15: Three-Speed Transmission

Three-Speed Transmission - Operation

Lubrication of Three-Speed Transmission

Group 20: Hydrostatic System Test

Special or Essential Tools

Hydrostatic System Test

High Pressure Relief Valve Test

Test Ports

Hydrostatic Motor Test Connector

Specifications

Hydrostatic System Test

Check Charge and Flushing Pressures

Checking High Pressure Relief Valves - Preparations

Check High Pressure Relief Valve for Forward Travel

Check High Pressure Relief Valve for Reverse Travel

Overload Relief Valve

Section 260: Brakes, Steering, Rear Axle

Group 05: Brake Operation

Brake Operation

Brake Master Cylinder - Operation

Pressure Equalizing Valve

Group 10: Drum Brake

Drum Brake Components

Group 15: ROW-TRAK ROW-TRAK is a trademark of Deere & Company System

Steering System Components

Description of ROW-TRAK ROW-TRAK is a trademark of Deere & Company

Description of ROW-TRAK ROW-TRAK is a trademark of Deere & Company

Group 20: ROW-TRAK ROW-TRAK is a trademark of Deere & Company Steering Function

ROW-TRAK ROW-TRAK is a trademark of Deere & Company. Steering System Circuit Plan

ROW-TRAK ROW-TRAK is a trademark of Deere & Company Hydraulic Steering Function - Description

Group 25: ROW-TRAK ROW-TRAK is a trademark of Deere & Company Calibration

Calibration of Potentiometer (A)

Select Calibration Mode

System Gain

Steering Ratio

Row Feeler Filtering

Calibrating the Medium Setting of the Potentiometer

Calibrating the Feelers on the Header - General Information

Calibration of Left-Hand Feeler on Row-Dependent Header

Calibration of Right-Hand Feeler on Row-Dependent Header

Calibrate Medium Setting of the Linear Potentiometers

Alternative Method for Calibrating the Medium Setting of the Linear Potentiometers (Driving the Machine not Required)

Calibration of the Hydraulic Valve - Magnetization

Bleed Air From the ROW-TRAK ROW-TRAK is a trademark of Deere & Company. Hydraulic System

Change of Header or Other Components

Calibration of the Feelers on the Header - General Information

ROW-TRAK ROW-TRAK is a trademark of Deere & Company System is Switched Off Automatically

Requirements for ROW-TRAK ROW-TRAK is a trademark of Deere & Company Operation

Switch on ROW-TRAK ROW-TRAK is a trademark of Deere & Company System

Correction of ROW-TRAK ROW-TRAK is a trademark of Deere & Company

Error codes

Section 270: Hydraulic System

Group 05: General Information

Description

Hydraulic Symbols (As Defined by ISO 1219)

Hydraulic Symbols (As Defined by ISO 1219)

Hydraulic System Circuit Diagram

Group 10: Electromagnetic Control Valve

Pressure Valve In Neutral Position

Pressure Valve in Working Position

Pressure Valve with Pressure Relief Valve

Reverser Solenoid Valve Plate in Neutral Position

Reverser Solenoid Valve Plate in Working Position

3/3 Directional Control Valve In Neutral Position

3/3 Directional Control Valve In Neutral Position - Operation

3/3 Directional Control Valve, Lower Harvesting Unit

3/3 Directional Control Valve, Raise Harvesting Unit

Rate-of-Drop Plate

Rate-of-Drop Plate - Operation

Main Clutch Solenoid Valve Plate in Neutral Position

Main Clutch Solenoid Valve Plate in Working Position

Pressure Reduction Valve

4/3 Directional Control Valve Plate in Neutral Position

4/3 Directional Control Valve Plate in Working Position

4/3 Directional Control Valve Plate with Check Valves in Neutral Position

4/3 Directional Control Valve Plate with Check Valves in Working Position

Group 15: Hydraulic System Tests

Special or Essential Tools

Specifications

Hydraulic Components - Neutral Oil Flow

Hydraulic Components - Raising Harvesting Unit, Float, Main Clutch

Hydraulic Components - Reverser Motor, Raising, Lowering and Rotating Spout

Pressure Valve Check

Pressure Reduction Unit Check

Group 20: Header Float System

Check Pressure Switch

Header Float System

Section 290: Operator's Cab

Group 05: Operator's Cab

Operator's Cab

Operator's Seat and Passenger Seat

Air Comfort Seat

Air Conditioning System Components

Heater Components

Compressor with Drive

Air Conditioning and Heater

Air Conditioning Housing

Air Conditioning Housing (Left-Hand Side)

Air Conditioning Housing (Right-Hand Side)

Air Conditioning Housing (Hose Connections)

Temperature Control Switch With Sensor

Air Conditioning Housing In Open Position

Evaporator with Expansion Valve

Air Control Flap

Cab Rear Wall

Heater Control Valve and Air Conditioning System Low Pressure Switch

Cab Air Filter

Group 10: System Diagnosis - Air Conditioning System

R134a Refrigerant

R134a Refrigerant

Safety at Work

Handling Refrigerant

In an Emergency

Safety Equipment

Storage of refrigerant containers

Special or Essential Tools

Specifications

Troubleshooting

Explanation of Checks

Test Sequence

Results of Operational Checks

Air Conditioning System, Checks

Pressure Deviations

Group 15: Operation - Air Conditioning System

Principle of Heat Exchange

Refrigerant Circuit Diagram

Description of how Refrigerant Circuit Functions

Compressor

Condenser

Receiver-Drier

Expansion Valve

Thermostat Switch

Evaporator

Temperature Control and Compressor Switch

De-Icer Switch

Group 20: Operator's Seat - System Diagnosis

Diagnosis, MSG95 Operator's Seat

Fault 1

Fault 2

Fault 3

Fault 4

Fault 5

Fault 6

John Deere Self-Propelled Forage Harvesters Models 6650, 6750, 6850, 6950 (S.N.503681-504430) Diagnosis & Tests Service Manual (TM4621)