John Deere 748H Skidder Operation and Test Technical Manual TM10286 22AUG18

Table of contents
FOREWORD
TECHNICAL INFORMATION FEEDBACK FORM
Section 9000 – GENERAL INFORMATION
Group 01 – Safety Information
Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine Modifications
Inspect Machine
Stay Clear of Moving Parts
Avoid High-Pressure Oils
Avoid High-Pressure Fluids
Do Not Use Starting Fluid
Beware of Exhaust Fumes
Prevent Fires
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator′s Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Operate Machine Safely
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Operating on Slopes
Operating or Traveling On Public Roads
Inspect and Maintain ROPS
Keep the Operator Protective Structure (OPS) in Place
Add and Operate Attachments Safely
Park and Prepare for Service Safely
Service Cooling System Safely
Remove Paint Before Welding or Heating
Make Welding Repairs Safely
Drive Metal Pins Safely
Section 9001 – DIAGNOSTIC TROUBLE CODES (DTC)
Group 10 – Engine Control Unit (ECU)
Engine Control Unit (ECU) Diagnostic Trouble Codes
Throttle Voltage Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Throttle Voltage Out of Range Low Diagnostic Procedure
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Fan Proportional Solenoid Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Program Controller
Component Check
Open Circuit Check
Program Controller
Reversing Fan Switch Active Too Long Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Glow Plug Relay Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Glow Plug Relay Out of Range Low Diagnostic Procedure
Fuse Check
Component Check
Open Circuit Check
Program Controller
Fuse Check
Component Check
Open Circuit Check
Program Controller
Low Pressure Fuel Pump Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Program Controller
Component Check
Open Circuit Check
Program Controller
Low Pressure Fuel Pump Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Program Controller
Component Check
Short Circuit Check
Program Controller
TCU Communication Data Error Diagnostic Procedure
Communication Check
Fuse Check
Relay Check
Transmission Control Unit Check
Ground Circuit Check
CAN Circuit Check
DTC Check
Communication Check
Fuse Check
Relay Check
Transmission Control Unit Check
Ground Circuit Check
CAN Circuit Check
DTC Check
TCU Communication Calibrate Error Diagnostic Procedure
Code Check
CAN Circuit Check
Program Transmission Controller
Program Engine Controller
Code Check
CAN Circuit Check
Program Transmission Controller
Program Engine Controller
SDM Communication Data Error Diagnostic Procedure
Communication Check
Fuse Check
Component Check
Ground Circuit Check
Open Circuit Check
CAN Circuit Check
Program Controller
Communication Check
Fuse Check
Component Check
Ground Circuit Check
Open Circuit Check
CAN Circuit Check
Program Controller
SDM Communication Calibrate Error Diagnostic Procedure
Code Check
CAN Circuit Check
Program SDM Controller
Program ECU Controller
Code Check
CAN Circuit Check
Program SDM Controller
Program ECU Controller
Engine Speed Switch Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Engine Speed Switch Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Program Controller
Component Check
Open Circuit Check
Program Controller
Group 20 – Transmission Control Unit (TCU)
Transmission Control Unit (TCU) Diagnostic Trouble Codes
Oil Temp Sensor Out of Range Diagnostic Procedure
Component Check
Short Circuit Check
Open Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Open Circuit Check
Harness Check
Program Controller
Shift Parameter Erratic or Bad Data Diagnostic Procedure
Fuse Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Fuse Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Request for an Unidentified Shift Being Made Diagnostic Procedure
Fuse Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Fuse Check
Component Check
Short Circuit Check
Harness Check
Program Controller
ECU Communication Data Error Diagnostic Procedure
Communication Check
Fuse Check
Open Circuit Check
CAN Circuit Check
Program Engine Controller
Program Transmission Controller
Communication Check
Fuse Check
Open Circuit Check
CAN Circuit Check
Program Engine Controller
Program Transmission Controller
ECU Communication Calibrate Error Diagnostic Procedure
Code Check
Program Engine Controller
Program Transmission Controller
Code Check
Program Engine Controller
Program Transmission Controller
Park and Not Park Active Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Park and Not Park Active Out of Range Low Diagnostic Procedure
Fuse Check
Component Check
Open Circuit Check
Program Controller
Fuse Check
Component Check
Open Circuit Check
Program Controller
Clutch Valve Supply Voltage Out of Range Low Diagnostic Procedure
Fuse Check
Open Circuit Check
Program Controller
Fuse Check
Open Circuit Check
Program Controller
Output Speed Sensor Condition Exists Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Starter Input Signal High Diagnostic Procedure
Transmission in Neutral Check
Code Check
Component Check
Open Circuit Check
Short Circuit Check
Program Controller
Transmission in Neutral Check
Code Check
Component Check
Open Circuit Check
Short Circuit Check
Program Controller
Solenoid C Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid C Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid B Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid B Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid A Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid A Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 4 Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 4 Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 3 Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 3 Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 2 Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 2 Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Directional Clutch Slip Condition Exists Diagnostic Procedure
Code Check
Code Check
Speed Clutch Slip Condition Exists Diagnostic Procedure
Code Check
Code Check
Inching Pedal Switch Input Invalid Diagnostic Procedure
Component Check
Short Circuit Check
Open Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Open Circuit Check
Harness Check
Program Controller
Inching Pedal Pot Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Inching Pedal Pot Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Not Park and Park Pressure Inputs Passive Diagnostic Procedure
Fuse Check
Component Check
Relay Check
Open Circuit Check
Program Controller
Fuse Check
Component Check
Relay Check
Open Circuit Check
Program Controller
Not Park and Park Pressure Inputs Active Diagnostic Procedure
Component Check
Relay Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Relay Check
Short Circuit Check
Harness Check
Program Controller
Shifter Neutral and Reverse Inputs Active Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Shifter Neutral and Forward Inputs Active Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Neutral Forward Reverse Inputs Passive Diagnostic Procedure
Component Check
Fuse check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Fuse check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Upshift and Downshift Inputs Active Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Output Speed Sensor Out of Range Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Component Check
Open Circuit Check
Short Circuit Check
Calibration Without Park Brake Applied Diagnostic Procedure
Park Brake Applied Check
Code Check
Program Controller
Park Brake Applied Check
Code Check
Program Controller
EEPROM Shift Parameter Condition Diagnostic Procedure
Controller Restart
Program Controller
Controller Restart
Program Controller
Solenoid Group 3 Out of Range High Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Solenoid Group 3 Out of Range Low Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Solenoid Group 2 Out of Range High Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Solenoid Group 2 Out of Range Low Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Solenoid Group 1 Out of Range High Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Solenoid Group 1 Out of Range Low Diagnostic Procedure
Code Check
Program Controller
Code Check
Program Controller
Hold Clutch Pressure Condition Diagnostic Procedure
Code Check
Code Check
Calibrating Clutch Pressure Condition Diagnostic Procedure
Code Check
Code Check
Clutch D Fast Full Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch C Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch B Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch A Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch 4 Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch 3 Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch 2 Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Clutch 1 Fast Fill Time Condition Diagnostic Procedure
Code Check
Code Check
Cylinder Speed With Reverse Clutch Condition Diagnostic Procedure
Code Check
Code Check
Cylinder Speed With Forward Clutch Condition Diagnostic Procedure
Code Check
Code Check
Cylinder Speed Condition Diagnostic Procedure
Code Check
Code Check
Engine Speed Too Low For Calibration Diagnostic Procedure
Engine Speed Check
Code Check
Program Controller
Engine Speed Check
Code Check
Program Controller
Engine Speed Too High For Calibration Diagnostic Procedure
Engine Speed Check
Code Check
Program Controller
Engine Speed Check
Code Check
Program Controller
Sump Temp Too Low For Calibration Diagnostic Procedure
Temperature Check
Code Check
Program Controller
Temperature Check
Code Check
Program Controller
Solenoid 1 Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid 1 Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Solenoid D Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Solenoid D Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Forward and Reverse Inputs Active Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Clutch Temperature Moderately High Value Diagnostic Procedure
Code Check
Code Check
Dual Mode Steer Output Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Dual Mode Steer Output Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Dual Mode Steer Switch Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Dual Mode Steer Switch Out of Range Low Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Top of Clutch Input Passive Abnormal Data Rate Diagnostic Procedure
Inching Pedal Check
Component Check
Open Circuit Check
Program Controller
Inching Pedal Check
Component Check
Open Circuit Check
Program Controller
Group 30 – Standard Display Monitor (SDM)
Standard Display Monitor (SDM) Diagnostic Trouble Codes
Fuel Level Sender Fault Out of Range High Diagnostic Procedure
Component Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Short Circuit Check
Harness Check
Program Controller
Fuel Level Sender Fault Out of Range Low Diagnostic Procedure
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Engine Air Filter Restriction Data Above Normal Diagnostic Procedure
Air Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Air Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Transmission Oil Filter Restriction Data Above Normal Diagnostic Procedure
Transmission Oil Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Transmission Oil Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
System Voltage Data Above Normal Diagnostic Procedure
Alternator Check
Program Controller
Alternator Check
Program Controller
System Voltage Data Below Normal Diagnostic Procedure
Fuse Check
Alternator Check
Voltage Check
Open Circuit Check
VEC Check
Program Controller
Fuse Check
Alternator Check
Voltage Check
Open Circuit Check
VEC Check
Program Controller
Engine Air Filter Data Above Normal Diagnostic Procedure
Air Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Air Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Hydraulic Oil Temperature Sensor Data Above Normal Diagnostic Procedure
Hydraulic Oil Temperature Check
Component Check
Program Controller
Hydraulic Oil Temperature Check
Component Check
Program Controller
Hydraulic Oil Temp Sensor Out of Range High Diagnostic Procedure
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Component Check
Open Circuit Check
Short Circuit Check
Harness Check
Program Controller
Hydraulic Oil Temp Sensor Out of Range Low Diagnostic Procedure
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Component Check
Short Circuit Check
Open Circuit Check
Program Controller
Hydraulic Oil Temp Sensor Moderately High Value Diagnostic Procedure
Hydraulic Oil Temperature Check
Component Check
Program Controller
Hydraulic Oil Temperature Check
Component Check
Program Controller
Hydraulic Oil Filter Restriction Data Above Normal Diagnostic Procedure
Hydraulic Oil Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
Hydraulic Oil Filter Check
Component Check
Short Circuit Check
Harness Check
Program Controller
ECU Communication Data Error Diagnostic Procedure
Communication Check
Fuse Check
Voltage Check
Ground Circuit Check
CAN Circuit Check
Program ECU Controller
Program SDM Controller
Communication Check
Fuse Check
Voltage Check
Ground Circuit Check
CAN Circuit Check
Program ECU Controller
Program SDM Controller
ECU Communication Calibrate Error Diagnostic Procedure
Code Check
CAN Circuit Check
Program ECU Controller
Program SDM Controller
Code Check
CAN Circuit Check
Program ECU Controller
Program SDM Controller
TCU Communication Data Error Diagnostic Procedure
Code Check
Fuse Check
Relay Check
Voltage Check
Ground Circuit Check
Open Circuit Check
VEC Power Circuit Check
VEC Ground Circuit Check
CAN Circuit Check
DTC Check
Program SDM Controller
Code Check
Fuse Check
Relay Check
Voltage Check
Ground Circuit Check
Open Circuit Check
VEC Power Circuit Check
VEC Ground Circuit Check
CAN Circuit Check
DTC Check
Program SDM Controller
002003.13 – TCU Communication Calibrate Error
Section 9005 – OPERATIONAL CHECKOUT
Group 10 – Operational Checks
Miscellaneous Checks
Battery Disconnect Switch Check
Monitor, Gauges and Indicator Lights Check
De-clutch Indicator Check
Windshield Washer and Wiper Checks
Work Lights and Deluxe Work Lights Check—If Equipped
Horn Switch Check
Blade Control Valve Linkage Check
Neutral Start Circuit Check
Cold Start Dump Valve Check
Start Circuit, Seat Belt/Park Brake Indicator Checks
Engine Speed Controls and Air Filter Restriction Check
Transmission Gear Selector Position and Reverse Alarm Check
Service Brake Linkage Check
Brake Accumulator Precharge Check
Brake Valve Neutral Leakage Check
Service Brake Check
Inching Pedal Check
Service Brake Drag Check
Park Brake Check
Steering System Operation Check
Secondary Steering System Check
Transmission Cold Weather Disconnect Clutch Check
Transmission Noise Check
Differential Lock Capacity and Differential Lock Indicator Check
Differential Gears and Pinion Noise Check
Hydraulic Pump Performance Check
Blade and Grapple Control Valve Functional Check
Blade and Grapple System Leakage Checks
Blade and Grapple Function Drift Check
Grapple Rotate System Crossover Relief Check
Grapple Rotate Rotation Check
Solenoid Activated Grapple Rotate and Grapple Open/Close For Single Lever Pilot Control Check
Grapple Latch Function for Single Lever Pilot Control Check
Grapple Valve Arch and Grapple Section Lift Check
Grapple Valve Boom Section Lift Check (Dual Function)
Arch or Boom Cylinder Leakage Check
Grapple Dampener Check
Grapple Shock Absorber Check
Tong Timing Check
Winch Hydraulic System Functional Check
Winch Valve Return Spring Check
Winch Control Valve Linkage Stop Check
Winch Free Spool, Drum, and Cable Check
Winch Drum Drag Check
Brake Off Adjustment Check
Brake Off Function and Control Linkage Checks
Winch Clutch and Brake Check
Winch Fairlead Roller Check
Defroster, Heater and Air Conditioner Functional Check
Reversing Fan Switch Check
Fuel Tank Strainer Check
Service Decal Check
Battery Disconnect Switch Check
Monitor, Gauges and Indicator Lights Check
De-clutch Indicator Check
Windshield Washer and Wiper Checks
Work Lights and Deluxe Work Lights Check—If Equipped
Horn Switch Check
Blade Control Valve Linkage Check
Neutral Start Circuit Check
Cold Start Dump Valve Check
Start Circuit, Seat Belt/Park Brake Indicator Checks
Engine Speed Controls and Air Filter Restriction Check
Transmission Gear Selector Position and Reverse Alarm Check
Service Brake Linkage Check
Brake Accumulator Precharge Check
Brake Valve Neutral Leakage Check
Service Brake Check
Inching Pedal Check
Service Brake Drag Check
Park Brake Check
Steering System Operation Check
Secondary Steering System Check
Transmission Cold Weather Disconnect Clutch Check
Transmission Noise Check
Differential Lock Capacity and Differential Lock Indicator Check
Differential Gears and Pinion Noise Check
Hydraulic Pump Performance Check
Blade and Grapple Control Valve Functional Check
Blade and Grapple System Leakage Checks
Blade and Grapple Function Drift Check
Grapple Rotate System Crossover Relief Check
Grapple Rotate Rotation Check
Solenoid Activated Grapple Rotate and Grapple Open/Close For Single Lever Pilot Control Check
Grapple Latch Function for Single Lever Pilot Control Check
Grapple Valve Arch and Grapple Section Lift Check
Grapple Valve Boom Section Lift Check (Dual Function)
Arch or Boom Cylinder Leakage Check
Grapple Dampener Check
Grapple Shock Absorber Check
Tong Timing Check
Winch Hydraulic System Functional Check
Winch Valve Return Spring Check
Winch Control Valve Linkage Stop Check
Winch Free Spool, Drum, and Cable Check
Winch Drum Drag Check
Brake Off Adjustment Check
Brake Off Function and Control Linkage Checks
Winch Clutch and Brake Check
Winch Fairlead Roller Check
Defroster, Heater and Air Conditioner Functional Check
Reversing Fan Switch Check
Fuel Tank Strainer Check
Service Decal Check
Section 9010 – ENGINE
Group 05 – Theory of Operation
Engine Fuel System Component Location
Engine Cooling System Component Location
Engine Fluid Sample Port Locations
Cold Weather Starting Aid
Group 15 – Diagnostic Information
PowerTech Plus™ 4.5 L and 6.8 L (4045 and 6068) John Deere Engines
Engine Will Not Crank
Faulty Battery or Connections
Fuse Check
Park Brake Switch Checks
Transmission Gear Selector Checks
Relay Checks
Faulty Battery or Connections
Fuse Check
Park Brake Switch Checks
Transmission Gear Selector Checks
Relay Checks
Engine Coolant Temperature Above Normal
Preliminary Checks
Air Filter Check
Electrical Check
Cooling Fan System Check
Preliminary Checks
Air Filter Check
Electrical Check
Cooling Fan System Check
Engine Coolant Temperature Below Normal
Coolant Temperature Check
Thermostat Check
Electrical Component Check
Coolant Temperature Check
Thermostat Check
Electrical Component Check
Group 25 – Tests
Fuel Line Leakage Test
Air Intake System Leakage Test
Air Filter Restriction Switch Test
Engine Slow and Fast Idle Speed Check
Section 9015 – ELECTRICAL SYSTEM
Group 05 – System Information
Electrical Diagram Information
Group 10 – System Diagrams
Fuse Specifications
System Functional Schematic, Wiring Diagrams and Component Locations Legend
System Functional Schematic and Section Legend
Cab Roof Harness (W9) Component Location
Cab Roof Harness (W9) Wiring Diagram
Load Center Harness (W10) Component Location
Load Center Harness (W10) Wiring Diagram
Engine Interface Harness (W11) Component Location
Engine Interface Harness (W11) Wiring Diagram
Engine Harness (W12) Component Location
Engine Harness (W12) Wiring Diagram
Transmission Harness (W13) Component Location
Transmission Harness (W13) Wiring Diagram
Hydraulic Reservoir Harness (W14) Component Location
Hydraulic Reservoir Harness (W14) Wiring Diagram
Fuel Sensor and Backup Alarm Harness (W15) Component Location
Fuel Sensor and Backup Alarm Harness (W15) Wiring Diagram
Radio Harness (W17) Component Location
Radio Harness (W17) Wiring Diagram
Secondary Steering Harness (W19) Component Location
Secondary Steering Harness (W19) Wiring Diagram
Grapple Rotate and Open/Close Harness (W24) Component Location—Pilot Control
Grapple Rotate and Open/Close Harness (W24) Wiring Diagram—Pilot Control
Grapple Rotate Harness (W25) Component Location—Mechanical Linkage
Group 15 – Sub-System Diagnostics
Power and Charging Circuits Theory of Operation
Start Circuit Theory of Operation
Park Brake Circuit Theory of Operation
Controller Area Network (CAN) Circuit Theory of Operation
Engine Control Unit (ECU) Circuits Theory of Operation
Proportional Fan Speed and Reversing Fan Circuits Theory of Operation
Transmission Control Unit (TCU) Circuits Theory of Operation
Standard Display Monitor (SDM) Circuits Theory of Operation
Grapple Control Circuit Theory of Operation
Secondary Steering Circuit Theory of Operation
Dual Mode Steer Circuit Theory of Operation
De-clutch Circuit Theory of Operation (S.N. 620843—)
Group 16 – Monitor Operation
Standard Display Monitor (SDM) Operation
Standard Display Monitor (SDM) Menu Structure—Service Mode
Standard Display Monitor (SDM)—Temperature Format
Standard Display Monitor (SDM)—Change Units
Standard Display Monitor (SDM)—Hide—Unhide Main Menu
Group 20 – References
Electrical Component Specifications
Diagnostic Trouble Codes (DTC) Quick Reference List
Service ADVISOR™ Connection Procedure
Reading Diagnostic Trouble Codes with Service ADVISOR™ Diagnostic Application
Transmission Diagnostic Trouble Codes—Limp Home Mode and Inchless Power Shift
Calibration of Transmission Control Unit (TCU)
Troubleshooting Transmission Gear Solenoid Diagnostic Trouble Codes
Controller Area Network (CAN) Diagnostics
System Check
CAN Termination Resistor Check
CAN Hi Wire Voltage Check
CAN Lo Wire Voltage Check
CAN Hi Wire Circuit Check
CAN Lo Wire Circuit Check
Controller Check
System Check
CAN Termination Resistor Check
CAN Hi Wire Voltage Check
CAN Lo Wire Voltage Check
CAN Hi Wire Circuit Check
CAN Lo Wire Circuit Check
Controller Check
Two-Wire Sensor Circuit Check Using Standard Display Monitor (SDM) or SERVICE ADVISOR SERVICE ADVISOR is a trademark of Deere & Company
Three-Wire Sensor Circuit Check Using Standard Display Monitor (SDM) or SERVICE ADVISOR SERVICE ADVISOR is a trademark of Deere & Company
Bump Shifter Test
Bump Shifter Default Gear Selection
Relay Test
Diode Test
Diode Module Test
Alternator Test
Battery Test Procedure
Connector Terminal Test Diagnostic Procedure
Terminal Visual Inspection
Terminal Test Loose Fit Check
Terminal Test Crimp Check
Terminal Visual Inspection
Terminal Test Loose Fit Check
Terminal Test Crimp Check
Remove and Install Transmission Control Unit (TCU)
Remove and Install Engine Control Unit (ECU)
Remove and Install Single Lever Pilot Control Relays
Replace DEUTSCH DEUTSCH is a trademark of Deutsch Co. Rectangular or Triangular Connectors
Replace DEUTSCH DEUTSCH is a trademark of the 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
Replace SURE-SEAL SURE-SEAL is a trademark of ITT Cannon Electric. Connector with 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
Crimper Tool For Transmission Control Unit Connector—Operation
Crimper Tool For Transmission Control Unit Connector—Remove And Install Die Set
Crimper Tool For Transmission Control Unit Connector—Contact Support Adjustment
Crimper Tool For Transmission Control Unit Connector—Crimping Procedure
Crimper Tool For Transmission Control Unit Connector—Crimp Height Inspection
Crimper Tool For Transmission Control Unit Connector—Crimp Height Adjustment
Replace Transmission Control Unit Connector Terminals
Cinch CP Connector Assemble
Cinch CP Connector Terminal Removal
Cinch CP Connector Terminal Hand Crimp Process
Transmission Control Unit (TCU) Remove and Install
Engine Control Unit (ECU) Remove and Install
Single Lever Pilot Control Relays Remove and Install
Section 9020 – POWER TRAIN
Group 05 – Theory of Operation
Power Train Component Overview
DF180 Series Powershift Transmission
TEAMMATE TEAMMATE is a trademark of Deere & Company Axles
Transmission Operation
Transmission Component Identification
Transmission Diagram
Transmission Hydraulic System Operation
Transmission Charge Pump Operation
Transmission Filter Bypass Valve Operation
Transmission Control Valve Port Identification
Transmission Proportional Solenoid Valves Identification
Transmission Control Valve Operation
Transmission Pressure Regulator Valve Operation
Park Brake and Differential Lock Control Valve
Park Brake Control Circuit
Park Brake Manual Release Operation
Differential Lock Control Circuit
Cold Weather Transmission Disconnect Operation—If Equipped
Group 15 – Diagnostic Information
Transmission Overfills With Oil Diagnostic Procedure
Diagnostic Trouble Code Check
Hydraulic Pump Seal Leaking Check
Check Winch
Diagnostic Trouble Code Check
Hydraulic Pump Seal Leaking Check
Check Winch
Transmission Clutch Slippage Diagnostic Procedure
Diagnostic Trouble Code Check
Oil Level Check
Oil Type or Viscosity Check
Inching Pedal Out of Adjustment
Transmission Filter Bypassing Oil
Transmission System Pressure Check
Transmission Control Valve Orifice Check
Transmission Manifold Plate Check
Transmission Control Valve Check
Transmission Pump Flow Check
Pressure Regulating Valve Check
Transmission Clutch Pressure Check
Clutch Pack Check
Diagnostic Trouble Code Check
Oil Level Check
Oil Type or Viscosity Check
Inching Pedal Out of Adjustment
Transmission Filter Bypassing Oil
Transmission System Pressure Check
Transmission Control Valve Orifice Check
Transmission Manifold Plate Check
Transmission Control Valve Check
Transmission Pump Flow Check
Pressure Regulating Valve Check
Transmission Clutch Pressure Check
Clutch Pack Check
Transmission Shifts Too Slow Diagnostic Procedure
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Transmission Oil Level Check
Transmission Filter Restricted Check
Sticking Transmission Solenoid Valve
Transmission Pump Flow Check
Transmission System Pressure Check
Clutch Pack Leakage Check
Transmission Control Valve Check
Transmission Manifold Plate Check
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Transmission Oil Level Check
Transmission Filter Restricted Check
Sticking Transmission Solenoid Valve
Transmission Pump Flow Check
Transmission System Pressure Check
Clutch Pack Leakage Check
Transmission Control Valve Check
Transmission Manifold Plate Check
Transmission Shifts Too Fast Diagnostic Procedure
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Transmission System Pressure Check
Transmission Control Valve Check
Transmission Clutch Pack Check
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Transmission System Pressure Check
Transmission Control Valve Check
Transmission Clutch Pack Check
Park Brake Activates When Service Brakes Are Applied (No Load on Engine While in Gear) Diagnostic Procedure
Diagnostic Trouble Code Check
Service Brake Line Is Broken Check
No Pressure to Service Brake Valve Check
Accumulator Check
Diagnostic Trouble Code Check
Service Brake Line Is Broken Check
No Pressure to Service Brake Valve Check
Accumulator Check
Machine Will Not Move (Load on Engine or Engine Stalls When Shifted Into Gear) Diagnostic Procedure
Diagnostic Trouble Code Check
Service Brake Valve Adjustment Check
Service Brake Valve Check
Park Brake Dragging Check
Differential Check
Proportional Solenoid Check
Transmission Problem Check
Diagnostic Trouble Code Check
Service Brake Valve Adjustment Check
Service Brake Valve Check
Park Brake Dragging Check
Differential Check
Proportional Solenoid Check
Transmission Problem Check
Machine Creeps in Neutral (Load Put on Engine When Service Brakes are Applied) Diagnostic Procedure
Diagnostic Trouble Code Check
Proportional Solenoid Stuck Open Check
Warped Clutch Disks and Plates Check
Diagnostic Trouble Code Check
Proportional Solenoid Stuck Open Check
Warped Clutch Disks and Plates Check
Transmission System Overheats Diagnostic Procedure
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Extended Fast Transport Speed Operation Check
Transmission Overfilled With Oil Check
Transmission Filter Restricted Check
Transmission Cooler Problem Check
Oil Cooler Plugged Check
Pinched Oil Line or Hose Check
Low Transmission Pump Output Check
Clutch Pack Disks and Plates Worn Check
Diagnostic Trouble Code Check
Oil Type or Viscosity Check
Extended Fast Transport Speed Operation Check
Transmission Overfilled With Oil Check
Transmission Filter Restricted Check
Transmission Cooler Problem Check
Oil Cooler Plugged Check
Pinched Oil Line or Hose Check
Low Transmission Pump Output Check
Clutch Pack Disks and Plates Worn Check
Lube Pressure Low, Transmission Charge Pressure Normal Diagnostic Procedure
Diagnostic Trouble Code Check
Lube Relief Valve Stuck Open Check
Low Transmission Pump Output Check
Diagnostic Trouble Code Check
Lube Relief Valve Stuck Open Check
Low Transmission Pump Output Check
Excessive Transmission Noise Under Load or No Load Diagnostic Procedure
Diagnostic Trouble Code Check
Low Oil Level Check
Low or No Lube Pressure Check
Drive Shaft Yokes Damaged or Not in Line Check
Bent Drive Shaft (Winch or Main) Check
Transmission Mechanical Problem Check
Diagnostic Trouble Code Check
Low Oil Level Check
Low or No Lube Pressure Check
Drive Shaft Yokes Damaged or Not in Line Check
Bent Drive Shaft (Winch or Main) Check
Transmission Mechanical Problem Check
Machine Makes Excessive Transmission Noise When Moving Diagnostic Procedure
Diagnostic Trouble Code Check
Low Oil Level Check
Brakes Dragging Check
Wheel Bearing Check
Drive Shaft Check
Axle Mechanical Check
Transmission Mechanical Check
Diagnostic Trouble Code Check
Low Oil Level Check
Brakes Dragging Check
Wheel Bearing Check
Drive Shaft Check
Axle Mechanical Check
Transmission Mechanical Check
Erratic Transmission Oil Pressure Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Oil Level Check
Transmission Oil Aerated Check
Foreign Object in Suction Port Check
Diagnostic Trouble Code Check
Transmission Oil Level Check
Transmission Oil Aerated Check
Foreign Object in Suction Port Check
Excessive Transmission Oil Pressure Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Pressure Regulator Valve Check
Regulator Spring Check
Diagnostic Trouble Code Check
Transmission Pressure Regulator Valve Check
Regulator Spring Check
Low Transmission Oil Pressure in All Gears Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Filter Check
Transmission Regulator Valve Check
Charge Pump Check
Control Valve Body Check
Control Valve Body Cracked Check
Diagnostic Trouble Code Check
Transmission Filter Check
Transmission Regulator Valve Check
Charge Pump Check
Control Valve Body Check
Control Valve Body Cracked Check
Low Transmission Oil Pressure in One Gear but Correct in Other Gears Diagnostic Procedure
Diagnostic Trouble Code Check
Proportional Solenoid Connection Check
Proportional Solenoid Sticking in Control Valve Check
Transmission Clutch Pack Check
Diagnostic Trouble Code Check
Proportional Solenoid Connection Check
Proportional Solenoid Sticking in Control Valve Check
Transmission Clutch Pack Check
Transmission Oil Cooler Externally Leaking Diagnostic Procedure
Transmission Oil Cooler Hose Fittings
Transmission Oil Cooler is Return Line Restricted
Transmission Oil Cooler is Restricted
Transmission Oil Cooler Relief is Stuck or Restricted
Transmission Cooler Accumulator is Discharged
Transmission Oil Cooler Hose Fittings
Transmission Oil Cooler is Return Line Restricted
Transmission Oil Cooler is Restricted
Transmission Oil Cooler Relief is Stuck or Restricted
Transmission Cooler Accumulator is Discharged
Transmission Breather Oil Leakage Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Oil Level Check
Charge Pump Suction Tube Check
Diagnostic Trouble Code Check
Transmission Oil Level Check
Charge Pump Suction Tube Check
Filter or Filter Oil Lines Blow Out Diagnostic Procedure
Diagnostic Trouble Code Check
Filter and O-Ring Check
Hose Check
System Plumbing Check
Filter Bypass Valve Check
Transmission Regulator Valve Check
Diagnostic Trouble Code Check
Filter and O-Ring Check
Hose Check
System Plumbing Check
Filter Bypass Valve Check
Transmission Regulator Valve Check
Low Lube Pressure (Not All Gears) Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Clutch Circuit Leakage Check
Diagnostic Trouble Code Check
Transmission Clutch Circuit Leakage Check
Excessive Lube Pressure (Not All Gears) Diagnostic Procedure
Diagnostic Trouble Code Check
Seal Ring Leakage Check
Diagnostic Trouble Code Check
Seal Ring Leakage Check
Low Transmission Oil Cooler Inlet Pressure, Correct Lube Pressure Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Filter Check
Diagnostic Trouble Code Check
Transmission Filter Check
Low Transmission Oil Cooler Inlet Pressure and Lube Pressure Diagnostic Procedure
Diagnostic Trouble Code Check
Transmission Pump Flow Check
Leakage Between Valve Housing and Rear Transmission Case Check
Proportional Solenoid Valve O-Ring Leakage Check
Diagnostic Trouble Code Check
Transmission Pump Flow Check
Leakage Between Valve Housing and Rear Transmission Case Check
Proportional Solenoid Valve O-Ring Leakage Check
Machine ‘Jumps” When Inching Pedal Engaged Diagnostic Procedure
Diagnostic Trouble Code Check
Inching Pedal Out of Adjustment Check
Transmission Controller Out of Calibration
Diagnostic Trouble Code Check
Inching Pedal Out of Adjustment Check
Transmission Controller Out of Calibration
Machine Lacks Power Diagnostic Procedure
Diagnostic Trouble Code Check
Air Cleaner Restricted
Transmission Oil Level Check
Transmission Filter Restricted Check
Park Brake Check (Park Brake Light On)
Park Brake Check (Park Brake Light Off)
Park Brake Solenoid Valve Check
Transmission System Pressure Check
Transmission Control Valve Orifice Check
Transmission Manifold Plate Check
Transmission Control Valve Check
Transmission Pump Flow Check
Pressure Regulating Valve Check
Transmission Clutch Pressure Check
Clutch Pack Check
Diagnostic Trouble Code Check
Air Cleaner Restricted
Transmission Oil Level Check
Transmission Filter Restricted Check
Park Brake Check (Park Brake Light On)
Park Brake Check (Park Brake Light Off)
Park Brake Solenoid Valve Check
Transmission System Pressure Check
Transmission Control Valve Orifice Check
Transmission Manifold Plate Check
Transmission Control Valve Check
Transmission Pump Flow Check
Pressure Regulating Valve Check
Transmission Clutch Pressure Check
Clutch Pack Check
Excessive Machine Vibration Diagnostic Procedure
Diagnostic Trouble Code Check
Engine Check
Engine Mounting Hardware Check
Axle Mechanical Check
Transmission Mechanical Check
Diagnostic Trouble Code Check
Engine Check
Engine Mounting Hardware Check
Axle Mechanical Check
Transmission Mechanical Check
Disconnect Clutch Noisy or Chatters Diagnostic Procedure
Splines Not Engaged
Linkage Worn or Out of Adjustment
Splines Damaged
Broken Spring
Linkage Worn or Out of Adjustment
Broken Spring
Cracked or Broken Dampener
Flywheel Loose on Crankshaft
Splines Not Engaged
Linkage Worn or Out of Adjustment
Splines Damaged
Broken Spring
Linkage Worn or Out of Adjustment
Broken Spring
Cracked or Broken Dampener
Flywheel Loose on Crankshaft
Excessive Drive Line Vibration Diagnostic Procedure
Yokes Not in Line on Telescoping Drive Shafts
Worn Rear Drive Line Support Bearing
Bent Drive Shaft
Drive Shaft Excessively Worn
Front Axle Oscillation Supports Loose
Yokes Not in Line on Telescoping Drive Shafts
Worn Rear Drive Line Support Bearing
Bent Drive Shaft
Drive Shaft Excessively Worn
Front Axle Oscillation Supports Loose
Park Brake Comes On While Using a Hydraulic Function Diagnostic Procedure
Service Brake Accumulator Faulty
Service Brake Accumulator Faulty
Park Brake Engages While Machine Is Moving Diagnostic Procedure
Service Brake Pressure Switch Check
Service Brake Pressure Switch Check
Park Brake Will Not Release Diagnostic Procedure
Low Park Brake Pressure Check
Park Brake Switch Check
Service Brake Pressure Switch Check
Low Park Brake Pressure Check
Park Brake Switch Check
Service Brake Pressure Switch Check
No Differential Lock Operation Diagnostic Procedure
Fuse Blown
Transmission Filter Restricted
Differential Lock Switch or Solenoid Problem.
Differential Lock Relay Problem
Oil Passage Restricted
Differential Lock Pistons Stuck in Bore
Excessive Differential Wear
Fuse Blown
Transmission Filter Restricted
Differential Lock Switch or Solenoid Problem.
Differential Lock Relay Problem
Oil Passage Restricted
Differential Lock Pistons Stuck in Bore
Excessive Differential Wear
Differential Lock Slippage Diagnostic Procedure
Skidder Overloaded
Low Actuation Pressure
Differential Lock Pistons Stuck in Bore
Excessive Differential Wear
Skidder Overloaded
Low Actuation Pressure
Differential Lock Pistons Stuck in Bore
Excessive Differential Wear
Excessive Differential and/or Axle Noise Diagnostic Procedure
Low Differential Oil Level
Rear Drive Shaft Carrier Bearing Failure
Axle Bearing Failure
Mechanical Axle Failure
Pinion Bearing Failure
Gear Mesh Pattern Incorrect
Differential Failure
Differential Lock Pistons Stuck in Bore
Planetary Failure
Low Differential Oil Level
Rear Drive Shaft Carrier Bearing Failure
Axle Bearing Failure
Mechanical Axle Failure
Pinion Bearing Failure
Gear Mesh Pattern Incorrect
Differential Failure
Differential Lock Pistons Stuck in Bore
Planetary Failure
Oil Seepage From Outer Axle Seal Diagnostic Procedure
Seal Failure
Excessive Axle End Play
Seal Failure
Excessive Axle End Play
Power Train Component Location
Group 20 – Adjustments
Inching Pedal Adjustment
Park Brake Manual Release Procedure
Cold Weather Disconnect Linkage Adjustment—If Equipped
Group 25 – Tests
Transmission Oil Warm-Up Procedure
Transmission Pump Flow Test
Transmission System Pressure Test
Transmission Lube Circuit Pressure Test
Transmission Control Circuit Pressure Test
Transmission Cooler Relief Valve Pressure Test
Park Brake Pressure Test
Differential Lock Pressure Test
Section 9025 – HYDRAULIC SYSTEM
Group 05 – Theory of Operation
Hydraulic System Operation
Main Pump and Reservoir Hydraulic Circuit Operation
Cooling Loop and Reversing Fan Circuit Operation
Service Brake Hydraulic Circuit Operation
Steering and Secondary Steering Hydraulic Circuit Operation
Dual Mode Steering Hydraulic Circuit Operation
Pilot Control Hydraulic Circuit Operation
Grapple Rotate Hydraulic Circuit Operation
Main Hydraulic Pump and Pressure Compensator Operation
Brake Accumulator Operation
Hydraulic Reservoir Operation
Hydraulic Oil Return Filter Operation
Hydraulic Fan Filter Operation
Brake Valve Operation
Priority Valve Operation
Steering Valve and System Operation
Secondary Steering Inlet Manifold Operation
120 Series Cylinder Operation
Blade Manually Operated Valve Section Operation
Arch and Boom Pilot Operated Valve Section Operation
System Relief Valve Operation
Circuit Relief Valve—Adjustable with Anticavitation Operation
Circuit Relief Valve—Non-Adjustable Operation
Grapple Tong Flow Divider Operation
Pilot Controller Operation
Grapple Rotate Solenoid Valve Operation
Dual Mode Steering Solenoid Valve Operation
Rotary Manifold Operation
Fan Pump Operation
Fan Variable Speed and Reversing Manifold Operation
Reversing Fan Motor Operation
Hydraulic Oil Cooler Operation
Cab Tilt Circuit Operation
Group 15 – Diagnostic Information
Hydraulic System Overheating Diagnostic Procedure
Low Oil Level
Wrong Oil
Hydraulic Oil Cooler Air Flow Restricted
Oil Flow Restricted
Cooling Fan Circuit Malfunction
System Relief Valve Stuck Open
Low Oil Level
Wrong Oil
Hydraulic Oil Cooler Air Flow Restricted
Oil Flow Restricted
Cooling Fan Circuit Malfunction
System Relief Valve Stuck Open
Hydraulic Function Drifts Down Diagnostic Procedure
Cylinders Leaking
Circuit Relief Valve Leaking
System Relief Valve Setting Too Low
Pressure Compensator Problem
Grapple Close Circuit Relief Valve Setting Too Low
Pilot Controller Spool Sticking
Control Valve Leaking
Orifice Check Problem
Excessive Leakage in Hydraulic System
Cylinders Leaking
Circuit Relief Valve Leaking
System Relief Valve Setting Too Low
Pressure Compensator Problem
Grapple Close Circuit Relief Valve Setting Too Low
Pilot Controller Spool Sticking
Control Valve Leaking
Orifice Check Problem
Excessive Leakage in Hydraulic System
No Steering or Hydraulic Functions Diagnostic Procedure
Low Oil Level
Main Hydraulic Pump Drive Problem
Main Hydraulic Pump Problem
Drive Dampener Failure or Cold Weather Disconnect Problem
Low Oil Level
Main Hydraulic Pump Drive Problem
Main Hydraulic Pump Problem
Drive Dampener Failure or Cold Weather Disconnect Problem
Hydraulic Functions Slow Diagnostic Procedure
Low Oil Level
Low Standby Pressure
Low System Relief Pressure
Oil Leaking Through Steering Valve
Worn Hydraulic Pump
Low Oil Level
Low Standby Pressure
Low System Relief Pressure
Oil Leaking Through Steering Valve
Worn Hydraulic Pump
Individual Functions Slow (Cycle Time Slow) Diagnostic Procedure
Excessive Leakage in Circuit
Low Circuit Relief Pressure
Pilot Controller Spool Sticking
Cylinders Leaking
Excessive Leakage in Circuit
Low Circuit Relief Pressure
Pilot Controller Spool Sticking
Cylinders Leaking
No Hydraulic Functions (Steering Normal) Diagnostic Procedure
Priority Valve Stuck
Priority Valve Stuck
Low Hydraulic Power (Pressure) Diagnostic Procedure
Low Oil Level
Low Standby Pressure
Low System Relief Pressure
Excessive Leakage in Hydraulic System
Worn Hydraulic Pump
Low Oil Level
Low Standby Pressure
Low System Relief Pressure
Excessive Leakage in Hydraulic System
Worn Hydraulic Pump
Excessive Hydraulic Pump Noise Diagnostic Procedure
Low Oil Level
Inlet Hose Clamps Loose
Main Hydraulic Pump Problem
Pump Drive Problem
Low Oil Level
Inlet Hose Clamps Loose
Main Hydraulic Pump Problem
Pump Drive Problem
Function Powers Up or Down Without Moving Lever Diagnostic Procedure
Control Valve Leaking
Pilot Controller Spool Stuck
Control Valve Leaking
Pilot Controller Spool Stuck
Grapple Rotate Stalls Diagnostic Procedure
Grapple Rotate Motor Does Not Rotate With Arch Fully Raised
Rotate Motor Relief Valves Set Too Low
Grapple Rotate Motor Does Not Rotate With Arch Fully Raised
Rotate Motor Relief Valves Set Too Low
Grapple Rotates Too Fast Diagnostic Procedure
Improper Orifice Size
Improper Orifice Size
Grapple Rotates Slow Diagnostic Procedure
Orifice Plates Plugged
Air In Rotate Circuit
Orifice Plates Plugged
Air In Rotate Circuit
Tongs Do Not Close Evenly Diagnostic Procedure
Tongs Are Out-of-Time
Leaking Tong Cylinder
Flow Divider Valve Problem
Tongs Are Out-of-Time
Leaking Tong Cylinder
Flow Divider Valve Problem
Tongs Open or Close Slowly Diagnostic Procedure
Leakage In Rotary Manifold
Low Grapple Tong Circuit Relief Valve Pressure Setting
Leaking Tong Cylinder
Leakage In Rotary Manifold
Low Grapple Tong Circuit Relief Valve Pressure Setting
Leaking Tong Cylinder
Grapple Loses Logs During Skidding Diagnostic Procedure
Grapple Latch Not Functioning
Grapple Control Out of Detent Position
Low Grapple Tong Circuit Relief Valve Pressure Setting
Leaking Tong Cylinder
Flow Divider Valve Problem
Grapple Latch Not Functioning
Grapple Control Out of Detent Position
Low Grapple Tong Circuit Relief Valve Pressure Setting
Leaking Tong Cylinder
Flow Divider Valve Problem
Transmission Overfills With Oil Diagnostic Procedure
Main Hydraulic Pump Drive Shaft Seal Leaking
Fan Pump Drive Shaft Seal Leaking
Hoses Switched at Articulation Joint
Main Hydraulic Pump Drive Shaft Seal Leaking
Fan Pump Drive Shaft Seal Leaking
Hoses Switched at Articulation Joint
No Steering (Hydraulic Functions Normal) Diagnostic Procedure
Steering Column Shaft Damaged
Steering Valve Damaged
Priority Valve Spring Broken
Priority Valve Relief Valve Stuck.
Priority Valve Spool Stuck
Steering Column Shaft Damaged
Steering Valve Damaged
Priority Valve Spring Broken
Priority Valve Relief Valve Stuck.
Priority Valve Spool Stuck
Steering Valve Does Not Center Diagnostic Procedure
Steering Valve Contaminated
High Back Pressure
Steering Cylinders Leaking
Steering Valve Contaminated
High Back Pressure
Steering Cylinders Leaking
Steering Valve Locks Up Diagnostic Procedure
Thermal Shock
Priority Valve Not Functioning
Worn or Damaged Steering Valve
Thermal Shock
Priority Valve Not Functioning
Worn or Damaged Steering Valve
Frames Turn Wrong Direction Diagnostic Procedure
Lines Connected To Wrong Ports
Lines Connected To Wrong Ports
Steering Slow or Hard Diagnostic Procedure
Steering Valve-to-Column Joint Binding
Low Priority Valve Pressure Setting
Priority Valve Spool Sticking
Main Hydraulic Pump Flow Low
Steering Valve-to-Column Joint Binding
Low Priority Valve Pressure Setting
Priority Valve Spool Sticking
Main Hydraulic Pump Flow Low
Steering Erratic or Spongy Diagnostic Procedure
Air In System
Priority Valve Spool Sticking
Steering Valve Problem
Air In System
Priority Valve Spool Sticking
Steering Valve Problem
Machine Wanders Diagnostic Procedure
Air In System
Steering System Leakage
Centering Spring Broken
Air In System
Steering System Leakage
Centering Spring Broken
Quick Steer Mode Not Engaging Diagnostic Procedure
Pressure Reducing Valve Pilot Pressure Low
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Pressure Reducing Valve Pilot Pressure Low
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Quick Steer Mode Not Engaging Diagnostic Procedure
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Quick Steer Mode Not Disengaging Diagnostic Procedure
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Electrical Malfunction
Dual Mode Steering Solenoid Problem
Hydraulic Line Plugged
Steering Valve Problem
Quick Steer Mode Engaging When Disengaged Diagnostic Procedure
Electrical Malfunction
Hydraulic Hose Connections Are Incorrect
Electrical Malfunction
Hydraulic Hose Connections Are Incorrect
Poor or No Brakes (Other Hydraulic Systems Normal) Diagnostic Procedure
Brake Pressure Low
Service Brake Valve Leakage
Brake Facings Worn
Service Brake Piston Seal Leakage
Brake Pressure Low
Service Brake Valve Leakage
Brake Facings Worn
Service Brake Piston Seal Leakage
Brakes Overly Aggressive Diagnostic Procedure
Service Brake Valve Problem
System Pressure High
Service Brake Valve Problem
System Pressure High
Brakes Drag Diagnostic Procedure
Brake Pedal Problem
Service Brake Valve Problem
Brake Disk Warped
Service Brake Piston Stuck
Brake Pedal Problem
Service Brake Valve Problem
Brake Disk Warped
Service Brake Piston Stuck
Brakes Chatter or Noisy Diagnostic Procedure
Air In Brake System
Brake Facings Worn
Air In Brake System
Brake Facings Worn
Delay in Braking Diagnostic Procedure
Air in Brake System
Air in Brake System
Fan Does Not Reach Full Speed (Both Directions) Diagnostic Procedure
Check for Correct Electrical Signals
Oil Supply Problem
Fan Pump Malfunction
Fan Pump Coupling Malfunction
Proportional Solenoid Valve Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Hydraulic Fan Motor Malfunction
Fan Coupling Malfunction
Check for Correct Electrical Signals
Oil Supply Problem
Fan Pump Malfunction
Fan Pump Coupling Malfunction
Proportional Solenoid Valve Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Hydraulic Fan Motor Malfunction
Fan Coupling Malfunction
Fan Does Not Reach Full Speed (Forward Direction Only) Diagnostic Procedure
Check for Correct Electrical Signals
Fan Reverse Solenoid Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Fan Coupling Malfunction
Check for Correct Electrical Signals
Fan Reverse Solenoid Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Fan Coupling Malfunction
Fan Does Not Reach Full Speed (Reverse Direction Only) Diagnostic Procedure
Check for Correct Electrical Signals
Fan Reverse Solenoid Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Fan Coupling Malfunction
Check for Correct Electrical Signals
Fan Reverse Solenoid Malfunction
Fan Reverse Pilot Valve Malfunction
Check Valve Malfunction
Fan Coupling Malfunction
Fan Does Not Spin (Both Directions) Diagnostic Procedure
Check for Correct Electrical Signals
Fan Pump Malfunction
Fan Pump Drive Coupling Malfunction
Fan Motor Coupling Malfunction
Check for Correct Electrical Signals
Fan Pump Malfunction
Fan Pump Drive Coupling Malfunction
Fan Motor Coupling Malfunction
Fan Does Not Slow Down Before Reversing Diagnostic Procedure
Check for Correct Electrical Signals
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
Check for Correct Electrical Signals
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
High Cooler Pressure or Pressure Spikes Diagnostic Procedure
Soft Hose
Check Valve Malfunction
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
Soft Hose
Check Valve Malfunction
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
High Return Pressure at Fan Manifold Port T Diagnostic Procedure
Hydraulic Fan Filter Restricted
Hydraulic Oil Cooler Restricted
Check Valve Malfunction
Hydraulic Fan Filter Restricted
Hydraulic Oil Cooler Restricted
Check Valve Malfunction
High Flow From Fan Motor Case Drain Diagnostic Procedure
Hydraulic Fan Motor Malfunction
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
Hydraulic Fan Motor Malfunction
Proportional Solenoid Valve Malfunction
Timing Orifice Plugged
Fan Pump is Cavitating Diagnostic Procedure
Oil Supply Problem
Suction Hose Problem
Oil Supply Problem
Suction Hose Problem
Hydraulic System Component Location
Hydraulic System Schematic
Group 20 – Adjustments
Service Brake Pedal Adjustment
Service Brake Inspection and Adjustment
Service Brake Bleeding Procedure
Grapple Dampener Adjustment
Group 25 – Tests
D15032NU Vacuum Pump Installation
JT02156A Digital Pressure and Temperature Analyzer Installation
JT07148 Digital Hydraulic Tester
Hydraulic Oil Warm-Up Procedure
Main Hydraulic Pump Identification
Main Hydraulic Pump Standby Pressure Test
Main Hydraulic Pump Flow Test
Main Hydraulic Pump Leakage Test
Pressure Reducing Valve Pressure Test
Pilot Controller Pressure Test
Priority Valve and Relief Valve Pressure Test
Priority Valve “LS” Port Flow Test
Priority Valve and Relief Valve Leakage Test
System and Circuit Relief Valve Pressure Test
Hydraulic Component Leakage Test
Cylinder Leakage Test
Cylinder Drift Test
Dual Mode Steering Engagement Pressure Test
Grapple Rotate Motor Crossover Relief Valve Pressure Test
Grapple Rotate Solenoid Valve Neutral Leakage Test
Grapple Tong Flow Divider Relief Valve Test
Rotary Manifold Center Seal Leakage Test
Rotary Manifold Drain and Lower Seal Leakage Test
Service Brake Valve and Accumulator Pressure Test
Service Brake Valve Leakage Test
Steering Valve Neutral Leakage Test
Hydraulic Functions Cycle Time Test
Hydraulic Oil Filter Inspection Procedure
Cooling Fan Circuit Test Procedure
Fan Motor Case Drain Test
Secondary Steering Operation Test
Section 9030 – WINCH
Group 05 – Theory of Operation
John Deere 4000 and 6000 Winches
Group 15 – Diagnostic Information
Winch Control Lever Effort Excessive Diagnostic Procedure
Control Lever Linkage Check
Control Cable Check
Valve Spool Check
Control Lever Linkage Check
Control Cable Check
Valve Spool Check
Winch Clutch Slips Diagnostic Procedure
Transmission Filter Check
Transmission Oil Level Check
Control Lever Linkage Check
Transmission System Pressure Check
Transmission Leakage Check
Winch Control Circuit Leakage Check
Winch Clutch Check
Transmission Filter Check
Transmission Oil Level Check
Control Lever Linkage Check
Transmission System Pressure Check
Transmission Leakage Check
Winch Control Circuit Leakage Check
Winch Clutch Check
Winch Free Spool Effort Excessive Diagnostic Procedure
Winch Cable Check
Free Spool Drag Screw Check
Oil Viscosity Check
Control Lever Linkage Check
Winch Drum Rolling Drag Check
Lube Pressure Check
Winch Cable Check
Free Spool Drag Screw Check
Oil Viscosity Check
Control Lever Linkage Check
Winch Drum Rolling Drag Check
Lube Pressure Check
Winch Brake Will Not Hold
Winch Will Not Free Spool Diagnostic Procedure
Transmission Filter Check
Control Lever Linkage Check
Winch System Pressure Check
Winch Free Spool Check
Transmission Filter Check
Control Lever Linkage Check
Winch System Pressure Check
Winch Free Spool Check
Transmission Oil Level Varies Excessively Diagnostic Procedure
Winch Oil Level Check
Standpipe O-Ring Check
Winch Oil Level Check
Standpipe O-Ring Check
Winch Makes Grinding Noise When Going from FREE SPOOL to BRAKE OFF
Winch Component Location
Winch Hydraulic Schematic
Group 20 – Adjustments
Winch Control Cable Adjustment Check
Brake Off Adjustment—4000 Series Winch
Brake Off Adjustment—6000 Series Winch
Group 25 – Test
Winch System Pressure Test
Winch Leakage Test
Winch Drum Rolling Drag Test
Section 9031 – HEATING AND AIR CONDITONING
Group 05 – Theory Of Operation
Air Conditioning System Cycle Of Operation
Group 15 – Diagnostic Information
Interior Windows Continuously Foggy
A/C and Heater Fuse Is Bad
Blower Motor Switch Faulty
A/C and Defrost Switch Faulty
A/C and Heater Relay Failure
A/C Freeze Control Switch Failure
A/C Pressure Switch Failure
Compressor Clutch Failure
Wiring Harness Problem
Fresh Air Filter Restricted
Condenser Fins Restricted
Recirculating Air Filter Restricted
Compressor Belt Loose
Damaged Refrigerant Hose
Heater or Evaporator Core Restricted
Blower Motor Failure
Compressor Clutch Faulty
Warm Air Leaking Into Cab
Heater Valve Remaining Open
System Refrigerant Charge Low
Evaporator Fins Freezing
Engine Compartment Baffle Missing or Damaged.
Freeze Control Capillary Tube Out Of Position
Freeze Control Switch Malfunction
Compressor Clutch Constantly Engaged
Fresh Air Filter Restricted
Air Conditioning System Off
A/C and Heater Fuse Is Bad
Blower Motor Switch Faulty
A/C and Defrost Switch Faulty
A/C and Heater Relay Failure
A/C Freeze Control Switch Failure
A/C Pressure Switch Failure
Compressor Clutch Failure
Wiring Harness Problem
Fresh Air Filter Restricted
Condenser Fins Restricted
Recirculating Air Filter Restricted
Compressor Belt Loose
Damaged Refrigerant Hose
Heater or Evaporator Core Restricted
Blower Motor Failure
Compressor Clutch Faulty
Warm Air Leaking Into Cab
Heater Valve Remaining Open
System Refrigerant Charge Low
Evaporator Fins Freezing
Engine Compartment Baffle Missing or Damaged.
Freeze Control Capillary Tube Out Of Position
Freeze Control Switch Malfunction
Compressor Clutch Constantly Engaged
Fresh Air Filter Restricted
Air Conditioning System Off
Interior Windows are Foggy
Fuse Blown
Blower Motor Switch Failure
Blower Motor Resistor Failure
Wiring Harness Problem
Fresh Air Filter Restricted
Recirculating Air Filter Restricted
No Flow to Heater Core
Heater Clogged With Dirt or Dust
Blower Motor Failed
Heater Valve Stuck
Fresh Air Filter Restricted
A/C System Turned Off
Fuse Blown
Blower Motor Switch Failure
Blower Motor Resistor Failure
Wiring Harness Problem
Fresh Air Filter Restricted
Recirculating Air Filter Restricted
No Flow to Heater Core
Heater Clogged With Dirt or Dust
Blower Motor Failed
Heater Valve Stuck
Fresh Air Filter Restricted
A/C System Turned Off
Air Conditioning System Component Location
Group 25 – Tests
Air Conditioning System Checks
R134a Air Conditioning System Test
Air Conditioner Freeze Control Switch Test
Air Conditioning Compressor Clutch Test
Air Conditioning High/Low Pressure Switch Test
Air Conditioning Expansion Valve Test
Refrigerant Leak Test