Complete Diagnosis & Tests Technical Manual with electrical wiring diagrams for John Deere 770G, 770GP, 772G, and 772GP Motor Graders, with workshop information to maintain, diagnose, and rebuild like professional mechanics.
John Deere 770G, 770GP, 772G, and 772GP Motor Graders workshop Diagnosis & Tests technical 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.
tm14076x19 – John Deere 770G, 770GP, 772G, and 772GP Motor Graders Technical Manual (Operation and Test).pdf
tm14076x63 – Motoniveladoras 770G, 770GP, 772G y 772GP
Category: Operation and Test
Language: Spanish
Published on 2019/08/26
French
tm14076x28 – Motoniveleuses 770G, 770GP, 772G et 772GP
Published on 2019/08/26
Portuguese
tm14076x54 – Motoniveladoras 770G, 770GP, 772G e 772GP
Published on 2019/09/13
Russian
tm14076x59 – 770G, 770GP, 772G и 772GP Автогрейдеры
Published on 2019/09/13
PRODUCT DETAILS:
Total Pages: 2,212 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English
TABLE OF CONTENTS…………….1
Section 9000: General Information…………….40
Group 01: Safety…………….40
Information for European Union Directives and Eurasian Economic Union Technical Regulations Compliance…………….46
Recognize Safety Information…………….50
Follow Safety Instructions…………….51
Operate Only If Qualified…………….52
Wear Protective Equipment…………….53
Avoid Unauthorized Machine Modifications…………….54
Inspect Machine…………….55
Stay Clear of Moving Parts…………….56
Avoid High-Pressure Fluids…………….57
Avoid High-Pressure Oils…………….58
Work In Ventilated Area…………….59
Avoid Static Electricity Risk When Refueling…………….60
High Debris Applications…………….62
Prevent Fires…………….63
In Case of Machine Fire…………….64
Prevent Battery Explosions…………….65
Handle Chemical Products Safely…………….66
Handle Starting Fluid Safely…………….67
Decommissioning — Proper Recycling and Disposal of Fluids and Components…………….68
Prepare for Emergencies…………….69
Clean Debris from Machine…………….70
Use Steps and Handholds Correctly…………….71
Start Only From Operator's Seat…………….72
Use and Maintain Seat Belt…………….73
Prevent Unintended Machine Movement…………….74
Avoid Work Site Hazards…………….76
Keep Riders Off Machine…………….78
Avoid Backover Accidents…………….79
Avoid Machine Tip Over and Machine Damage…………….80
Operating or Traveling On Public Roads…………….81
Inspect and Maintain ROPS…………….82
Travel Safely…………….83
Prevent Acid Burns…………….84
Add and Operate Attachments Safely…………….86
Park and Prepare for Service Safely…………….87
Service Cooling System Safely…………….88
Remove Paint Before Welding or Heating…………….89
Make Welding Repairs Safely…………….90
Drive Metal Pins Safely…………….91
Service Tires Safely…………….92
Use Proper Lifting Equipment…………….93
Section 9001: Diagnostics…………….94
Group 10: Transmission Control Unit (TCU) Diagnostic Trouble Codes…………….115
Transmission Control Unit (TCU) Diagnostic Trouble Codes…………….115
000070.03 – Park Brake Pressure Switch Circuit Fault…………….94
000070.04 – Park Brake Pressure Switch Circuit Fault…………….94
000177.00 – Transmission Oil Temperature High…………….94
000177.03 – Transmission Oil Temperature Sensor Circuit Fault…………….94
000177.04 – Transmission Oil Temperature Sensor Circuit Fault…………….94
000177.16 – Transmission Oil Temperature High…………….94
000237.02 – Invalid VIN…………….94
000237.14 – VIN Options Not Learned…………….94
000237.31 – VIN Message Missing…………….94
000444.03 – Unswitched Battery Voltage…………….94
000444.04 – Unswitched Battery Voltage…………….94
000525.02 – Undefined Gear…………….94
000525.07 – Undefined Gear…………….94
000525.12 – Undefined Gear…………….94
000619.03 – Transmission Park Circuit Fault…………….94
000619.05 – Transmission Park Circuit Fault…………….94
000619.06 – Transmission Park Circuit Fault…………….94
000619.07 – Park Fault…………….94
000619.31 – Park Fault…………….94
000628.12 – Control Unit Programming…………….94
001231.12 – Communication System Message Missing…………….94
001231.14 – Communication System Message Fault…………….94
002000.02 – Communication System Fault…………….94
002000.09 – Communication System Message Missing…………….94
002003.09 – Communication System Message Missing…………….94
002033.02 – Communication System Fault…………….94
002033.09 – Communication System Message Missing…………….94
002034.09 – Communication System Message Missing…………….94
002141.09 – Communication System Message Missing…………….94
002161.02 – Communication System Message Missing…………….94
002161.09 – Communication System Message Missing…………….95
002213.02 – Communication System Message Missing…………….95
002213.09 – Communication System Message Missing…………….95
002225.02 – Communication System Message Missing…………….95
002225.09 – Communication System Message Missing…………….95
002833.07 – Movement While Park Brake Applied…………….95
002833.31 – Park Fault…………….95
003510.03 – TCU Sensor Supply #2…………….95
003510.04 – TCU Sensor Supply #2…………….95
003511.03 – TCU Sensor Supply #3…………….95
003511.04 – TCU Sensor Supply #3…………….95
516321.03 – Switched Battery Voltage…………….95
516321.04 – Switched Battery Voltage…………….95
516755.03 – Transmission Rev Circuit Fault…………….95
516755.05 – Transmission Rev Circuit Fault…………….95
516755.06 – Transmission Rev Circuit Fault…………….95
516770.03 – Transmission Left Rev Lamp Circuit Fault…………….95
516770.05 – Transmission Left Rev Lamp Circuit Fault…………….95
516770.06 – Transmission Left Rev Lamp Circuit Fault…………….95
516773.03 – Transmission Right Rev Lamp Circuit Fault…………….95
516773.05 – Transmission Right Rev Lamp Circuit Fault…………….95
516773.06 – Transmission Right Rev Lamp Circuit Fault…………….95
517056.12 – End of Line File – EOL…………….95
517056.31 – End of Line File – EOL…………….95
521601.12 – End of Line File – EOL…………….95
521601.31 – End of Line File – EOL…………….95
522087.07 – Park Fault…………….95
522087.31 – Park Fault…………….95
522252.00 – Clutch 1 Hold Pressure Too High…………….95
522252.01 – Clutch 1 Hold Pressure Too Low…………….95
522253.00 – Clutch 2 Hold Pressure Too High…………….95
522253.01 – Clutch 2 Hold Pressure Too Low…………….95
522254.00 – Clutch 3 Hold Pressure Too High…………….95
522254.01 – Clutch 3 Hold Pressure Too Low…………….96
522255.00 – Clutch 4 Hold Pressure Too High…………….96
522255.01 – Clutch 4 Hold Pressure Too Low…………….96
522256.00 – Clutch A Hold Pressure Too High…………….96
522256.01 – Clutch A Hold Pressure Too Low…………….96
522257.00 – Clutch B Hold Pressure Too High…………….96
522257.01 – Clutch B Hold Pressure Too Low…………….96
522258.00 – Clutch C Hold Pressure Too High…………….96
522258.01 – Clutch C Hold Pressure Too Low…………….96
522259.00 – Clutch D Hold Pressure Too High…………….96
522259.01 – Clutch D Hold Pressure Too Low…………….96
522414.00 – Transmission Clutch Temperature Fault…………….96
522414.03 – Transmission Clutch D Solenoid Circuit Fault…………….96
522414.05 – Transmission Clutch D Solenoid Circuit Fault…………….96
522414.06 – Transmission Clutch D Solenoid Circuit Fault…………….96
522507.14 – Transmission Calibration Fault…………….96
522517.31 – Engine Stall Prevention Active…………….96
523438.31 – End of Line File – EOL…………….96
523655.03 – Forward and Reverse Both Active…………….96
523697.03 – Inching Pedal Circuit Fault…………….96
523697.04 – Inching Pedal Circuit Fault…………….96
523697.31 – Inching Pedal System Fault…………….96
523699.31 – Transmission Speed Clutch Slipping…………….96
523700.31 – Transmission Clutch Slipping…………….96
523708.03 – Inching Pedal Circuit Fault…………….96
523708.04 – Inching Pedal Circuit Fault…………….96
523708.31 – Inching Pedal Circuit Fault…………….96
523712.31 – Transmission Calibration Fault…………….96
523717.31 – Transmission Calibration Fault…………….96
523718.31 – Transmission Calibration Fault…………….96
523720.00 – Clutch Fill Time Too Long…………….96
523720.01 – Clutch Fill Time Too Short…………….96
523721.00 – Clutch Fill Time Too Long…………….96
523721.01 – Clutch Fill Time Too Short…………….97
523722.00 – Clutch Fill Time Too Long…………….97
523722.01 – Clutch Fill Time Too Short…………….97
523723.00 – Clutch Fill Time Too Long…………….97
523723.01 – Clutch Fill Time Too Short…………….97
523724.00 – Clutch Fill Time Too Long…………….97
523724.01 – Clutch Fill Time Too Short…………….97
523725.00 – Clutch Fill Time Too Long…………….97
523725.01 – Clutch Fill Time Too Short…………….97
523726.00 – Clutch Fill Time Too Long…………….97
523726.01 – Clutch Fill Time Too Short…………….97
523727.00 – Clutch Fill Time Too Long…………….97
523727.01 – Clutch Fill Time Too Short…………….97
523728.31 – Transmission Calibration Fault…………….97
523729.31 – Transmission Calibration Fault…………….97
523730.31 – Transmission Calibration Fault…………….97
523731.31 – Transmission Calibration Fault…………….97
523732.31 – Transmission Calibration Fault…………….97
523733.31 – Transmission Calibration Fault…………….97
523734.31 – Transmission Calibration Fault…………….97
523761.00 – Transmission Clutch Temperature Fault…………….97
523761.03 – Transmission Clutch Circuit Fault…………….97
523761.05 – Transmission Clutch Circuit Fault…………….97
523761.06 – Transmission Clutch Circuit Fault…………….97
523762.00 – Transmission Clutch Temperature Fault…………….97
523762.03 – Transmission Clutch Circuit Fault…………….97
523762.05 – Transmission Clutch Circuit Fault…………….97
523762.06 – Transmission Clutch Circuit Fault…………….97
523763.00 – Transmission Clutch Temperature Fault…………….97
523763.03 – Transmission Clutch Circuit Fault…………….97
523763.05 – Transmission Clutch Circuit Fault…………….97
523763.06 – Transmission Clutch Circuit Fault…………….97
523764.00 – Transmission Clutch Temperature Fault…………….97
523764.03 – Transmission Clutch Circuit Fault…………….98
523764.05 – Transmission Clutch Circuit Fault…………….98
523764.06 – Transmission Clutch Circuit Fault…………….98
524173.00 – Inching Pedal Circuit Fault…………….98
524173.01 – Inching Pedal Circuit Fault…………….98
524173.03 – Inching Pedal Circuit Fault…………….98
524173.04 – Inching Pedal Circuit Fault…………….98
524173.12 – Inching Pedal System Fault…………….98
524173.31 – Inching Pedal Circuit Fault…………….98
524271.00 – Transmission Clutch Temperature Fault…………….98
524271.03 – Transmission Clutch Circuit Fault…………….98
524271.05 – Transmission Clutch Circuit Fault…………….98
524271.06 – Transmission Clutch Circuit Fault…………….98
524272.00 – Transmission Clutch Temperature Fault…………….98
524272.03 – Transmission Clutch Circuit Fault…………….98
524272.05 – Transmission Clutch Circuit Fault…………….98
524272.06 – Transmission Clutch Circuit Fault…………….98
524273.00 – Transmission Clutch Temperature Fault…………….98
524273.03 – Transmission Clutch Circuit Fault…………….98
524273.05 – Transmission Clutch Circuit Fault…………….98
524273.06 – Transmission Clutch Circuit Fault…………….98
Group 20: Engine Control Unit (ECU) Diagnostic Trouble Codes…………….376
Engine Control Unit (ECU) Diagnostic Trouble Codes…………….376
000029.03 – Decel Pedal Short to Power…………….98
000091.03 – Accel Pedal Short to Power…………….98
000091.04 – Accel Pedal Open or Short…………….98
000107.00 – Engine Air Filter Restricted…………….98
000596.31 – Engine Speed Control Enable Switch Fault…………….98
000600.31 – Engine Speed Accel/Decel Switch Fault…………….98
001196.31 – ECU Anti Theft Locked…………….98
001321.05 – Starter Relay Open Circuit…………….98
001321.06 – Starter Relay High Current…………….98
001321.30 – Starter Engaged for 30 Seconds…………….98
001321.31 – Starter Sol Open Circuit…………….99
002003.09 – CAN Comm Lost for TCU…………….99
002033.09 – CAN Comm Lost for VCU…………….99
Group 30: Primay Display Unit (PDU) Diagnostic Trouble Codes…………….99
Primary Display Unit (PDU) Diagnostic Trouble Codes…………….398
000237.02 – Vehicle Identification Number…………….99
000237.13 – Vehicle Identification Number…………….99
000237.31 – Vehicle Identification Number…………….99
000629.12 – Control Unit Fault…………….99
000920.03 – Audible Alarm Circuit Fault…………….99
000920.04 – Audible Alarm Circuit Fault…………….99
002000.09 – Communication System Fault…………….99
516628.10 – Display Button – UP…………….99
516629.10 – Display Button – DOWN…………….99
516630.10 – Display Button – SELECT…………….99
517057.12 – EE Vehicle Hours Checksum Failure…………….99
517170.10 – Display Button – LEFT…………….99
517171.10 – Display Button – RIGHT…………….99
521859.10 – Display Button – MENU…………….99
524050.12 – Real Time Clock…………….99
Group 40: Vehicle Control Unit (VCU) Diagnostic Trouble Codes…………….417
Vehicle Control Unit (VCU) Diagnostic Trouble Codes…………….417
000096.03 – Fuel Level Sensor Circuit Fault…………….99
000096.04 – Fuel Level Sensor Circuit Fault…………….99
000117.01 – Service Brake Pressure Low…………….99
000117.03 – Service Brake Accumulator Switch Circuit Fault…………….99
000117.04 – Service Brake Accumulator Switch Circuit Fault…………….99
000167.03 – Switched Power Circuit Fault…………….99
000167.04 – Switched Power Circuit Fault…………….99
000168.03 – Unswitched Power Circuit Fault…………….99
000168.04 – Unswitched Power Circuit Fault…………….99
000237.02 – Vehicle Identification Fault…………….99
000237.13 – Vehicle Identification Fault…………….99
000237.31 – Vehicle Identification Fault…………….100
000583.03 – Mainfall Sensor Circuit Fault…………….100
000583.04 – Mainfall Sensor Circuit Fault…………….100
000628.12 – Control Unit Programming…………….100
000629.12 – Control Unit Fault…………….100
000639.12 – Communication System Message Missing…………….100
000639.14 – Communication System Fault…………….100
000746.03 – Differential Lock Solenoid Circuit Fault…………….100
000746.05 – Differential Lock Solenoid Circuit Fault…………….100
000746.06 – Differential Lock Solenoid Circuit Fault…………….100
000876.03 – A/C Compressor Clutch Circuit Fault…………….100
000876.05 – A/C Compressor Clutch Circuit Fault…………….100
000876.06 – A/C Compressor Clutch Circuit Fault…………….100
000880.03 – Stop Lamp Circuit (Red) Fault…………….100
000880.05 – Stop Lamp Circuit (Red) Fault…………….100
000880.06 – Stop Lamp Circuit (Red) Fault…………….100
000977.03 – Reversing Fan Solenoid Circuit Fault…………….100
000977.05 – Reversing Fan Solenoid Circuit Fault…………….100
000977.06 – Reversing Fan Solenoid Circuit Fault…………….100
000977.07 – Reversing Fan Pressure High…………….100
001045.04 – Brake Light Switch Circuit Fault…………….100
001071.03 – Fan Speed Solenoid Circuit Fault…………….100
001071.04 – Fan Speed Solenoid Circuit Fault…………….100
001071.05 – Fan Speed Solenoid Circuit Fault…………….100
001071.06 – Fan Speed Solenoid Circuit Fault…………….100
001231.12 – Communication System Message Missing…………….100
001231.14 – Communication System Fault…………….100
001569.31 – Engine Derated…………….100
001638.00 – Hydraulic Oil Temperature High…………….100
001638.03 – Hydraulic Oil Temperature Sensor Circuit Fault…………….100
001638.04 – Hydraulic Oil Temperature Sensor Circuit Fault…………….100
001639.00 – Hydraulic Fan Speed High…………….100
001639.16 – Hydraulic Fan Speed High…………….100
001639.18 – Hydraulic Fan Speed Low…………….101
001713.01 – Hydraulic Oil Filter Restricted…………….101
001713.03 – Hydraulic Oil Filter Restriction Switch Circuit Fault…………….101
001762.01 – Hydraulic Oil Pressure Low…………….101
001762.03 – Hydraulic Pressure Sensor Circuit Fault…………….101
001762.04 – Hydraulic Pressure Sensor Circuit Fault…………….101
001983.03 – Steering Valve Circuit Fault…………….101
001983.04 – Steering Valve Circuit Fault…………….101
001983.05 – Steering Valve Circuit Fault…………….101
001983.06 – Steering Valve Circuit Fault…………….101
001984.03 – Steering Valve Circuit Fault…………….101
001984.04 – Steering Valve Circuit Fault…………….101
001984.05 – Steering Valve Circuit Fault…………….101
001984.06 – Steering Valve Circuit Fault…………….101
002000.09 – Communication System Message Missing…………….101
002003.09 – Communication System Message Missing…………….101
002034.09 – Communication System Message Missing…………….101
002040.09 – Communication System Message Missing…………….101
002141.09 – Communication System Message Missing…………….101
002160.09 – Communication System Message Missing…………….101
002161.09 – Communication System Message Missing…………….101
002213.09 – Communication System Message Missing…………….101
002348.03 – Hi Beam Light Circuit Fault…………….101
002348.05 – Hi Beam Light Circuit Fault…………….101
002348.06 – Hi Beam Light Circuit Fault…………….101
002350.03 – Low Beam Light Circuit Fault…………….101
002350.05 – Low Beam Light Circuit Fault…………….101
002350.06 – Low Beam Light Circuit Fault…………….101
002352.06 – Cab Front Work Light Circuit Fault…………….101
002354.06 – Front Work Light Circuit Fault…………….101
002356.06 – Front Cab Corner Light Circuit Fault…………….101
002358.06 – Front Work Light Circuit Fault…………….101
002362.06 – Rear Cab Corner Light Circuit Fault…………….101
002366.06 – Right Side Work Light Circuit Fault…………….102
002367.04 – Left Turn Signal Lights Command Switch Circuit Fault…………….102
002368.03 – Marker/Tail Light Circuit Fault…………….102
002368.05 – Marker/Tail Light Circuit Fault…………….102
002368.06 – Left Turn Light Circuit Fault…………….102
002369.04 – Right Turn Signal Lights Command Switch Circuit Fault…………….102
002370.03 – Marker/Tail Light Circuit Fault…………….102
002370.05 – Marker/Tail Light Circuit Fault…………….102
002370.06 – Right Turn Light Circuit Fault…………….102
002378.03 – Marker/Tail Light Circuit Fault…………….102
002378.05 – Marker/Tail Light Circuit Fault…………….102
002378.06 – Marker/Tail Light Circuit Fault…………….102
002386.06 – Rotary Beacon Circuit Fault…………….102
002642.03 – Left Heated Mirror Circuit Fault…………….102
002642.05 – Left Heated Mirror Circuit Fault…………….102
002642.06 – Left Heated Mirror Circuit Fault…………….102
002874.04 – Hi Beam Switch Circuit Fault…………….102
003318.03 – Blade Pitch Sensor Circuit Fault…………….102
003318.04 – Blade Pitch Sensor Circuit Fault…………….102
003319.03 – Slope Sensor Circuit Fault…………….102
003319.04 – Slope Sensor Circuit Fault…………….102
003331.03 – Circle Rotate Sensor Circuit Fault…………….102
003331.04 – Circle Rotate Sensor Circuit Fault…………….102
003509.03 – Sensor Supply 1 Circuit Fault…………….102
003509.04 – Sensor Supply 1 Circuit Fault…………….102
003510.03 – Sensor Supply 2 Circuit Fault…………….102
003510.04 – Sensor Supply 2 Circuit Fault…………….102
003511.03 – Sensor Supply 3 Circuit Fault…………….102
003511.04 – Sensor Supply 3 Circuit Fault…………….102
004026.03 – Right Heated Mirror Circuit Fault…………….102
004026.05 – Right Heated Mirror Circuit Fault…………….102
004026.06 – Right Heated Mirror Circuit Fault…………….102
516688.06 – Left Rear Beacon Light Driver Circuit Fault…………….102
516689.06 – Right Rear Beacon Light Driver Circuit Fault…………….103
516690.03 – Engine Compartment Light 1 Circuit Fault…………….103
516690.06 – Engine Compartment Light 1 Circuit Fault…………….103
516691.03 – Engine Compartment Light 2 Circuit Fault…………….103
516691.06 – Engine Compartment Light 2 Circuit Fault…………….103
520450.03 – Saddle Lock Pin Switch Circuit Fault…………….103
520911.03 – Engine Compartment Light Switch Circuit Fault…………….103
520911.04 – Engine Compartment Light Switch Circuit Fault…………….103
521465.02 – Joystick Mismatch…………….103
521466.03 – Fan Direction/Relief Actuator Circuit Fault…………….103
521466.05 – Fan Direction/Relief Actuator Circuit Fault…………….103
521466.06 – Fan Direction/Relief Actuator Circuit Fault…………….103
521650.00 – Hydraulic Fan Drive Pump Pressure High…………….103
521650.03 – Hydraulic Fan Drive Pump Pressure Circuit Fault…………….103
521650.04 – Hydraulic Fan Pressure Sensor Circuit Fault…………….103
521900.03 – Articulation Angle Sensor Circuit Fault…………….103
521900.04 – Articulation Angle Sensor Circuit Fault…………….103
522176.01 – Secondary Steering Active…………….103
522340.03 – Saddle Lock Solenoid Circuit Fault…………….103
522340.04 – Saddle Lock Solenoid Circuit Fault…………….103
522340.05 – Saddle Lock Solenoid Circuit Fault…………….103
522340.06 – Saddle Lock Solenoid Circuit Fault…………….103
522343.03 – Rear Window Defrost Relay Circuit Fault…………….103
522343.05 – Rear Window Defrost Relay Circuit Fault…………….103
522343.06 – Rear Window Defrost Relay Circuit Fault…………….103
522375.01 – Transmission Oil Filter Restricted…………….103
522375.03 – Transmission Oil Filter Restriction Switch Circuit Fault…………….103
522415.06 – Front Lower Washer Pump Circuit Fault…………….103
522416.06 – Front Lower Wiper Hi Speed Circuit Fault…………….103
522418.06 – Front Lower Wiper Low Speed Circuit Fault…………….103
522433.06 – Rear Wiper Low Speed Circuit Fault…………….103
522434.06 – Front Wiper Low Speed Circuit Fault…………….103
522435.06 – Front Wiper Hi Speed Circuit Fault…………….103
522796.06 – Rear Washer Pump Circuit Fault…………….104
522797.06 – Front Washer Pump Circuit Fault…………….104
523688.03 – Steering Angle Sensor Circuit Fault…………….104
523688.04 – Steering Angle Sensor Circuit Fault…………….104
523689.04 – Diff Lock Switch Circuit Fault…………….104
523901.04 – Front Window Switch Circuit Fault…………….104
524044.01 – Axle Oil Filter Restricted…………….104
524044.03 – Axle Oil Filter Restriction Switch Circuit Fault…………….104
Group 50: Hydraulic Valve Controller (HVC) Diagnostic Trouble Codes…………….703
Hydraulic Valve Controller (HVC) Diagnostic Trouble Codes…………….703
000237.02 – Vehicle Identification Fault…………….104
000237.13 – Vehicle Identification Fault…………….104
000237.31 – Vehicle Identification Fault…………….104
000628.12 – Control Unit Programming…………….104
000629.12 – Control Unit Fault…………….104
000639.12 – Communication System Message Missing…………….104
000639.14 – Communication System Fault…………….104
001231.12 – Communication System Message Missing…………….104
001231.14 – Communication System Fault…………….104
001503.04 – Left Armrest Position Circuit Fault…………….104
001503.13 – Left Armrest Position Circuit Fault…………….104
001565.04 – Left Armrest Down Switch Circuit Fault…………….104
001566.04 – Right Armrest Down Switch Circuit Fault…………….104
001899.03 – Circle Side Shift Valve Circuit Fault…………….104
001899.04 – Circle Side Shift Valve Circuit Fault…………….104
001899.15 – Circle Side Shift Valve Warm Up Circuit…………….104
001899.17 – Circle Side Shift Valve Warm Up Circuit…………….104
001900.03 – Circle Side Shift Valve Circuit Fault…………….104
001900.04 – Circle Side Shift Valve Circuit Fault…………….104
001900.15 – Circle Side Shift Valve Warm Up Circuit…………….104
001900.17 – Circle Side Shift Valve Warm Up Circuit…………….104
001911.03 – Wheel Lean Valve Circuit Fault…………….104
001911.04 – Wheel Lean Valve Circuit Fault…………….104
001911.15 – Wheel Lean Valve Warm Up Circuit Fault…………….105
001911.17 – Wheel Lean Valve Warm Up Circuit Fault…………….105
001912.03 – Wheel Lean Valve Circuit Fault…………….105
001912.04 – Wheel Lean Valve Circuit Fault…………….105
001912.15 – Wheel Lean Valve Warm Up Circuit Fault…………….105
001912.17 – Wheel Lean Valve Warm Up Circuit Fault…………….105
001923.03 – Right Blade Lift Valve Circuit Fault…………….105
001923.04 – Right Blade Lift Valve Circuit Fault…………….105
001923.15 – Right Blade Lift Valve Warm Up Circuit Fault…………….105
001923.17 – Right Blade Lift Valve Warm Up Circuit Fault…………….105
001924.03 – Right Blade Lift Valve Circuit Fault…………….105
001924.04 – Right Blade Lift Valve Circuit Fault…………….105
001924.15 – Right Blade Lift Valve Warm Up Circuit Fault…………….105
001924.17 – Right Blade Lift Valve Warm Up Circuit Fault…………….105
001935.03 – Articulation Valve Circuit Fault…………….105
001935.04 – Articulation Valve Circuit Fault…………….105
001935.15 – Articulation Valve Warm Up Circuit Fault…………….105
001935.17 – Articulation Valve Warm Up Circuit Fault…………….105
001936.03 – Articulation Valve Circuit Fault…………….105
001936.04 – Articulation Valve Circuit Fault…………….105
001936.15 – Articulation Valve Warm Up Circuit Fault…………….105
001936.17 – Articulation Valve Warm Up Circuit Fault…………….105
001947.03 – Circle Rotate Valve Circuit Fault…………….105
001947.04 – Circle Rotate Valve Circuit Fault…………….105
001947.15 – Circle Rotate Valve Warm Up Circuit Fault…………….105
001947.17 – Circle Rotate Valve Warm Up Circuit Fault…………….105
001948.03 – Circle Rotate Valve Circuit Fault…………….105
001948.04 – Circle Rotate Valve Circuit Fault…………….105
001948.15 – Circle Rotate Valve Warm Up Circuit Fault…………….105
001948.17 – Circle Rotate Valve Warm Up Circuit Fault…………….105
001959.03 – Blade Side Shift Valve Circuit Fault…………….105
001959.04 – Blade Side Shift Valve Circuit Fault…………….105
001959.15 – Blade Side Shift Valve Warm Up Circuit…………….105
001959.17 – Blade Side Shift Valve Warm Up Circuit…………….106
001960.03 – Blade Side Shift Valve Circuit Fault…………….106
001960.04 – Blade Side Shift Valve Circuit Fault…………….106
001960.15 – Blade Side Shift Valve Warm Up Circuit Fault…………….106
001960.17 – Blade Side Shift Valve Warm Up Circuit Fault…………….106
001971.03 – Left Blade Lift Valve Circuit Fault…………….106
001971.04 – Left Blade Lift Valve Circuit Fault…………….106
001971.15 – Left Blade Lift Valve Warm Up Circuit Fault…………….106
001971.17 – Left Blade Lift Valve Warm Up Circuit Fault…………….106
001972.03 – Left Blade Lift Valve Circuit Fault…………….106
001972.04 – Left Blade Lift Valve Circuit Fault…………….106
001972.15 – Left Blade Lift Valve Warm Up Circuit Fault…………….106
001972.17 – Left Blade Lift Valve Warm Up Circuit Fault…………….106
002000.09 – Communication System Message Missing…………….106
002003.09 – Communication System Message Missing…………….106
002033.09 – Communication System Message Missing…………….106
002034.09 – Communication System Message Missing…………….106
002040.09 – Communication System Message Missing…………….106
002160.09 – Communication System Message Missing…………….106
002161.09 – Communication System Message Missing…………….106
005493.04 – Right Armrest Position Circuit Fault…………….106
005493.13 – Right Armrest Position Circuit Fault…………….106
520752.04 – Return to Straight Switch 1 Circuit Fault…………….106
520753.04 – Return to Straight Switch 2 Circuit Fault…………….106
520754.04 – Return to Straight Switch 3 Circuit Fault…………….106
520755.04 – Return to Straight Switch 4 Circuit Fault…………….106
523849.13 – Return to Straight Module Circuit Fault…………….106
Group 60: Auxiliary Valve Controller (AVC) Diagnostic Trouble Codes…………….855
Auxiliary Valve Controller (AVC) Diagnostic Trouble Codes…………….855
000237.02 – Vehicle Identification Fault…………….106
000237.13 – Vehicle Identification Fault…………….106
000237.31 – Vehicle Identification Fault…………….106
000628.12 – Control Unit Programing…………….106
000629.12 – Control Unit Fault…………….107
001995.03 – Blade Pitch Valve Circuit Fault…………….107
001995.04 – Blade Pitch Valve Circuit Fault…………….107
001995.15 – Blade Pitch Valve Warm Up Circuit Fault…………….107
001995.17 – Blade Pitch Valve Warm Up Circuit Fault…………….107
001996.03 – Blade Pitch Valve Circuit Fault…………….107
001996.04 – Blade Pitch Valve Circuit Fault…………….107
001996.15 – Blade Pitch Valve Warm Up Circuit Fault…………….107
001996.17 – Blade Pitch Valve Warm Up Circuit Fault…………….107
002000.09 – Communication System Message Missing…………….107
002003.09 – Communication System Message Missing…………….107
002033.09 – Communication System Message Missing…………….107
002040.09 – Communication System Message Missing…………….107
002160.09 – Communication System Message Missing…………….107
002165.09 – Communication System Message Missing…………….107
002213.09 – Communication System Message Missing…………….107
002263.03 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002263.04 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002263.15 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002263.17 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002264.03 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002264.04 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002264.15 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002264.17 – Under Cab Auxiliary Valve 1 Circuit Fault…………….107
002275.03 – Under Cab Auxiliary Valve 2 Circuit Fault…………….107
002275.04 – Under Cab Auxiliary Valve 2 Circuit Fault…………….107
002275.15 – Under Cab Auxiliary Valve 2 Warm Up Circuit Fault…………….107
002275.17 – Under Cab Auxiliary Valve 2 Warm Up Circuit Fault…………….107
002276.03 – Under Cab Auxiliary Valve 2 Circuit Fault…………….107
002276.04 – Under Cab Auxiliary Valve 2 Circuit Fault…………….107
002276.15 – Under Cab Auxiliary Valve 2 Warm Up Circuit Fault…………….107
002276.17 – Under Cab Auxiliary Valve 2 Warm Up Circuit Fault…………….107
002287.03 – Under Cab Auxiliary Valve 3 Circuit Fault…………….107
002287.04 – Under Cab Auxiliary Valve 3 Circuit Fault…………….108
002287.15 – Under Cab Auxiliary Valve 3 Warm Up Circuit Fault…………….108
002287.17 – Under Cab Auxiliary Valve 3 Warm Up Circuit Fault…………….108
002288.03 – Under Cab Auxiliary Valve 3 Circuit Fault…………….108
002288.04 – Under Cab Auxiliary Valve 3 Circuit Fault…………….108
002288.15 – Under Cab Auxiliary Valve 3 Warm Up Circuit Fault…………….108
002288.17 – Under Cab Auxiliary Valve 3 Warm Up Circuit Fault…………….108
002299.03 – Auxiliary Valve 1 Circuit Fault…………….108
002299.04 – Auxiliary Valve 1 Circuit Fault…………….108
002299.15 – Auxiliary Valve 1 Warm Up Circuit Fault…………….108
002299.17 – Auxiliary Valve 1 Warm Up Circuit Fault…………….108
002300.03 – Auxiliary Valve 1 Circuit Fault…………….108
002300.04 – Auxiliary Valve 1 Circuit Fault…………….108
002300.15 – Auxiliary Valve 1 Warm Up Circuit Fault…………….108
002300.17 – Auxiliary Valve 1 Warm Up Circuit Fault…………….108
002311.03 – Draft Frame Auxiliary Valve 2 Circuit Fault…………….108
Section 9005: Operational Checkout Procedure…………….1175
Group 10: Operational Checkout Procedure…………….1175
Operational Checkout…………….1213
Section 9010: Engine…………….1250
Group 05: Theory of Operation…………….1250
Engine Identification…………….1255
John Deere Engine Theory of Operation…………….1259
Cold Weather Start Aid…………….1260
Soft Start…………….1264
Engine Speed…………….1265
Group 10: System Diagrams…………….1250
Engine Cooling System Component Location…………….1269
Engine Fuel System Component Location…………….1272
Engine Intake and Exhaust Component Location…………….1274
Group 15: Diagnostic Information…………….1250
John Deere Engine Diagnostic Information…………….1278
Engine Sampling Port Location…………….1279
Group 25: Tests…………….1250
John Deere Engine…………….1281
Fluid Sampling Procedure…………….1282
Intake Manifold Pressure Test-Turbocharger Boost—9.0L Stage II…………….1287
Engine Slow and Fast Idle Speed Check…………….1289
Radiator Temperature Differential Test…………….1290
Turbocharger Wastegate Actuator Test—Engine 6090HDW04…………….1292
Section 9015: Electrical System…………….1294
Group 05: Theory of Operation…………….1294
Controller Area Network (CAN) Theory of Operation…………….1302
Start and Charge Circuits Theory of Operation…………….1305
Park Brake Circuit Theory of Operation…………….1311
Primary Display Unit (PDU) and Sealed Switch Module (SSM) Circuits Theory of Operation…………….1313
Engine Control Unit (ECU) Circuit Theory of Operation…………….1317
Transmission Control Unit (TCU) Circuit Theory of Operation…………….1322
Hydraulic Valve Controller (HVC) Circuit Theory of Operation…………….1330
Auxiliary Valve Controller (AVC) Circuit Theory of Operation…………….1338
Six-Wheel Drive (6WD) Circuit Theory of Operation…………….1343
Vehicle Control Unit (VCU) Circuit Theory of Operation…………….1348
Hydraulic Fan Speed and Fan Reversing Circuits Theory of Operation…………….1357
Differential Lock Circuit Theory of Operation…………….1362
Saddle Lock Circuit Theory of Operation…………….1365
Drive Lights, Marker Lights, Hazards, and Turn Lights Circuits Theory of Operation…………….1367
Work Lights Circuit Theory of Operation…………….1371
Brake Lights and Brake Accumulator Pressure Warning Circuit Theory of Operation…………….1374
Backup Lights Circuit Theory of Operation—If Equipped…………….1376
Beacon Light Circuit Theory of Operation—If Equipped…………….1378
Wipers and Washers Circuits Theory of Operation…………….1380
Rear Window Defog and Heated Side Mirrors Circuits Theory of Operation…………….1385
Air Conditioner, Heater, and Precleaner Circuits Theory of Operation…………….1388
JDLink™ Circuit Theory of Operation…………….1392
Group 10: System Diagrams…………….1294
Fuse and Relay Specifications…………….1397
Electrical Diagram Information…………….1400
Electrical Schematic Symbols…………….1404
System Functional Schematic, Wiring Diagram, and Component Location Master Legend…………….1406
System Functional Schematic…………….1416
Power and Ground Cables Wiring Diagram…………….1423
Power and Ground Cables Component Location…………….1425
Front 6WD Harness (W10) Component Location…………….1426
Front 6WD Harness (W10) Wiring Diagram…………….1428
Cab Roof Harness (W14) Component Location…………….1429
Cab Roof Harness (W14) Wiring Diagram…………….1431
Cab Interior Harness (W15) Component Location—6WD…………….1432
Cab Interior Harness (W15) Wiring Diagram—6WD…………….1436
Cab Interior Harness (W16) Component Location—Non 6WD…………….1440
Cab Interior Harness (W16) Wiring Diagram—Non 6WD…………….1444
Front Motor Speed Sensor Harnesses (W17 and W18) Component Location—6WD…………….1448
Front Motor Speed Sensor Harnesses (W17 and W18) Wiring Diagram—6WD…………….1449
Blade Impact Harness (W19) Component Location—If Equipped…………….1451
Blade Impact Harness (W19) Wiring Diagram—If Equipped…………….1452
Turn-Tail-Stop Light Harness (W20) Component Location…………….1453
Turn-Tail-Stop Light Harness (W20) Wiring Diagram…………….1454
Drive and Turn Lights Harnesses (W22 and W23) Component Location…………….1455
Drive and Turn Lights Harnesses (W22 and W23) Wiring Diagram…………….1456
Steering Angle Sensor Harness (W24) Component Location—6WD…………….1458
Steering Angle Sensor Harness (W24) Wiring Diagram—6WD…………….1459
Front Platform Harness (W25) Component Location…………….1460
Front Platform Harness (W25) Wiring Diagram…………….1462
Rear Platform Harness (W26) Component Location…………….1467
Rear Platform Harness (W26) Wiring Diagram…………….1468
Rear Camera Harness (W27) Component Location—If Equipped…………….1469
Rear Camera Harness (W27) Wiring Diagram—If Equipped…………….1470
Fan Door Harness (W31) Component Location…………….1471
Fan Door Harness (W31) Wiring Diagram…………….1472
Heater and Air Conditioner Harness (W32) Component Location…………….1473
Heater and Air Conditioner Harness (W32) Wiring Diagram…………….1474
Radio Harness (W33) Component Location…………….1475
Radio Harness (W33) Wiring Diagram…………….1477
Midstructure Harness (W34) Component Location…………….1478
Midstructure Harness (W34) Wiring Diagram…………….1479
Transmission Harness (W35) Component Location…………….1480
Transmission Harness (W35) Wiring Diagram…………….1482
Tilt Console Harness (W36) Component Location…………….1484
Tilt Console Harness (W36) Wiring Diagram…………….1486
Electrohydraulic (EH) Main Cab Harness (W38) Component Location…………….1489
Electrohydraulic (EH) Main Cab Harness (W38) Wiring Diagram…………….1491
Electrohydraulic (EH) Main Frame Harness (W39) Component Location…………….1493
Electrohydraulic (EH) Main Frame Harness (W39) Wiring Diagram…………….1495
Electrohydraulic (EH) Draft Frame Harness (W40) Component Location…………….1498
Electrohydraulic (EH) Draft Frame Harness (W40) Wiring Diagram…………….1499
Electrohydraulic (EH) Armrest Harnesses (W44 and W45) Component Location…………….1500
Electrohydraulic (EH) Armrest Harnesses (W44 and W45) Wiring Diagram…………….1501
Electrohydraulic (EH) Integrated Grade Control (IGC) Harnesses (W48 and W49) Component Location…………….1503
Electrohydraulic (EH) Integrated Grade Control (IGC) Harnesses (W48 and W49) Wiring Diagram…………….1504
Engine Interface Harness (W50) Component Location…………….1507
Engine Interface Harness (W50) Wiring Diagram…………….1508
Engine Harness (W55) Component Location—Engine 6090HDW01B…………….1509
Engine Harness (W55) Wiring Diagram—Engine 6090HDW01B…………….1510
Engine Harness (W56) Component Location—Engine 6090HDW04…………….1512
Engine Harness (W56) Wiring Diagram—Engine 6090HDW04…………….1513
Auxiliary Radio Input Harness (W59) Component Location—If Equipped…………….1514
Auxiliary Radio Input Harness (W59) Wiring Diagram—If Equipped…………….1515
License Plate Harness (W65) Component Location…………….1516
License Plate Harness (W65) Wiring Diagram…………….1517
Rear Camera Display Harness (W67) Component Location…………….1518
Rear Camera Display Harness (W67) Wiring Diagram…………….1519
Drive Light Extension Jumper Harnesses (W75 and W76) Component Location—If Equipped…………….1520
Drive Light Extension Jumper Harnesses (W75 and W76) Wiring Diagram—If Equipped…………….1522
Diesel Fired Coolant Heater (DFCH) Harness (W77) Component Location—If Equipped…………….1524
Diesel Fired Coolant Heater Harness (W77) Wiring Diagram—If Equipped…………….1525
Engine Work Light Harness (W79) Component Location…………….1526
Engine Work Light Harness (W79) Wiring Diagram…………….1527
Six-Wheel Drive (6WD) Pump Harness (W90) Component Location…………….1528
Six-Wheel Drive (6WD) Pump Harness (W90) Wiring Diagram…………….1529
JDLink™ Harnesses (W6002 and W6003) Component Location—If Equipped…………….1531
JDLink™ Modular Telematics Gateway (MTG) Harness (W6002) Wiring Diagram—If Equipped…………….1533
JDLink™ Satellite (SAT) Harness (W6003) Wiring Diagram—If Equipped…………….1534
Group 15: Diagnostic Information…………….1297
Vehicle Control Unit (VCU) Outputs…………….1539
Service ADVISOR™ Application…………….1543
Service ADVISOR™ Connection Procedure…………….1544
Service ADVISOR™ Remote (SAR) Connection Procedure…………….1546
Reading Diagnostic Trouble Codes (DTCs) With Service ADVISOR™ Application…………….1548
Intermittent Diagnostic Trouble Code (DTC) Diagnostics…………….1551
Cross Slope Diagnostics…………….1552
JDLink™ Connection Procedure—If Equipped…………….1561
Group 16: Monitor Operation…………….1297
Primary Display Unit (PDU)—Service Mode…………….1564
Service Menu—Display Settings—Menu Access…………….1566
Service Menu—Calibrations—Six-Wheel Drive (6WD)…………….1567
Service Menu—Calibrations—Transmission…………….1568
Service Menu—Calibrations—Articulation Angle…………….1569
Service Menu—Diagnostics—Codes—Clear Codes…………….1570
Service Menu—Diagnostics—OBD Tool…………….1571
Service Menu—Diagnostics—OBD Tool—Auxiliary Valve Controller (AVC)…………….1573
Service Menu—Diagnostics—OBD Tool—Hydraulic Valve Controller (HVC)…………….1579
Service Menu—Diagnostics—OBD Tool—Six-Wheel Drive (6WD) Controller (HWD)…………….1585
Main Menu—Diagnostics—OBD Tool—Modular Telematics Gateway (MTG)…………….1592
Main Menu—Diagnostics—OBD Tool—JDLink™ 2 (JL2) Control Unit…………….1604
Service Menu—Diagnostics—OBD Tool—Transmission Control Unit (TCU)…………….1616
Service Menu—Diagnostics—OBD Tool—Vehicle Control Unit (VCU)…………….1626
Service Menu—Machine Setup—Tire Size…………….1636
Main Menu—Machine Setting—Auto Low Idle…………….1637
Service Menu—Machine Setup—Auto Shutdown…………….1638
Group 17: Diagnostic Test Box…………….1297
Setup and Functional Test…………….1648
Two Wire Sensor Circuit Check—Out of Range High…………….1657
Two Wire Sensor Circuit Check—Out of Range Low…………….1659
Three Wire Sensor Circuit Check—Out of Range High…………….1661
Three Wire Sensor Circuit Check—Out of Range Low…………….1663
Group 20: Adjustments…………….1298
Transmission Control Unit (TCU) Calibration…………….1668
Six-Wheel Drive (6WD) Controller Calibration—If Equipped…………….1671
Six-Wheel Drive (6WD) Motor Incomplete Calibration Test…………….1674
CAN Circuit Testing…………….1678
Lower Windshield Wiper Proximity Switch Adjustment and Installation…………….1684
Articulation Sensor Linkage Adjustment (Rear Steer)…………….1686
Electrohydraulic Valve Calibration Procedure…………….1687
Articulation Sensor Calibration Procedure…………….1690
Steering Angle Sensor Calibration Procedure…………….1691
Group 25: Tests…………….1298
Electrical Component Specifications…………….1699
Component Exchange Diagnostic Test…………….1706
Alternator Test…………….1708
Output Shaft Speed Sensor Test…………….1712
Inching Pedal Module Test…………….1713
Accelerator Pedal Sensor Test…………….1717
Hydraulic Pump Pressure Sensor Test…………….1719
Hydraulic Fan Speed Sensor Test…………….1722
Switch Test…………….1725
Wiper Motor Test…………….1730
Electrical Component Checks…………….1732
Connector Terminal Test…………….1738
Section 9016: Six-Wheel Drive (6WD)…………….1741
Group 05: Theory of Operation…………….1741
Six-Wheel Drive (6WD) System Operation…………….1745
6WD Pump and Displacement Control Operation…………….1747
Six-Wheel Drive (6WD) Forward Operation…………….1748
Six-Wheel Drive (6WD) Pump Operation…………….1751
Six-Wheel Drive (6WD) Charge Circuit Operation…………….1753
Flushing Valve and Charge Pressure Regulating Valve Operation…………….1754
Six-Wheel Drive (6WD) Circuit Relief and Make-Up Valve Operation…………….1756
Six-Wheel Drive (6WD) Engagement Manifold Operation…………….1759
Six-Wheel Drive (6WD) Motor Operation…………….1761
6WD Wheel Operation…………….1763
6WD Precision Mode Operation…………….1765
6WD Inching Mode Operation…………….1767
Group 10: System Diagrams…………….1741
Six-Wheel Drive (6WD) System Schematic…………….1770
Six-Wheel Drive (6WD) System Component Location…………….1772
Group 15: Diagnostic Information…………….1741
No Front Wheel Motion (Both Wheels)…………….1741
No Front Wheel Motion During Inching Operation (Both Wheels)…………….1741
No Front Wheel Motion (One Wheel)…………….1741
Intermittent or Erratic Six-Wheel Drive (6WD) Operation…………….1741
Six-Wheel Drive (6WD) Charge Pressure Indicator Light On…………….1741
Hydraulic Oil Filter…………….1741
Hydraulic Oil Temperature Indicator Light On…………….1741
Six-Wheel Drive (6WD) System Oil Temperature Too Hot (6WD Oil Temperature Indicator On)…………….1741
Low Torque (One Wheel)…………….1741
Low Torque (Both Wheels)…………….1741
Wheel Overspeed (One Wheel)…………….1741
Operates in Low Speed Only (One Wheel)…………….1741
Operates in High Speed Only (One Wheel)…………….1741
Wheel(s) Will Not Stay in Neutral…………….1741
Operates in One Direction Only…………….1742
Wheels Rotate Opposite Each Other…………….1742
6WD Will Not Calibrate (No Diagnostic Trouble Codes)…………….1742
Group 20: Adjustments…………….1742
6WD Start-Up Procedure…………….1825
Six-Wheel Drive (6WD) Pump Control Neutral Adjustment…………….1827
Group 25: Tests…………….1742
Six-Wheel Drive (6WD) Oil Warm-Up Procedure…………….1832
Six-Wheel Drive (6WD) Planetary Brake Leakage Test…………….1833
Six-Wheel Drive (6WD) Neutral Charge Pressure Test…………….1836
Six-Wheel Drive (6WD) Charge Pressure Regulating Valve Test…………….1840
Six-Wheel Drive (6WD) Neutral Charge Pressure Balance Test…………….1845
Six-Wheel Drive (6WD) Motor Leakage Test…………….1848
Six-Wheel Drive (6WD) Circuit Relief and Make-Up Valve Test…………….1853
6WD Charge Pump Flow Test…………….1858
Six-Wheel Drive (6WD) Engagement Solenoid Valve Test…………….1859
Six-Wheel Drive (6WD) Hydraulic Oil Cooler Bypass Valve Pressure Test…………….2209
Section 9020: Power Train…………….1864
Group 05: Theory of Operation…………….1864
DF180 Powershift Transmission Operation…………….1868
Differential Lock Operation…………….1870
Internal Park Brake Operation…………….1874
Rear Axle and Tandem Operation…………….1876
Group 10: System Diagrams…………….1864
Power Train Schematic…………….1879
Power Train Component Location…………….1881
Group 15: Diagnostic Information…………….1864
Transmission Overfills With Oil…………….1864
Transmission Slippage…………….1864
Machine “Jumps” When Inching Pedal Engaged…………….1864
Machine Lacks Power Or Moves Slow…………….1864
Transmission Shifts Too Slow (Machine Stops When Changing Gears Under Load)…………….1864
Transmission Shifts Too Quickly…………….1864
Machine Will Not Move In Any Gear and Park Brake Indicator Light Is On (No Load Put On Engine When Shifted Into Gear)…………….1864
Machine Will Not Move (Load Put On Engine Or Engine Stalls When Shifted Into Gear)…………….1864
Low Pressure In Different Gears Using Same Proportional Solenoid Valve…………….1864
Machine Creeps In Neutral (Load Put On Engine When Service Brakes Are Applied)…………….1864
Machine Creeps In Gear With Inching Pedal Fully Depressed…………….1864
Transmission System Overheats…………….1864
Transmission Control Lever Does Not Move Freely…………….1864
Excessive Transmission Noise (Under Load or No Load)…………….1864
Transmission Engages In a Gear, but Not Gear Selected…………….1864
Transmission Fails To Change Gear From First Gear Selected…………….1864
Transmission Faults To Neutral…………….1864
Excessive Machine Vibration…………….1864
Erratic Transmission Oil Pressure…………….1864
Excessive Oil Pressure…………….1864
Low Oil Pressure In All Gears…………….1864
Low Pressure In One Gear But Correct In Other Gears…………….1864
Transmission Breather Oil Leakage…………….1865
Filter Or Filter Oil Lines Blow Out…………….1865
Low Lube Pressure In Some Gears But Correct In Other Gears…………….1865
Excessive Lube Pressure In Some Gears But Correct In Other Gears…………….1865
Low Transmission Cooler Inlet Pressure And Lube Pressure…………….1865
Park Brake Engages While Vehicle Is Moving…………….1865
Park Brake Will Not Release…………….1865
Park Brake Will Not Hold…………….1865
Park Brake Overheats…………….1865
Park Brake Noisy…………….1865
No Differential Lock Operation…………….1870
Differential Lock Slippage…………….1865
Excessive Differential and/or Axle Noise…………….1865
Group 25: Tests…………….1865
Differential Oil Warm-Up Procedure…………….1938
Differential Lock Valve Pressure Test…………….1940
Differential Lock Charge Pump Flow Test…………….1942
Differential Oil Cooler Differential Pressure Test…………….1944
Differential Oil Cooler Bypass Valve Pressure Test…………….1948
Transmission Oil Cooler Differential Pressure Test…………….1951
Park Brake Release Pressure Test…………….1955
Section 9025: Hydraulic System…………….1956
Group 05: Theory of Operation…………….1956
Hydraulic System Operation…………….1961
Hydraulic Pump Operation…………….1963
Hydraulic Fan Pump Operation…………….1966
Hydraulic System Manifold Operation…………….1967
Control Valve Operation—Standard Controls…………….1969
Control Valve Operation—EH Controls…………….1973
Hydraulic Oil Filter Operation…………….1977
System Relief Valve Operation…………….1979
Circuit Relief Valve Operation…………….1980
Service Brake Valve Operation…………….1981
Service Brake Accumulator Operation…………….1983
Hydraulic Fan Drive Operation…………….1985
Steering System Operation…………….1987
Steering System Operation—EH Controls…………….1989
Load Sense Operation With All Functions in Neutral…………….1991
Load Sense Operation With One Function Activated…………….1993
Load Sense Operation With Multiple Functions Activated…………….1995
Wheel Lean, Articulation, Circle Side Shift, Blade Pitch, and Blade Side Shift Valve Operation…………….1998
Circle Rotate Valve Operation…………….2000
Saddle Locking Pin Valve Operation…………….2002
Blade Lift and Auxiliary Valve Operation…………….2004
Blade Impact Absorption System Operation…………….2007
Circle Drive Gearbox Operation-Without Slip Clutch…………….2010
Circle Drive Gearbox Operation-With Slip Clutch…………….2012
Dual Input Circle Drive Gearbox Operation—If Equipped…………….2015
Dual Input Circle Drive Gearbox (With Slip Clutch) Operation—If Equipped…………….2017
Hydraulic Oil Cooler Bypass Manifold Operation…………….2019
Group 10: System Diagrams…………….1956
Hydraulic System Schematic Master Legend…………….2024
Hydraulic System Schematic…………….2028
Hydraulic System Schematic Master Legend—EH Controls…………….2032
Hydraulic System Schematic—EH Controls…………….2037
Hydraulic System Component Location…………….2042
Hydraulic System Component Location—EH Controls…………….2047
Group 15: Diagnostic Information…………….1957
No Hydraulics…………….1957
Hydraulic System Overheats…………….1957
Slow Hydraulic Functions…………….1957
Hydraulic Function (or Pump) Makes “Chattering” Noise…………….1957
Pump Appears To Be Stuck At Minimum Displacement…………….1957
Pump Appears To Be Stuck At Maximum Displacement…………….1957
Function Moves Too Fast…………….1957
Function Drifts Down…………….1957
Excessive Effort to Move Function Control Lever…………….1957
Individual Function Is Slow (Cycle Time Checked Slow)…………….1957
Slow or Hard Steering…………….1957
No Steering…………….1957
Erratic Steering…………….1957
Excessive Steering Wheel Turns to Steer Machine…………….1957
Wheels Move After Steering Wheel Stopped…………….1957
Excessive Vibration of Steering Wheel…………….1957
Steering Wheel Kickback…………….1957
Poor or No Brakes (Steering and Hydraulic System Operation Normal)…………….1957
Aggressive Brakes or Brakes Lock Up…………….1957
Brakes Drag…………….1957
Brakes Chatter or Noisy…………….1957
Delay in Braking…………….1957
Hydraulic Fan Does Not Reach Full Speed…………….1957
Hydraulic Fan Runs At Full Speed Only…………….1957
Hydraulic Fan Does Not Spin…………….1957
Hydraulic Fan Will Not Reverse Direction…………….1957
Group 25: Tests…………….1957
JT02156A Digital Pressure and Temperature Analyzer Kit Installation…………….2119
Hydraulic Oil Warm-Up Procedure…………….2120
Vacuum Pump Installation…………….2121
Hydraulic Pump Standby Pressure Hydraulic Pump Standby Pressure & Load Sense Standby Pressure Test{pgNO}1958 Load Sense Standby Pressure Test…………….2122
Load Sense Relief Valve Load Sense Relief Valve & Pump Relief Test{pgNO}1958 Pump Relief Test…………….2128
System Relief Valve Pressure Test…………….2133
Load Sense Shuttle Valve Isolation Test—Standard Controls…………….2137
Load Sense Shuttle Valve Isolation Test—EH Controls…………….2143
Hydraulic Pump Leakage Test…………….2149
Hydraulic Pump Flow Test…………….2151
Service Brake Valve Pressure Test…………….2154
Service Brake Accumulator Precharge Test…………….2157
Service Brake Pressure Switch Test…………….2160
Service Brake Valve Leakage Test…………….2163
Hydraulic Cylinder Drift Test…………….2165
Hydraulic Cylinder Leakage Test…………….2167
Rotary Manifold Leakage Test…………….2170
Steering System Leakage Test…………….2174
Service Brake Accumulator Inlet Check Valve Leakage Test…………….2180
Blade Impact Absorption Accumulator Charge Pressure Test…………….2183
Blade Impact Absorption Accumulator Hydraulic Discharge Procedure…………….2186
Secondary Steering Accumulator Charge Pressure Test…………….2188
Blade Lift Relief Valve Test…………….2191
Circuit Relief Valve Test—Midmount Scarifier…………….2194
Saddle Locking Cylinder Pressure Reducing Valve Test…………….2196
Hydraulic Fan Pump Pressure Test…………….2199
Hydraulic Fan Pump Flow Test…………….2201
Hydraulic Fan Motor Speed Test…………….2204
Hydraulic Fan Motor Case Drain Test…………….2206
Hydraulic Oil Cooler Bypass Valve Pressure Test…………….2209
Section 9031: Heating and Air Conditioning…………….2211
Group 05: Theory of Operation…………….2211
Air Conditioning System Cycle of Operation…………….2214
Group 10: System Diagrams…………….2211
Air Conditioner and Heater Component Location…………….2218
Group 15: Diagnostic Information…………….2211
Diagnose Air Conditioning System Malfunctions…………….2221
Air Conditioning System Does Not Operate…………….2211
Air Conditioner Does Not Cool Interior of Cab…………….2211
Air Conditioner Runs Constantly, Too Cold…………….2211
Diagnose Heater System Malfunctions…………….2232
Heater System Does Not Operate…………….2211
Heater Does Not Warm Interior of Cab…………….2211
Interior Windows Continue to Fog…………….2211
Group 25: Tests…………….2211
R134a Refrigerant Cautions and Proper Handling…………….2244
Heater and Air Conditioner Operational Checks…………….2245
Operating Pressure Diagnostic Chart…………….2248
Air Conditioner Compressor Clutch Test…………….2250
Air Conditioner High/Low-Pressure Switch Test…………….2251
R134a Refrigerant Leak Test…………….2254
R134a Oil Charge Capacity…………….2255
R134a Refrigerant Charge Capacity…………….2256
Air Conditioner Freeze Control Switch Test…………….2257
Heater Blower Switch Test…………….2259
Heater Blower Resistor Test…………….2260
Heater Blower Motor Test…………….2262
R134a Air Conditioning System Test…………….2263
John Deere 770G, 770GP, 772G, and 772GP Motor Graders Diagnosis and Tests Service Technical Manual (TM14076X19)