John Deere 770G, 770GP, 772G, and 772GP Motor Graders Diagnosis and Tests Service Technical Manual (TM14250X19)
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.
TM14250X19 - John Deere 770G, 770GP, 772G, and 772GP Motor Graders Technical Manual.pdf
tm14250x63 - John Deere 770G, 770GP, 772G y 772GP Motoniveladoras.pdf
tm14250x28 - John Deere Niveleuses 770G, 770GP, 772G et 772GP.pdf
tm14250x54 - John Deere Motoniveladoras 770G, 770GP, 772G e 772GP.pdf
tm14250x59 - John Deere автогрейдеров моделей 770G, 770GP, 772G и 772GP.pdf
PRODUCT DETAILS:
Total Pages: 2,333 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English
Models:
John Deere - Motor Grader - 1DW770G_ _ _C680878-
John Deere - Motor Grader - 1DW770G_ _ _D680878-
Category: Operation and Test
Language: Spanish English French Portuguese Russian
TABLE OF CONTENTS
Section 9000: General Information....41
Group 01: Safety....41
Information for European Union Directives and Eurasian Economic Union Technical Regulations Compliance....48
Recognize Safety Information....53
Follow Safety Instructions....54
Operate Only If Qualified....55
Wear Protective Equipment....56
Protect Against Noise....57
Avoid Unauthorized Machine Modifications....58
Inspect Machine....59
Stay Clear of Moving Parts....60
Avoid High-Pressure Fluids....61
Avoid High-Pressure Oils....62
Work In Ventilated Area....63
Avoid Static Electricity Risk When Refueling....64
High Debris Applications....66
Prevent Fires....67
In Case of Machine Fire....68
Prevent Battery Explosions....69
Handle Chemical Products Safely....70
Handle Starting Fluid Safely....71
Decommissioning — Proper Recycling and Disposal of Fluids and Components....72
Prepare for Emergencies....73
Clean Debris from Machine....74
Use Steps and Handholds Correctly....75
Start Only From Operator's Seat....76
Use and Maintain Seat Belt....77
Prevent Unintended Machine Movement....78
Avoid Work Site Hazards....80
Keep Riders Off Machine....82
Avoid Backover Accidents....83
Avoid Machine Tip Over and Machine Damage....84
Operating or Traveling On Public Roads....85
Inspect and Maintain ROPS....86
Operating in Water and Mud....87
Travel Safely....88
Prevent Acid Burns....89
Add and Operate Attachments Safely....91
Park And Prepare For Service Safely....92
Service Machines Safely....93
Service Cooling System Safely....94
Service Accumulator Systems Safely....95
Remove Paint Before Welding or Heating....96
Make Welding Repairs Safely....97
Drive Metal Pins Safely....98
Service Tires Safely....99
Use Proper Lifting Equipment....100
Section 9001: Diagnostics....101
Group 10: Transmission Control Unit (TCU) Diagnostic Trouble Codes....123
Transmission Control Unit (TCU) Diagnostic Trouble Codes....123
000070.03 - Park Brake Pressure Switch Circuit Fault....101
000070.04 - Park Brake Pressure Switch Circuit Fault....101
000177.00 - Transmission Oil Temperature High....101
000177.03 - Transmission Oil Temperature Sensor Circuit Fault....101
000177.04 - Transmission Oil Temperature Sensor Circuit Fault....101
000177.16 - Transmission Oil Temperature High....101
000237.02 - Invalid VIN....101
000237.13 - VIN Options Not Learned....101
000237.14 - VIN Options Not Learned....101
000237.31 - VIN Message Missing....101
000444.03 - Unswitched Battery Voltage....101
000444.04 - Unswitched Battery Voltage....101
000525.02 - Undefined Gear....101
000525.07 - Undefined Gear....101
000525.12 - Undefined Gear....101
000578.00 - Rear Axle Oil Temperature High....101
000578.03 - Rear Axle Oil Temp Sensor Short to Power....101
000578.04 - Rear Axle Oil Temp Sensor Short to Ground....101
000619.05 - Transmission Park Circuit Fault....101
000619.06 - Transmission Park Circuit Fault....101
000619.07 - Park Fault....101
000619.31 - Park Fault....101
000628.12 - Control Unit Programming....101
001231.12 - Communication System Message Missing....101
001231.14 - Communication System Message Fault....101
002000.02 - Communication System Fault....101
002000.09 - Communication System Message Missing....101
002003.09 - Communication System Message Missing....101
002033.02 - Communication System Fault....101
002033.09 - Communication System Message Missing....101
002034.09 - Communication System Message Missing....102
002141.09 - Communication System Message Missing....102
002161.02 - Communication System Message Missing....102
002161.09 - Communication System Message Missing....102
002213.02 - Communication System Message Missing....102
002213.09 - Communication System Message Missing....102
002225.02 - Communication System Message Missing....102
002225.09 - Communication System Message Missing....102
002833.07 - Movement While Park Brake Applied....102
002833.31 - Park Fault....102
003510.03 - TCU Sensor Supply #2....102
003510.04 - TCU Sensor Supply #2....102
003511.03 - TCU Sensor Supply #3....102
003511.04 - TCU Sensor Supply #3....102
516321.03 - Switched Battery Voltage....102
516321.04 - Switched Battery Voltage....102
516755.05 - Transmission Rev Circuit Fault....102
516755.06 - Transmission Rev Circuit Fault....102
516770.05 - Transmission Left Rev Lamp Circuit Fault....102
516770.06 - Transmission Left Rev Lamp Circuit Fault....102
516773.05 - Transmission Right Rev Lamp Circuit Fault....102
516773.06 - Transmission Right Rev Lamp Circuit Fault....102
517056.12 - End of Line File - EOL....102
517056.31 - End of Line File - EOL....102
521601.12 - End of Line File - EOL....102
521601.31 - End of Line File - EOL....102
522087.07 - Park Fault....102
522087.12 - Park Fault....102
522087.31 - Park Fault....102
522252.00 - Clutch 1 Hold Pressure Too High....102
522252.01 - Clutch 1 Hold Pressure Too Low....102
522253.00 - Clutch 2 Hold Pressure Too High....102
522253.01 - Clutch 2 Hold Pressure Too Low....102
522254.00 - Clutch 3 Hold Pressure Too High....103
522254.01 - Clutch 3 Hold Pressure Too Low....103
522255.00 - Clutch 4 Hold Pressure Too High....103
522255.01 - Clutch 4 Hold Pressure Too Low....103
522256.00 - Clutch A Hold Pressure Too High....103
522256.01 - Clutch A Hold Pressure Too Low....103
522257.00 - Clutch B Hold Pressure Too High....103
522257.01 - Clutch B Hold Pressure Too Low....103
522258.00 - Clutch C Hold Pressure Too High....103
522258.01 - Clutch C Hold Pressure Too Low....103
522259.00 - Clutch D Hold Pressure Too High....103
522259.01 - Clutch D Hold Pressure Too Low....103
522414.00 - Transmission Clutch Temperature Fault....103
522414.03 - Transmission Clutch D Solenoid Circuit Fault....103
522414.05 - Transmission Clutch D Solenoid Circuit Fault....103
522414.06 - Transmission Clutch D Solenoid Circuit Fault....103
522507.14 - Transmission Calibration Fault....103
522517.31 - Engine Stall Prevention Active....103
523438.31 - End of Line File - EOL....103
523655.03 - Forward and Reverse Both Active....103
523697.03 - Inching Pedal Circuit Fault....103
523697.04 - Inching Pedal Circuit Fault....103
523697.31 - Inching Pedal System Fault....103
523699.31 - Transmission Speed Clutch Slipping....103
523700.31 - Transmission Clutch Slipping....103
523708.03 - Inching Pedal Circuit Fault....103
523708.04 - Inching Pedal Circuit Fault....103
523708.31 - Inching Pedal Circuit Fault....103
523712.31 - Transmission Calibration Fault....103
523717.31 - Transmission Calibration Fault....103
523718.31 - Transmission Calibration Fault....103
523720.00 - Clutch Fill Time Too Long....103
523720.01 - Clutch Fill Time Too Short....103
523721.00 - Clutch Fill Time Too Long....104
523721.01 - Clutch Fill Time Too Short....104
523722.00 - Clutch Fill Time Too Long....104
523722.01 - Clutch Fill Time Too Short....104
523723.00 - Clutch Fill Time Too Long....104
523723.01 - Clutch Fill Time Too Short....104
523724.00 - Clutch Fill Time Too Long....104
523724.01 - Clutch Fill Time Too Short....104
523725.00 - Clutch Fill Time Too Long....104
523725.01 - Clutch Fill Time Too Short....104
523726.00 - Clutch Fill Time Too Long....104
523726.01 - Clutch Fill Time Too Short....104
523727.00 - Clutch Fill Time Too Long....104
523727.01 - Clutch Fill Time Too Short....104
523728.31 - Transmission Calibration Fault....104
523729.31 - Transmission Calibration Fault....104
523730.31 - Transmission Calibration Fault....104
523731.31 - Transmission Calibration Fault....104
523732.31 - Transmission Calibration Fault....104
523733.31 - Transmission Calibration Fault....104
523734.31 - Transmission Calibration Fault....104
523761.00 - Transmission Clutch Temperature Fault....104
523761.03 - Transmission Clutch Circuit Fault....104
523761.05 - Transmission Clutch Circuit Fault....104
523761.06 - Transmission Clutch Circuit Fault....104
523762.00 - Transmission Clutch Temperature Fault....104
523762.03 - Transmission Clutch Circuit Fault....104
523762.05 - Transmission Clutch Circuit Fault....104
523762.06 - Transmission Clutch Circuit Fault....104
523763.00 - Transmission Clutch Temperature Fault....104
523763.03 - Transmission Clutch Circuit Fault....104
523763.05 - Transmission Clutch Circuit Fault....104
523763.06 - Transmission Clutch Circuit Fault....104
523764.00 - Transmission Clutch Temperature Fault....105
523764.03 - Transmission Clutch Circuit Fault....105
523764.05 - Transmission Clutch Circuit Fault....105
523764.06 - Transmission Clutch Circuit Fault....105
524173.00 - Inching Pedal Circuit Fault....105
524173.01 - Inching Pedal Circuit Fault....105
524173.03 - Inching Pedal Circuit Fault....105
524173.04 - Inching Pedal Circuit Fault....105
524173.12 - Inching Pedal System Fault....105
524173.31 - Inching Pedal Circuit Fault....105
524271.00 - Transmission Clutch Temperature Fault....105
524271.03 - Transmission Clutch Circuit Fault....105
524271.05 - Transmission Clutch Circuit Fault....105
524271.06 - Transmission Clutch Circuit Fault....105
524272.00 - Transmission Clutch Temperature Fault....105
524272.03 - Transmission Clutch Circuit Fault....105
524272.05 - Transmission Clutch Circuit Fault....105
524272.06 - Transmission Clutch Circuit Fault....105
524273.00 - Transmission Clutch Temperature Fault....105
524273.03 - Transmission Clutch Circuit Fault....105
524273.05 - Transmission Clutch Circuit Fault....105
524273.06 - Transmission Clutch Circuit Fault....105
Group 20: Engine Control Unit (ECU) Diagnostic Trouble Codes....384
Engine Control Unit (ECU) Diagnostic Trouble Codes....384
000029.03 - Decel Pedal Short to Power....105
000091.03 - Accel Pedal Short to Power....105
000091.04 - Accel Pedal Open or Short....105
000094.18 - Fuel Pressure Very Low....105
000107.00 - Engine Air Filter Restricted....105
000237.02 - Vehicle Identification Conflict....105
000237.13 - Vehicle Identification Fault....105
000237.31 - Communication Fault....105
000596.31 - Engine Speed Control Enable Switch Fault....105
000600.31 - Engine Speed Accel/Decel Switch Fault....106
001172.03 - Turbocharger Inlet Temperature Circuit Fault....106
001172.04 - Turbocharger Inlet Temperature Circuit Fault....106
001196.31 - ECU Anti Theft Locked....106
001321.05 - Starter Relay Open Circuit....106
001321.06 - Starter Relay High Current....106
001321.31 - Starter Sol Open Circuit....106
002003.09 - CAN Comm Lost for TCU....106
002033.09 - CAN Comm Lost for VCU....106
002630.00 - Charge Air Cooler Temperature Extremely High....106
002630.03 - Charge Air Cooler Temperature Sensor Circuit Fault....106
002630.04 - Charge Air Cooler Temperature Sensor Circuit Fault....106
002630.15 - Charge Air Cooler Temperature High....106
002630.16 - Charge Air Cooler Temperature Very High....106
Group 30: Primay Display Unit (PDU) Diagnostic Trouble Codes....106
Primary Display Unit (PDU) Diagnostic Trouble Codes....419
000237.02 - Vehicle Identification Number....106
000237.13 - Vehicle Identification Number....106
000237.31 - Vehicle Identification Number....106
000629.12 - Control Unit Fault....106
000920.03 - Audible Alarm Circuit Fault....106
000920.04 - Audible Alarm Circuit Fault....106
002000.09 - Communication System Fault....106
002084.09 - Communication System Message Missing....106
516628.10 - Display Button - UP....106
516629.10 - Display Button - DOWN....106
516630.10 - Display Button - SELECT....106
517057.12 - EE Vehicle Hours Checksum Failure....106
517170.10 - Display Button - LEFT....106
517171.10 - Display Button - RIGHT....106
520760.02 - Camera Signal....106
521859.10 - Display Button - MENU....106
524050.12 - Real Time Clock....106
Group 40: Vehicle Control Unit (VCU) Diagnostic Trouble Codes....440
Vehicle Control Unit (VCU) Diagnostic Trouble Codes....440
000096.03 - Fuel Level Sensor Circuit Fault....107
000096.04 - Fuel Level Sensor Circuit Fault....107
000117.01 - Service Brake Pressure Low....107
000117.03 - Service Brake Accumulator Switch Circuit Fault....107
000117.04 - Service Brake Accumulator Switch Circuit Fault....107
000167.03 - Switched Power Circuit Fault....107
000167.04 - Switched Power Circuit Fault....107
000168.03 - Unswitched Power Circuit Fault....107
000168.04 - Unswitched Power Circuit Fault....107
000237.02 - Vehicle Identification Fault....107
000237.13 - Vehicle Identification Fault....107
000237.31 - Vehicle Identification Fault....107
000583.03 - Mainfall Sensor Circuit Fault (S.N. —693168)....107
000583.04 - Mainfall Sensor Circuit Fault (S.N. —693168)....107
000628.12 - Control Unit Programming....107
000629.12 - Control Unit Fault....107
000639.12 - Communication System Message Missing....107
000639.14 - Communication System Fault....107
000746.03 - Differential Lock Solenoid Circuit Fault....107
000746.05 - Differential Lock Solenoid Circuit Fault....107
000746.06 - Differential Lock Solenoid Circuit Fault....107
000876.03 - A/C Compressor Clutch Circuit Fault....107
000876.05 - A/C Compressor Clutch Circuit Fault....107
000876.06 - A/C Compressor Clutch Circuit Fault....107
000880.03 - Stop Lamp Circuit (Red) Fault....107
000880.05 - Stop Lamp Circuit (Red) Fault....107
000880.06 - Stop Lamp Circuit (Red) Fault....107
000977.03 - Reversing Fan Solenoid Circuit Fault....107
000977.05 - Reversing Fan Solenoid Circuit Fault....107
000977.06 - Reversing Fan Solenoid Circuit Fault....107
000977.07 - Reversing Fan Pressure High....107
001045.04 - Brake Light Switch Circuit Fault....108
001071.03 - Fan Speed Solenoid Circuit Fault....108
001071.04 - Fan Speed Solenoid Circuit Fault....108
001071.05 - Fan Speed Solenoid Circuit Fault....108
001071.06 - Fan Speed Solenoid Circuit Fault....108
001231.12 - Communication System Message Missing....108
001231.14 - Communication System Fault....108
001569.31 - Engine Derated....108
001638.00 - Hydraulic Oil Temperature High....108
001638.03 - Hydraulic Oil Temperature Sensor Circuit Fault....108
001638.04 - Hydraulic Oil Temperature Sensor Circuit Fault....108
001713.01 - Hydraulic Oil Filter Restricted....108
001713.03 - Hydraulic Oil Filter Restriction Switch Circuit Fault....108
001762.01 - Hydraulic Oil Pressure Low....108
001762.03 - Hydraulic Pressure Sensor Circuit Fault....108
001762.04 - Hydraulic Pressure Sensor Circuit Fault....108
001983.03 - Steering Valve Circuit Fault....108
001983.04 - Steering Valve Circuit Fault....108
001983.05 - Steering Valve Circuit Fault....108
001983.06 - Steering Valve Circuit Fault....108
001984.03 - Steering Valve Circuit Fault....108
001984.04 - Steering Valve Circuit Fault....108
001984.05 - Steering Valve Circuit Fault....108
001984.06 - Steering Valve Circuit Fault....108
002000.09 - Communication System Message Missing....108
002003.09 - Communication System Message Missing....108
002034.09 - Communication System Message Missing....108
002040.09 - Communication System Message Missing....108
002141.09 - Communication System Message Missing....108
002160.09 - Communication System Message Missing....108
002161.09 - Communication System Message Missing....108
002162.09 - Communication System Message Missing....108
002163.09 - Communication System Message Missing....108
002213.09 - Communication System Message Missing....109
002348.03 - Hi Beam Light Circuit Fault....109
002348.05 - Hi Beam Light Circuit Fault....109
002348.06 - Hi Beam Light Circuit Fault....109
002350.03 - Low Beam Light Circuit Fault....109
002350.05 - Low Beam Light Circuit Fault....109
002350.06 - Low Beam Light Circuit Fault....109
002352.06 - Cab Front Work Light Circuit Fault....109
002354.06 - Front Work Light Circuit Fault....109
002356.06 - Front Cab Corner Light Circuit Fault....109
002358.06 - Front Work Light Circuit Fault....109
002362.06 - Rear Cab Corner Light Circuit Fault....109
002366.06 - Right Side Work Light Circuit Fault....109
002367.04 - Left Turn Signal Lights Command Switch Circuit Fault....109
002368.03 - Marker/Tail Light Circuit Fault....109
002368.05 - Marker/Tail Light Circuit Fault....109
002368.06 - Left Turn Light Circuit Fault....109
002369.04 - Right Turn Signal Lights Command Switch Circuit Fault....109
002370.03 - Marker/Tail Light Circuit Fault....109
002370.05 - Marker/Tail Light Circuit Fault....109
002370.06 - Right Turn Light Circuit Fault....109
002378.03 - Marker/Tail Light Circuit Fault....109
002378.05 - Marker/Tail Light Circuit Fault....109
002378.06 - Marker/Tail Light Circuit Fault....109
002642.03 - Left Heated Mirror Circuit Fault....109
002642.05 - Left Heated Mirror Circuit Fault....109
002642.06 - Left Heated Mirror Circuit Fault....109
002682.12 - Left Joystick FNR Invalid Position....109
002689.31 - Left Joystick Button 5 Stuck....109
002690.31 - Left Joystick Button 6 Stuck....109
002874.04 - Hi Beam Switch Circuit Fault....109
003318.03 - Blade Pitch Sensor Circuit Fault (S.N. —693168)....109
003318.04 - Blade Pitch Sensor Circuit Fault (S.N. —693168)....109
003319.03 - Slope Sensor Circuit Fault (S.N. —693168)....110
003319.04 - Slope Sensor Circuit Fault (S.N. —693168)....110
003331.03 - Circle Rotate Sensor Circuit Fault....110
003331.04 - Circle Rotate Sensor Circuit Fault....110
003509.03 - Sensor Supply 1 Circuit Fault....110
003509.04 - Sensor Supply 1 Circuit Fault....110
003510.03 - Sensor Supply 2 Circuit Fault....110
003510.04 - Sensor Supply 2 Circuit Fault....110
003511.03 - Sensor Supply 3 Circuit Fault....110
004026.03 - Right Heated Mirror Circuit Fault....110
004026.05 - Right Heated Mirror Circuit Fault....110
004026.06 - Right Heated Mirror Circuit Fault....110
516688.06 - Left Rear Beacon Light Driver Circuit Fault....110
516689.06 - Right Rear Beacon Light Driver Circuit Fault....110
516690.03 - Engine Compartment Light 1 Circuit Fault....110
516690.06 - Engine Compartment Light 1 Circuit Fault....110
516691.03 - Engine Compartment Light 2 Circuit Fault....110
516691.06 - Engine Compartment Light 2 Circuit Fault....110
520450.03 - Saddle Lock Pin Switch Circuit Fault....110
520911.03 - Engine Compartment Light Switch Circuit Fault....110
520911.04 - Engine Compartment Light Switch Circuit Fault....110
521465.02 - Joystick Mismatch....110
521466.03 - Fan Direction/Relief Actuator Circuit Fault....110
521466.05 - Fan Direction/Relief Actuator Circuit Fault....110
521466.06 - Fan Direction/Relief Actuator Circuit Fault....110
521650.00 - Hydraulic Fan Drive Pump Pressure High....110
521650.03 - Hydraulic Fan Drive Pump Pressure Circuit Fault....110
521650.04 - Hydraulic Fan Pressure Sensor Circuit Fault....110
521900.03 - Articulation Angle Sensor Circuit Fault....110
521900.04 - Articulation Angle Sensor Circuit Fault....110
522176.01 - Secondary Steering Active....110
522340.03 - Saddle Lock Solenoid Circuit Fault....110
522340.04 - Saddle Lock Solenoid Circuit Fault....110
522340.05 - Saddle Lock Solenoid Circuit Fault....111
522340.06 - Saddle Lock Solenoid Circuit Fault....111
522343.03 - Rear Window Defrost Relay Circuit Fault....111
522343.05 - Rear Window Defrost Relay Circuit Fault....111
522343.06 - Rear Window Defrost Relay Circuit Fault....111
522375.01 - Transmission Oil Filter Restricted....111
522375.03 - Transmission Oil Filter Restriction Switch Circuit Fault....111
522415.06 - Front Lower Washer Pump Circuit Fault....111
522416.06 - Front Lower Wiper Hi Speed Circuit Fault....111
522418.06 - Front Lower Wiper Low Speed Circuit Fault....111
522433.06 - Rear Wiper Low Speed Circuit Fault....111
522434.06 - Front Wiper Low Speed Circuit Fault....111
522435.06 - Front Wiper Hi Speed Circuit Fault....111
522796.06 - Rear Washer Pump Circuit Fault....111
522797.06 - Front Washer Pump Circuit Fault....111
523688.03 - Steering Angle Sensor Circuit Fault....111
523688.04 - Steering Angle Sensor Circuit Fault....111
523689.04 - Diff Lock Switch Circuit Fault....111
523901.04 - Front Window Switch Circuit Fault....111
524044.01 - Axle Oil Filter Restricted....111
524044.03 - Axle Oil Filter Restriction Switch Circuit Fault....111
Group 50: Hydraulic Valve Controller (HVC) Diagnostic Trouble Codes....720
Hydraulic Valve Controller (HVC) Diagnostic Trouble Codes....720
000237.02 - Vehicle Identification Fault....111
000237.13 - Vehicle Identification Fault....111
000237.31 - Vehicle Identification Fault....111
000628.12 - Control Unit Programming....111
000629.12 - Control Unit Fault....111
000639.12 - Communication System Message Missing....111
000639.14 - Communication System Fault....111
001231.12 - Communication System Message Missing....111
001231.14 - Communication System Fault....111
001503.04 - Left Armrest Position Circuit Fault....111
001503.13 - Left Armrest Position Circuit Fault....112
001565.04 - Left Armrest Down Switch Circuit Fault....112
001566.04 - Right Armrest Down Switch Circuit Fault....112
001899.03 - Circle Side Shift Valve Circuit Fault....112
001899.04 - Circle Side Shift Valve Circuit Fault....112
001899.15 - Circle Side Shift Valve Warm Up Circuit....112
001899.17 - Circle Side Shift Valve Warm Up Circuit....112
001900.03 - Circle Side Shift Valve Circuit Fault....112
001900.04 - Circle Side Shift Valve Circuit Fault....112
001900.15 - Circle Side Shift Valve Warm Up Circuit....112
001900.17 - Circle Side Shift Valve Warm Up Circuit....112
001911.03 - Wheel Lean Valve Circuit Fault....112
001911.04 - Wheel Lean Valve Circuit Fault....112
001911.15 - Wheel Lean Valve Warm Up Circuit Fault....112
001911.17 - Wheel Lean Valve Warm Up Circuit Fault....112
001912.03 - Wheel Lean Valve Circuit Fault....112
001912.04 - Wheel Lean Valve Circuit Fault....112
001912.15 - Wheel Lean Valve Warm Up Circuit Fault....112
001912.17 - Wheel Lean Valve Warm Up Circuit Fault....112
001923.03 - Right Blade Lift Valve Circuit Fault....112
001923.04 - Right Blade Lift Valve Circuit Fault....112
001923.15 - Right Blade Lift Valve Warm Up Circuit Fault....112
001923.17 - Right Blade Lift Valve Warm Up Circuit Fault....112
001924.03 - Right Blade Lift Valve Circuit Fault....112
001924.04 - Right Blade Lift Valve Circuit Fault....112
001924.15 - Right Blade Lift Valve Warm Up Circuit Fault....112
001924.17 - Right Blade Lift Valve Warm Up Circuit Fault....112
001935.03 - Articulation Valve Circuit Fault....112
001935.04 - Articulation Valve Circuit Fault....112
001935.15 - Articulation Valve Warm Up Circuit Fault....112
001935.17 - Articulation Valve Warm Up Circuit Fault....112
001936.03 - Articulation Valve Circuit Fault....112
001936.04 - Articulation Valve Circuit Fault....112
001936.15 - Articulation Valve Warm Up Circuit Fault....113
001936.17 - Articulation Valve Warm Up Circuit Fault....113
001947.03 - Circle Rotate Valve Circuit Fault....113
001947.04 - Circle Rotate Valve Circuit Fault....113
001947.15 - Circle Rotate Valve Warm Up Circuit Fault....113
001947.17 - Circle Rotate Valve Warm Up Circuit Fault....113
001948.03 - Circle Rotate Valve Circuit Fault....113
001948.04 - Circle Rotate Valve Circuit Fault....113
001948.15 - Circle Rotate Valve Warm Up Circuit Fault....113
001948.17 - Circle Rotate Valve Warm Up Circuit Fault....113
001959.03 - Blade Side Shift Valve Circuit Fault....113
001959.04 - Blade Side Shift Valve Circuit Fault....113
001959.15 - Blade Side Shift Valve Warm Up Circuit....113
001959.17 - Blade Side Shift Valve Warm Up Circuit....113
001960.03 - Blade Side Shift Valve Circuit Fault....113
001960.04 - Blade Side Shift Valve Circuit Fault....113
001960.15 - Blade Side Shift Valve Warm Up Circuit Fault....113
001960.17 - Blade Side Shift Valve Warm Up Circuit Fault....113
001971.03 - Left Blade Lift Valve Circuit Fault....113
001971.04 - Left Blade Lift Valve Circuit Fault....113
001971.15 - Left Blade Lift Valve Warm Up Circuit Fault....113
001971.17 - Left Blade Lift Valve Warm Up Circuit Fault....113
001972.03 - Left Blade Lift Valve Circuit Fault....113
001972.04 - Left Blade Lift Valve Circuit Fault....113
001972.15 - Left Blade Lift Valve Warm Up Circuit Fault....113
001972.17 - Left Blade Lift Valve Warm Up Circuit Fault....113
002000.09 - Communication System Message Missing....113
002003.09 - Communication System Message Missing....113
002033.09 - Communication System Message Missing....113
002034.09 - Communication System Message Missing....113
002040.09 - Communication System Message Missing....113
002160.09 - Communication System Message Missing....113
002161.09 - Communication System Message Missing....113
002162.09 - Communication System Message Missing....114
002163.09 - Communication System Message Missing....114
002170.09 - Communication System Message Missing....114
002171.09 - Communication System Message Missing....114
002172.09 - Communication System Message Missing....114
002173.09 - Communication System Message Missing....114
002174.09 - Communication System Message Missing....114
002226.09 - Communication System Message Missing....114
005493.04 - Right Armrest Position Circuit Fault....114
005493.13 - Right Armrest Position Circuit Fault....114
520752.04 - Return to Straight Switch 1 Circuit Fault....114
520753.04 - Return to Straight Switch 2 Circuit Fault....114
520754.04 - Return to Straight Switch 3 Circuit Fault....114
520755.04 - Return to Straight Switch 4 Circuit Fault....114
521900.10 - Articulation Angle Sensor Fault....114
523849.13 - Return to Straight Module Circuit Fault....114
Group 60: Auxiliary Valve Controller (AVC) Diagnostic Trouble Codes....881
Auxiliary Valve Controller (AVC) Diagnostic Trouble Codes....881
000237.02 - Vehicle Identification Fault....114
000237.13 - Vehicle Identification Fault....114
000237.31 - Vehicle Identification Fault....114
000628.12 - Control Unit Programing....114
000629.12 - Control Unit Fault....114
000639.12 - Communication System Message Missing....114
000639.14 - Communication System Fault....114
001231.12 - Communication System Message Missing....114
001231.14 - Communication System Fault....114
001995.03 - Blade Pitch Valve Circuit Fault....114
001995.04 - Blade Pitch Valve Circuit Fault....114
001995.15 - Blade Pitch Valve Warm Up Circuit Fault....114
001995.17 - Blade Pitch Valve Warm Up Circuit Fault....114
001996.03 - Blade Pitch Valve Circuit Fault....114
001996.04 - Blade Pitch Valve Circuit Fault....114
001996.15 - Blade Pitch Valve Warm Up Circuit Fault....115
001996.17 - Blade Pitch Valve Warm Up Circuit Fault....115
002000.09 - Communication System Message Missing....115
002003.09 - Communication System Message Missing....115
002033.09 - Communication System Message Missing....115
002040.09 - Communication System Message Missing....115
002160.09 - Communication System Message Missing....115
002161.09 - Communication System Message Missing....115
Section 9005: Operational Checkout Procedure....1215
Group 10: Operational Checkout Procedure....1215
Operational Checkout....1257
Section 9010: Engine....1298
Group 05: Theory of Operation....1298
John Deere Engine Theory of Operation....1300
Cold Weather Start Aid....1301
Soft Start....1304
Engine Identification....1305
Engine Speed....1309
Group 10: System Diagrams....1298
Engine Cooling System Component Location....1312
Engine Fuel System Component Location....1314
Engine Intake and Exhaust Component Location....1316
Group 15: Diagnostic Information....1298
John Deere Engine Diagnostic Information....1319
Engine Sampling Port Location....1320
Group 25: Tests....1298
John Deere Engine....1322
Fluid Sampling Procedure....1323
Engine Slow and Fast Idle Speed Check....1328
Radiator Temperature Differential Test....1329
Intake Manifold Pressure Test-Turbocharger Boost—9.0L Stage II....1331
Turbocharger Wastegate Actuator Test—Engine 6090HDW38....1333
Section 9015: Electrical System....1335
Group 05: Theory of Operation....1335
Controller Area Network (CAN) Theory of Operation....1344
Start and Charge Circuits Theory of Operation....1348
Park Brake Circuit Theory of Operation....1354
Primary Display Unit (PDU) and Sealed Switch Module (SSM) Circuits Theory of Operation....1356
Engine Control Unit (ECU) Circuit Theory of Operation....1360
Transmission Control Unit (TCU) Circuit Theory of Operation....1365
Hydraulic Valve Controller (HVC) Circuit Theory of Operation....1374
Auxiliary Valve Controller (AVC) Circuit Theory of Operation....1382
Six-Wheel Drive (6WD) Circuit Theory of Operation....1388
Vehicle Control Unit (VCU) Circuit Theory of Operation....1393
Hydraulic Fan Speed and Fan Reversing Circuits Theory of Operation....1402
Differential Lock Circuit Theory of Operation....1407
Saddle Lock Circuit Theory of Operation....1410
Drive Lights, Marker Lights, Hazards, and Turn Lights Circuits Theory of Operation....1412
Work Lights Circuit Theory of Operation....1416
Brake Lights and Brake Accumulator Pressure Warning Circuit Theory of Operation....1419
Backup Lights Circuit Theory of Operation—If Equipped....1421
Beacon Light Circuit Theory of Operation—If Equipped....1423
Wipers and Washers Circuits Theory of Operation....1425
Rear Window Defog and Heated Side Mirrors Circuits Theory of Operation....1430
Air Conditioner, Heater, and Precleaner Circuits Theory of Operation....1433
JDLink™ Circuit Theory of Operation....1437
Group 10: System Diagrams....1335
Electrical Diagram Information....1443
Electrical Schematic Symbols....1447
Fuse and Relay Specifications....1450
System Functional Schematic, Wiring Diagram, and Component Location Master Legend....1454
System Functional Schematic....1464
Power and Ground Cables Component Location....1472
Power and Ground Cables Wiring Diagram....1473
Front 6WD Harness (W10) Component Location....1476
Front 6WD Harness (W10) Wiring Diagram....1478
Cab Roof Harness (W14) Component Location....1479
Cab Roof Harness (W14) Wiring Diagram....1481
Cab Interior Harness (W15) Component Location—6WD....1483
Cab Interior Harness (W15) Wiring Diagram—6WD....1487
Cab Interior Harness (W16) Component Location—Non 6WD....1503
Cab Interior Harness (W16) Wiring Diagram—Non 6WD....1507
Front Motor Speed Sensor Harnesses (W17 and W18) Component Location—6WD....1521
Front Motor Speed Sensor Harnesses (W17 and W18) Wiring Diagram—6WD....1522
Blade Impact Harness (W19) Component Location—If Equipped....1524
Blade Impact Harness (W19) Wiring Diagram—If Equipped....1525
Turn-Tail-Stop Light Harness (W20) Component Location....1526
Turn-Tail-Stop Light Harness (W20) Wiring Diagram....1527
Drive and Turn Lights Harnesses (W22 and W23) Component Location....1528
Drive and Turn Lights Harnesses (W22 and W23) Wiring Diagram....1529
Steering Angle Sensor Harness (W24) Component Location—6WD....1531
Steering Angle Sensor Harness (W24) Wiring Diagram—6WD....1532
Front Platform Harness (W25) Component Location....1533
Front Platform Harness (W25) Wiring Diagram....1535
Rear Platform Harness (W26) Component Location....1540
Rear Platform Harness (W26) Wiring Diagram....1543
Rear Camera Harness (W27) Component Location—If Equipped....1545
Rear Camera Harness (W27) Wiring Diagram—If Equipped....1546
Front Camera Harness (W28) Component Location—If Equipped....1547
Front Camera Harness (W28) Wiring Diagram—If Equipped....1548
Fan Door Harness (W31) Component Location....1549
Fan Door Harness (W31) Wiring Diagram....1550
Heater and Air Conditioner Harness (W32) Component Location....1551
Heater and Air Conditioner Harness (W32) Wiring Diagram....1552
Radio Harness (W33) Component Location....1553
Radio Harness (W33) Wiring Diagram....1555
Midstructure Harness (W34) Component Location....1556
Midstructure Harness (W34) Wiring Diagram....1557
Transmission Harness (W35) Component Location....1558
Transmission Harness (W35) Wiring Diagram....1560
Tilt Console Harness (W36) Component Location....1562
Tilt Console Harness (W36) Wiring Diagram....1564
Electrohydraulic (EH) Main Cab Harness (W38) Component Location....1566
Electrohydraulic (EH) Main Cab Harness (W38) Wiring Diagram....1569
Electrohydraulic (EH) Main Frame Harness (W39) Component Location....1573
Electrohydraulic (EH) Main Frame Harness (W39) Wiring Diagram....1577
Electrohydraulic (EH) Draft Frame Harness (W40) Component Location....1582
Electrohydraulic (EH) Draft Frame Harness (W40) Wiring Diagram....1583
Electrohydraulic (EH) Armrest Harnesses (W44 and W45) Component Location....1587
Electrohydraulic (EH) Armrest Harnesses (W44 and W45) Wiring Diagram....1589
Electrohydraulic (EH) Integrated Grade Control (IGC) Harnesses (W48 and W49) Component Location....1591
Electrohydraulic (EH) Integrated Grade Control (IGC) Harnesses (W48 and W49) Wiring Diagram....1593
Engine Interface Harness (W50) Component Location....1596
Engine Interface Harness (W50) Wiring Diagram....1597
Engine Harness (W55) Component Location—Engine 6090HDW38....1598
Engine Harness (W55) Wiring Diagram—Engine 6090HDW38....1600
Engine Harness (W56) Component Location—Engine 6090HDW37....1602
Engine Harness (W56) Wiring Diagram—Engine 6090HDW37....1604
Auxiliary Radio Input Harness (W59) Component Location—If Equipped....1606
Auxiliary Radio Input Harness (W59) Wiring Diagram—If Equipped....1607
License Plate Harness (W65) Component Location....1608
License Plate Harness (W65) Wiring Diagram....1609
Camera Display Harness (W67) Component Location....1610
Camera Display Harness (W67) Wiring Diagram....1611
Hydraulic Pump Pressure Sensor Harness (W68) Component Location....1613
Hydraulic Pump Pressure Sensor Harness (W68) Wiring Diagram....1614
Drive Light Extension Jumper Harnesses (W75 and W76) Component Location—If Equipped....1615
Drive Light Extension Jumper Harnesses (W75 and W76) Wiring Diagram—If Equipped....1617
Diesel Fired Coolant Heater (DFCH) Harness (W77) Component Location—If Equipped....1619
Diesel Fired Coolant Heater Harness (W77) Wiring Diagram—If Equipped....1620
Engine Work Light Harness (W79) Component Location....1621
Engine Work Light Harness (W79) Wiring Diagram....1622
Blade Lift Cylinder Harnesses (W82 and W83) Component Location....1624
Blade Lift Cylinder Harnesses (W82 and W83) Wiring Diagram....1625
Circle Side Shift Cylinder Harness (W84) Component Location....1628
Circle Side Shift Cylinder Harness (W84) Wiring Diagram....1629
Six-Wheel Drive (6WD) Pump Harness (W90) Component Location....1631
Six-Wheel Drive (6WD) Pump Harness (W90) Wiring Diagram....1632
JDLink™ Harnesses (W6002 and W6003) Component Location—If Equipped....1634
JDLink™ Modular Telematics Gateway (MTG) Harness (W6002) Wiring Diagram—If Equipped....1636
JDLink™ Satellite (SAT) Harness (W6003) Wiring Diagram—If Equipped....1637
Group 15: Diagnostic Information....1338
Electrical Component Specifications....1646
Vehicle Control Unit (VCU) Outputs....1654
Service ADVISOR™ Application....1658
Service ADVISOR™ Connection Procedure....1659
Service ADVISOR™ Remote (SAR) Connection Procedure....1661
Reading Diagnostic Trouble Codes (DTCs) With Service ADVISOR™ Application....1663
Intermittent Diagnostic Trouble Code (DTC) Diagnostics....1666
JDLink™ Connection Procedure—If Equipped....1667
Group 16: Monitor Operation....1338
Primary Display Unit (PDU)—Service Mode....1670
Service Menu—Display Settings—Menu Access....1672
Service Menu—Diagnostics—Codes—Clear Codes....1673
Service Menu—Diagnostics—OBD Tool....1674
Service Menu—Diagnostics—OBD Tool—Auxiliary Valve Controller (AVC)....1676
Service Menu—Diagnostics—OBD Tool—Hydraulic Valve Controller (HVC)....1682
Service Menu—Diagnostics—OBD Tool—Six-Wheel Drive (6WD) Controller (HWD)....1688
Service Menu—Diagnostics—OBD Tool—Transmission Control Unit (TCU)....1695
Service Menu—Diagnostics—OBD Tool—Vehicle Control Unit (VCU)....1705
Service Menu—Machine Setup—Tire Size....1715
Service Menu—Machine Setup—Auto Shutdown....1716
Service Menu—Machine Setup—Auxiliary Valve Controls....1717
Group 17: Diagnostic Test Box....1339
Setup and Functional Test....1727
Two Wire Sensor Circuit Check—Out of Range High....1736
Two Wire Sensor Circuit Check—Out of Range Low....1738
Three Wire Sensor Circuit Check—Out of Range High....1740
Three Wire Sensor Circuit Check—Out of Range Low....1742
Group 20: Adjustments....1339
Transmission Control Unit (TCU) Calibration....1747
Six-Wheel Drive (6WD) Controller Calibration—If Equipped....1750
Six-Wheel Drive (6WD) Motor Incomplete Calibration Test....1753
CAN Circuit Testing....1757
Lower Windshield Wiper Proximity Switch Adjustment and Installation....1763
Articulation Sensor Linkage Adjustment (Rear Steer)....1765
Electrohydraulic Valve Calibration Procedure....1766
Articulation Sensor Calibration Procedure....1769
Steering Angle Sensor Calibration Procedure....1770
Blade Lift Cylinder Learning Procedure....1771
Cylinder Offset Calibration Procedure....1776
Set Machine Hours in Primary Display Unit (PDU)....1781
Group 25: Tests....1339
Component Exchange Diagnostic Test....1784
Alternator Test....1786
Output Shaft Speed Sensor Test....1790
Inching Pedal Module Test....1791
Accelerator Pedal Sensor Test....1795
Hydraulic Pump Pressure Sensor Test....1797
Hydraulic Fan Speed Sensor Test....1800
Switch Test....1803
Wiper Motor Test....1808
Electrical Component Checks....1810
Connector Terminal Test....1816
Section 9016: Six-Wheel Drive (6WD)....1819
Group 05: Theory of Operation....1819
Six-Wheel Drive (6WD) System Operation....1823
6WD Pump and Displacement Control Operation....1825
Six-Wheel Drive (6WD) Forward Operation....1826
Six-Wheel Drive (6WD) Pump Operation....1829
Six-Wheel Drive (6WD) Charge Circuit Operation....1831
Flushing Valve and Charge Pressure Regulating Valve Operation....1833
Six-Wheel Drive (6WD) Circuit Relief and Make-Up Valve Operation....1835
Six-Wheel Drive (6WD) Engagement Manifold Operation....1838
Six-Wheel Drive (6WD) Motor Operation....1840
6WD Wheel Operation....1842
6WD Precision Mode Operation....1844
6WD Inching Mode Operation....1846
Group 10: System Diagrams....1819
Six-Wheel Drive (6WD) System Schematic....1849
Six-Wheel Drive (6WD) System Component Location....1851
Group 15: Diagnostic Information....1819
No Front Wheel Motion (Both Wheels)....1819
No Front Wheel Motion During Inching Operation (Both Wheels)....1819
No Front Wheel Motion (One Wheel)....1819
Intermittent or Erratic Six-Wheel Drive (6WD) Operation....1819
Six-Wheel Drive (6WD) Charge Pressure Indicator Light On....1819
Hydraulic Oil Temperature Indicator Light On....1819
Six-Wheel Drive (6WD) System Oil Temperature Too Hot (6WD Oil Temperature Indicator On)....1819
Low Torque (One Wheel)....1819
Low Torque (Both Wheels)....1819
Wheel Overspeed (One Wheel)....1819
Operates in Low Speed Only (One Wheel)....1819
Operates in High Speed Only (One Wheel)....1819
Wheels Will Not Stay in Neutral....1819
Operates in One Direction Only....1819
Wheels Rotate Opposite Each Other....1820
Six-Wheel Drive (6WD) Will Not Calibrate (No Diagnostic Trouble Codes)....1820
Group 20: Adjustments....1820
6WD Start-Up Procedure....1903
Six-Wheel Drive (6WD) Pump Control Neutral Adjustment....1905
Group 25: Tests....1820
Six-Wheel Drive (6WD) Oil Warm-Up Procedure....1910
Six-Wheel Drive (6WD) Planetary Brake Leakage Test....1911
Six-Wheel Drive (6WD) Neutral Charge Pressure Test....1914
Six-Wheel Drive (6WD) Charge Pressure Regulating Valve Test....1918
Six-Wheel Drive (6WD) Neutral Charge Pressure Balance Test....1923
Six-Wheel Drive (6WD) Motor Leakage Test....1926
Six-Wheel Drive (6WD) Circuit Relief and Make-Up Valve Test....1931
6WD Charge Pump Flow Test....1936
Six-Wheel Drive (6WD) Engagement Solenoid Valve Test....1937
Six-Wheel Drive (6WD) Hydraulic Oil Cooler Bypass Valve Pressure Test....2286
Section 9020: Power Train....1943
Group 05: Theory of Operation....1943
DF180 Powershift Transmission Operation....1947
Differential Lock Operation....1949
Internal Park Brake Operation....1953
Rear Axle and Tandem Operation....1955
Group 10: System Diagrams....1943
Power Train Schematic....1958
Power Train Component Location....1960
Group 15: Diagnostic Information....1943
Transmission Overfills With Oil....1943
Transmission Slippage....1943
Machine “Jumps” When Inching Pedal Engaged....1943
Machine Lacks Power Or Moves Slow....1943
Transmission Shifts Too Slow (Machine Stops When Changing Gears Under Load)....1943
Transmission Shifts Too Quickly....1943
Machine Will Not Move In Any Gear and Park Brake Indicator Light Is On (No Load Put On Engine When Shifted Into Gear)....1943
Machine Will Not Move (Load Put On Engine Or Engine Stalls When Shifted Into Gear)....1943
Low Pressure In Different Gears Using Same Proportional Solenoid Valve....1943
Machine Creeps In Neutral (Load Put On Engine When Service Brakes Are Applied)....1943
Machine Creeps In Gear With Inching Pedal Fully Depressed....1943
Transmission System Overheats....1943
Transmission Control Lever Does Not Move Freely....1943
Excessive Transmission Noise (Under Load or No Load)....1943
Transmission Engages In a Gear, but Not Gear Selected....1943
Transmission Fails To Change Gear From First Gear Selected....1943
Transmission Faults To Neutral....1943
Excessive Machine Vibration....1943
Erratic Transmission Oil Pressure....1943
Excessive Oil Pressure....1943
Low Oil Pressure In All Gears....1943
Low Pressure In One Gear But Correct In Other Gears....1943
Transmission Breather Oil Leakage....1944
Filter Or Filter Oil Lines Blow Out....1944
Low Lube Pressure In Some Gears But Correct In Other Gears....1944
Excessive Lube Pressure In Some Gears But Correct In Other Gears....1944
Low Transmission Cooler Inlet Pressure And Lube Pressure....1944
Park Brake Engages While Vehicle Is Moving....1944
Park Brake Will Not Release....1944
Park Brake Will Not Hold....1944
Park Brake Overheats....1944
Park Brake Noisy....1944
No Differential Lock Operation....1949
Differential Lock Slippage....1944
Excessive Differential and/or Axle Noise....1944
Group 25: Tests....1944
Differential Oil Warm-Up Procedure....2017
Differential Lock Valve Pressure Test....2019
Differential Lock Charge Pump Flow Test....2021
Differential Oil Cooler Differential Pressure Test....2023
Differential Oil Cooler Bypass Valve Pressure Test....2027
Transmission Oil Cooler Differential Pressure Test....2030
Park Brake Release Pressure Test....2034
Section 9025: Hydraulic System....2035
Group 05: Theory of Operation....2035
Hydraulic System Operation....2040
Hydraulic Pump Operation....2042
Hydraulic Fan Pump Operation....2045
Hydraulic System Manifold Operation....2046
Control Valve Operation—Standard Controls....2048
Control Valve Operation—EH Controls....2052
Hydraulic Oil Filter Operation....2056
System Relief Valve Operation....2058
Circuit Relief Valve Operation....2059
Service Brake Valve Operation....2060
Service Brake Accumulator Operation....2062
Hydraulic Fan Drive Operation....2064
Steering System Operation....2068
Steering System Operation—EH Controls....2070
Load Sense Operation With All Functions in Neutral....2072
Load Sense Operation With One Function Activated....2074
Load Sense Operation With Multiple Functions Activated....2076
Wheel Lean, Articulation, Circle Side Shift, Blade Pitch, and Blade Side Shift Valve Operation....2079
Circle Rotate Valve Operation....2081
Saddle Locking Pin Valve Operation....2083
Blade Lift and Auxiliary Valve Operation....2085
Blade Impact Absorption System Operation....2088
Circle Drive Gearbox Operation-Without Slip Clutch....2091
Circle Drive Gearbox Operation-With Slip Clutch....2093
Dual Input Circle Drive Gearbox Operation—If Equipped....2096
Dual Input Circle Drive Gearbox (With Slip Clutch) Operation—If Equipped....2098
Hydraulic Oil Cooler Bypass Manifold Operation....2100
Group 10: System Diagrams....2035
Hydraulic Schematic Symbols....2105
Hydraulic System Schematic....2109
Hydraulic System Schematic—EH Controls....2113
Hydraulic System Component Location....2118
Hydraulic System Component Location—EH Controls....2124
Group 15: Diagnostic Information....2036
No Hydraulics....2036
Hydraulic System Overheats....2036
Slow Hydraulic Functions....2036
Hydraulic Function (or Pump) Makes “Chattering” Noise....2036
Pump Appears To Be Stuck At Minimum Displacement....2036
Pump Appears To Be Stuck At Maximum Displacement....2036
Function Moves Too Fast....2036
Function Drifts Down....2036
Excessive Effort to Move Function Control Lever....2036
Individual Function Is Slow (Cycle Time Checked Slow)....2036
Slow or Hard Steering....2036
No Steering....2036
Erratic Steering....2036
Excessive Steering Wheel Turns to Steer Machine....2036
Wheels Move After Steering Wheel Stopped....2036
Excessive Vibration of Steering Wheel....2036
Steering Wheel Kickback....2036
Poor or No Brakes (Steering and Hydraulic System Operation Normal)....2036
Aggressive Brakes or Brakes Lock Up....2036
Brakes Drag....2036
Brakes Chatter or Noisy....2036
Delay in Braking....2036
Hydraulic Fan Does Not Reach Full Speed....2036
Hydraulic Fan Runs At Full Speed Only....2036
Hydraulic Fan Does Not Spin....2036
Hydraulic Fan Will Not Reverse Direction....2036
Group 25: Tests....2036
JT02156A Digital Pressure and Temperature Analyzer Kit Installation....2196
Hydraulic Oil Warm-Up Procedure....2197
Vacuum Pump Installation....2198
Hydraulic Pump Standby Pressure Hydraulic Pump Standby Pressure & Load Sense Standby Pressure Test{pgNO}2037 Load Sense Standby Pressure Test....2199
Load Sense Relief Valve Load Sense Relief Valve & Pump Relief Test{pgNO}2037 Pump Relief Test....2204
System Relief Valve Pressure Test....2209
Load Sense Shuttle Valve Isolation Test—Standard Controls....2213
Load Sense Shuttle Valve Isolation Test—EH Controls....2219
Hydraulic Pump Leakage Test....2225
Hydraulic Pump Flow Test....2227
Service Brake Valve Pressure Test....2230
Service Brake Accumulator Precharge Test....2233
Service Brake Pressure Switch Test....2236
Service Brake Valve Leakage Test....2239
Hydraulic Cylinder Drift Test....2241
Hydraulic Cylinder Leakage Test....2243
Rotary Manifold Leakage Test....2246
Steering System Leakage Test....2250
Service Brake Accumulator Inlet Check Valve Leakage Test....2256
Blade Impact Absorption Accumulator Charge Pressure Test....2259
Blade Impact Absorption Accumulator Hydraulic Discharge Procedure....2262
Secondary Steering Accumulator Charge Pressure Test....2264
Blade Lift Relief Valve Test....2267
Circuit Relief Valve Test—Midmount Scarifier....2270
Saddle Locking Cylinder Pressure Reducing Valve Test....2272
Hydraulic Fan Pump Flow Test....2275
Hydraulic Fan Pump Pressure Test....2278
Hydraulic Fan Motor Case Drain Test....2281
Hydraulic Fan Motor Speed Test....2284
Hydraulic Oil Cooler Bypass Valve Pressure Test....2286
Section 9031: Heating and Air Conditioning....2289
Group 05: Theory of Operation....2289
Air Conditioning System Cycle of Operation....2292
Group 10: System Diagrams....2289
Air Conditioner and Heater Component Location....2296
Group 15: Diagnostic Information....2289
Diagnose Air Conditioning System Malfunctions....2299
Air Conditioning System Does Not Operate....2289
Air Conditioner Does Not Cool Interior of Cab....2289
Air Conditioner Runs Constantly, Too Cold....2289
Diagnose Heater System Malfunctions....2310
Heater System Does Not Operate....2289
Heater Does Not Warm Interior of Cab....2289
Interior Windows Continue to Fog....2289
Group 25: Tests....2289
R134a Refrigerant Cautions and Proper Handling....2322
Heater and Air Conditioner Operational Checks....2323
Operating Pressure Diagnostic Chart....2326
Air Conditioner Compressor Clutch Test....2328
Air Conditioner High/Low-Pressure Switch Test....2329
R134a Refrigerant Leak Test....2332
R134a Oil Charge Capacity....2333
R134a Refrigerant Charge Capacity....2334
Air Conditioner Freeze Control Switch Test....2335
Heater Blower Switch Test....2337
Heater Blower Resistor Test....2338
Heater Blower Motor Test....2340
R134a Air Conditioning System Test....2341
John Deere 770G, 770GP, 772G, and 772GP Motor Graders Diagnosis and Tests Service Technical Manual (TM14250X19)
