John Deere 7425, 7525, 6140J, 6155J, 6155JH Tractors Diagnosis and Tests Service Technical Manual (TM605919)
Complete Diagnosis & Tests Technical Manual with electrical wiring diagrams for John Deere Tractors 7425, 7525, 6140J, 6155J, 6155JH, with all the workshop information to maintain, diagnose, and rebuild like professional mechanics.
John Deere 7425, 7525, 6140J, 6155J, 6155JH Tractors 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.
TM605919 - 7425, 7525, 6140J, 6155J, 6155JH Tractors Technical Manual - Diagnosis and Tests.pdf
TM605919 - 7425, 7525, 6140J, 6155J, 6155JH Tractors Technical Manual - Diagnosis and Tests.epub
Total Pages: 1,261 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English
MAIN SECTIONS
Foreword
Safety
Safety Precautions
General References
Diagnostic Trouble Codes
BCU Diagnostic Trouble Codes
Observable Symptoms
Electrical System
Transmission
Drive Systems
Steering And Brakes
Hydraulic System
Engine
Function Test
Tests and Adjustments
Fuel, Air Intake and Cooling Systems
Tests and Adjustments
Descriptions
Electrical System
Sub-System Diagnostics (Cab Tractor)
Sub-System Diagnostics (Open Operator Station Tractor)
Component Tests
Functional schematics
Wiring Harnesses and Connectors
Electronic Control Units
Operation and General Information on Diagnostics
Data BUS Systems, Operation
BCU - Basic Control Unit
Forward/Reverse Module
Function Test
Tests and Adjustments
Operation
PowrQuad Transmissions
Preliminary Tests
Function Test
Tests and Adjustments
Operation
Drive Systems
Function Tests
Tests and Adjustments
Operation
Steering and Brakes
Function Test
Tests and Adjustments
Operation
Hydraulic System
Function Tests
Tests and Adjustments
Operation
Oil Filter, Charge Pump and Hydraulic Pump
Hitch
Selective Control Valves (SCV)
Hydraulic Block
Operator`s Cab
Tests and Adjustments
Operation
Special Tools (Dealer-Fabricated)
Special Tools (Dealer-Fabricated)
TABLE OF CONTENTS....1
Section 210: Safety....21
Group 05: Safety Precautions....21
Recognize Safety Information....24
Information - "Important"....25
Information - "Note"....26
Prevent Machine Runaway....27
Handle Fluids Safely—Avoid Fires....28
Prevent Battery Explosions....29
Prepare for Emergencies....30
Prevent Acid Burns....31
Avoid High-Pressure Fluids....33
Service Cooling System Safely....34
Remove Paint Before Welding or Heating....35
Avoid Heating Near Pressurized Fluid Lines....36
Work In Ventilated Area....37
Wear Protective Clothing....38
Practice Safe Maintenance....39
Park Machine Safely....40
Use Proper Lifting Equipment....41
Construct Dealer-Made Tools Safely....42
Support Machine Properly....43
Work in Clean Area....44
Illuminate Work Area Safely....45
Service Machines Safely....46
Use Proper Tools....47
Service Tires Safely....48
Safe Maintenance of Mechanical Front-Wheel Drive (MFWD) System....49
Do Not Look Directly Into Radar Tube....50
Keep ROPS Installed Properly....51
Replace Safety Signs....52
Dispose of Waste Properly....53
Live With Safety....54
Safety Measures for Electronic Control Units....55
Group 15: General References....22
Ref. 210-15-001, General References—Summary....57
Ref. 210-15-010, Unified Non-Metric Bolt and Cap Screw Torque Values....58
Ref. 210-15-015, Unified Metric Bolt and Cap Screw Torque Values....60
Ref. 210-15-020, Hydraulic System Non-Metric Fitting Torque Values....61
Ref. 210-15-025, Hydraulic System Metric Fitting Torque Values....62
Ref. 210-15-030, Component ID Table....64
Ref. 210-15-035, Reading a Functional Schematic....66
Ref. 210-15-040, Reading a Diagnostic Schematic....67
Ref. 210-15-045, Wiring Schematics and Symbols....69
Ref. 210-15-050, Visually Inspect Electrical System....71
Ref. 210-15-055, Electrical Circuit Malfunctions....72
Ref. 210-15-060, Seven Step Electrical Test Procedure....77
Ref. 210-15-065, Hydraulic System — Hydraulic Circuit Symbols....79
Section 211: Diagnostic Trouble Codes....85
Group BCU: BCU Diagnostic Trouble Codes....85
BCU 000070.31 - Park Brake Fault....85
BCU 000084.02 - Wheel speed sensor circuit problem....85
BCU 000168.16 - Excessive System Voltage (Engine Running)....85
BCU 000168.17 - Insufficient System Voltage (Engine above 1500 rpm)....85
BCU 000168.18 - Insufficient System Voltage (Engine speed up to 1500 rpm)....85
BCU 000186.02 - Rear PTO Speed Sensor Circuit Fault....85
BCU 000186.17 - No rear PTO speed detected....85
BCU 000190.02 - Engine speed sensor circuit fault....85
BCU 000629.12 - Control Unit internal problem....85
BCU 000639.12 - Control Unit internal problem....85
BCU 000746.31 - Differential Lock Solenoid Circuit Fault....85
BCU 000980.07 - Rear PTO Switch Connector Defective....85
BCU 001676.31 - LTC Coolant Pump Relay Circuit Fault....85
BCU 299780.07 - Turn Signal Switch Fault....85
BCU 302073.31 - Rear PTO solenoid circuit fault....85
BCU 302080.31 - Differential lock switch fault....85
BCU 302085.31 - MFWD switch defective....85
BCU 302086.31 - MFWD clutch solenoid circuit fault....85
BCU 302106.31 - Control unit internal problem....85
BCU 302123.31 - Signal from forward/reverse switch does not match not-neutral switch signal....85
BCU 302124.31 - Alternator relay electrical circuit fault....85
BCU 302131.31 - Turn signal switch circuit fault....85
BCU 302132.31 - Turn signal fuses F03/04 and/or F03/07 failed....85
BCU 302133.31 - Rear PTO Selector Fault....85
BCU 302240.31 - Control unit plugged into wrong wiring harness....85
BCU 303027.31 - Incorrect hitch control unit calibration....85
BCU 303028.31 - Hitch control unit not calibrated....85
BCU 303037.03 - 5 V power supply too high....85
BCU 303037.04 - 5 V power supply too low....85
BCU 303041.02 - Stepper motor coil 1 circuit open....85
BCU 303042.02 - Stepper motor coil 2 circuit open....85
BCU 303043.02 - Defective stepper motor coil 1 electrical circuit....86
BCU 303044.02 - Defective stepper motor coil 2 electrical circuit....86
BCU 303045.04 - System voltage too low....86
BCU 303047.03 - System voltage too high....86
BCU 303049.03 - Quick raise/lower rocker switch voltage too high....86
BCU 303049.04 - Quick raise/lower rocker switch voltage too low....86
BCU 303052.03 - Right draft sensor signal voltage too high....86
BCU 303052.04 - Right draft sensor signal voltage too low....86
BCU 303053.03 - Sensitivity potentiometer signal voltage too high....86
BCU 303053.04 - Sensitivity potentiometer signal voltage too low....86
BCU 303054.03 - Depth potentiometer signal voltage too high....86
BCU 303054.04 - Depth potentiometer voltage too low....86
BCU 303055.03 - Position sensor signal voltage too high....86
BCU 303055.04 - Position sensor signal voltage too low....86
BCU 303056.03 - Raise limit potentiometer signal voltage too high....86
BCU 303056.04 - Raise limit potentiometer signal voltage too low....86
BCU 303057.03 - Rate-of-drop potentiometer signal voltage too high....86
BCU 303057.04 - Rate-of-drop potentiometer signal voltage too low....86
BCU 303060.02 - Stepper motor free step out of range....86
BCU 303177.18 - Hydraulic oil temperature low during calibration....86
BCU 303252.02 - Distorted right draft sensor signal during calibration....86
BCU 303252.03 - Right draft sensor voltage too high during calibration....86
BCU 303252.04 - Right draft sensor voltage too low during calibration....86
BCU 303255.03 - Position sensor signal voltage too high during calibration....86
BCU 303255.04 - Position sensor signal voltage too low during calibration....86
BCU 303260.16 - Stepper motor (raise) free step above upper threshold during calibration....86
BCU 303260.18 - Stepper motor (raise) free step below lower threshold during calibration....86
BCU 303261.16 - Stepper motor (lower) free step above upper threshold during calibration....86
BCU 303261.18 - Stepper motor (lower) free step below lower threshold during calibration....86
Section 212: Observable Symptoms....208
Group 40: Electrical System....208
Control Unit(s) Not Displayed....208
Diagnostic Mode Cannot Be Entered or Connection Problems with Service ADVISOR (Cab Tractors)....208
Diagnostic Mode Cannot Be Accessed or Connection Problems with Service ADVISOR (Open operator's station)....208
Problems with the Battery....208
Problem with starter motor....208
Horn problem....208
Group 55: Transmission....208
PowrQuad Transmission Problem....208
Group 56: Drive Systems....208
Rear PTO problem....208
Group 60: Steering And Brakes....335
Brake Problem....208
Steering problem....208
Park brake problem....208
Group 70: Hydraulic System....208
Hydraulic hitch problem....208
Section 220: Engine....255
Group 10: Function Test....255
Ref. 220-10-010, Safety....257
Ref. 220-10-020, Engine Preliminary Checks....258
Group 15: Tests and Adjustments....255
Ref. 220-15-010, Dynamometer Test....260
Section 230: Fuel, Air Intake and Cooling Systems....261
Group 15: Tests and Adjustments....261
Ref. 230-15-001, Tests and Adjustments—Summary of References....263
Ref. 230-15-010, General Information....264
Ref. 230-15-020, Explanation of Tests....265
Ref. 230-15-030, Safety....266
Ref. 230-15-040, Special Tools....1199
Ref. 230-15-050, Specifications....269
Ref. 230-15-060, Intake System Test....270
Ref. 230-15-070, Cooling System Leak Test....272
Ref. 230-15-080, Thermostat Opening Pressure Test....274
Ref. 230-15-090, Variable Speed Fan Drive Test....276
Fuel System - Check the Fuel Transfer Pump....277
Hand Throttle Lever and Accelerator Pedal Adjustment....279
Ref. 230-15-120, Adjust Accelerator Pedal....280
Group 20: Descriptions....261
Ref. 230-20-001, Description of Components - Summary of References....283
Ref. 230-20-010, Fuel Supply System Description....284
Ref. 230-20-020, Air Intake System Operation....285
Ref. 230-20-030, Coolant System Description....286
Ref. 230-20-040, Cooling System Radiator Description....288
Ref. 230-20-060, Annular Oil Cooler Description (Transmission Oil)....289
Ref. 230-20-070, Variable Speed Fan Drive Operation ( -XXXXXX)....291
Ref. 230-20-080, Fan Belt Tensioner Operation....293
Section 240: Electrical System....294
Group 10: Sub-System Diagnostics (Cab Tractor)....294
Sub-System Diagnostics (Cab) — Summary of References....300
Special Tools....1199
Starter Motor and Charging Circuit....378
Panel Warning Lights....347
Horn....306
Lights....347
Work lights....399
Radio, Digital Clock, Dome and Console Lights....347
Fan and Air Conditioning System....315
Windshield Wiper and Washer....317
Beacon light - Optional....410
Electronic Hitch Control....411
Front-Wheel Drive....355
Differential Lock....325
Hazard Warning Lights Unit....421
Speed Sensor and Radar....330
Service socket....331
BUS Terminator and Terminating Resistor....332
BCU power supply....333
PTO....415
Brakes....335
Group 10A: Sub-System Diagnostics (Open Operator Station Tractor)....294
Sub-System Diagnostics (Open Operator Station Tractor)—Summary of References....338
Special Tools....1199
Starter Motor and Charging Circuit....378
Panel Warning Lights....347
Horn - Optional....393
Lights....347
Work lights....399
Electronic Hitch Control....411
PTO....415
Front-Wheel Drive....355
Differential lock....419
Hazard Warning Lights Unit....421
Speed Sending Units....362
Power Feed....363
Brake System....423
Service Socket....366
BUS Terminating Resistor....367
Group 15: Component Tests....295
Starter Motor and Charging Circuit....378
Instrument Panel....388
Horn - Optional....393
Lighting Circuits....395
Work lights....399
Dome Light....401
Fan, Air Conditioning and Automatic A/C control....402
Windshield Wiper and Washer System....408
Beacon light - Optional....410
Electronic Hitch Control....411
PTO....415
BCU (FWD)....417
Differential lock....419
Hazard Warning Lights Unit....421
Brake System....423
Group 25C: Functional schematics....295
Functional Schematic and Wiring Harnesses (Cab Tractor) — Summary of References....425
Fuses and Relays....426
Fuse and Relay Box - Tractors with Open Operator Station....430
Group 26: Wiring Harnesses and Connectors....435
Wiring Harnesses and Connectors....435
Wiring Harness - Power Supply (Open Operator's Station)....437
Wiring Harness - Power Supply (Cab Tractors)....440
Engine Wiring Harness (Open Operator's Station)....443
Engine Wiring Harness (Cab Tractors)....453
Harness - Headlights....463
Harness - Cab (Cab Tractors)....466
F101 - F120....470
F021/1 - F021/3....473
F023/1 - F023/3....474
K101 - K113....475
M5....480
S17....481
X14/1....482
X14/2....483
X28....484
X35....485
X37....486
X58....487
X106....488
X107....489
X112/1A....490
X112/1B....491
X112/2A....492
X112/2B....493
X113/1....494
X113/2....495
X122....496
X125....497
X158....498
X182....499
X188....501
X239....502
X245....503
X269F....504
X269M....505
X321....506
X324....507
X400....508
X406/1F....510
X406/1M....511
X430....512
X431....514
X450....516
X473....518
X504....519
X505....521
X515....523
X544....524
X560F....525
X560M....526
X571....527
X587M....528
X588....529
X613....530
X614....531
X615....532
X616/1....533
X616/2....535
X616/3....537
XGND1....539
XGND1/1....540
XGND2....542
XGND2/1....543
XGND5....544
XGND5/1....545
Cowl Harness (Cab Tractors)....546
Cab Roof Harness (Cab Tractors)....560
Windshield Wiper Harness - Rear....569
Harness - Air Conditioning and Fan (Cab Tractors)....575
Wiring Harness - Front End of Transmission (Open Operator's Station)....584
Harness - Transmission Front End (Cab Tractors)....589
Harness - Transmission Rear End (Cab Tractors)....596
Harness - Transmission Rear End (Open Operator's Station)....607
Section 245: Electronic Control Units....612
Group 05: Operation and General Information on Diagnostics....612
Special Tools....1199
General Operation and Entering the Program Mode....616
Calling up Addresses and Diagnostic Trouble Codes....624
Electronic Control Units— Summary of Addresses....636
Group 20: Data BUS Systems, Operation....612
Data BUS systems — Summary of References....643
Data BUS systems....644
CAN BUS Systems....645
CAN-BUS Systems on Cab and Open Operator's Station Tractors....648
CAN BUS Systems – Plug Layout....649
Group BCU: BCU - Basic Control Unit....612
BCU — Basic Control Unit — Summary of References....652
Hitch Control Calibration and Input Addresses....654
Test Procedure in the Case of Occasional BCU Circuit Problems....668
Circuit test for PTO Switch (S21)....670
Circuit test for front-wheel drive switch (S63)....674
Circuit test for Differential Lock Switch (S22)....677
Circuit test for hazard warning switch (S62)....680
Circuit test for Hazard Warning Switch (S66)....684
Circuit test for turn signal switch (S08)....688
Circuit test for Engine Speed Sender (B01)....692
Circuit test for Rockshaft Control Stepper Motor (M08)....733
Circuit test for Sensitivity Potentiometer (B26)....697
Circuit test for Depth-setting Potentiometer (B27)....700
Circuit test for Position Sensor (B21)....703
Circuit test for Rate-of-Drop Potentiometer (B27)....707
Circuit test for Raise-Limit Potentiometer (B27)....710
Circuit/harness test for Rapid Raise Switch (S24)....713
Circuit test for PTO Solenoid Valve (Y04)....716
Circuit test for Front-Wheel Drive Solenoid Valve (Y03)....719
Circuit test for Differential Lock Solenoid Valve (Y05)....722
Circuit test on R.H. Draft Sensor (B19)....725
Circuit test on L.H. Draft Sensor (B20)....729
Circuit test for Rockshaft Control Stepper Motor (M08)....733
BCU — Theory of Operation (Basic Functions)....735
Theory of Operation (Hitch Control)....738
Section 251: Forward/Reverse Module....740
Group 10: Function Test....740
Reference 251-10-001, Forward/Reverse Module—Function Test....747
Group 15: Tests and Adjustments....740
Ref. 251-15-001, Forward/Reverse Module—System Test.....759
Ref. 251-15-002, Forward/Reverse Module—System Pressure Test....766
Ref. 251-15-003, Forward/Reverse Module—System Pressure Adjustment....767
Ref. 251-15-004, Forward/Reverse Module—Test of Components Associated with System Pressure.....768
Ref. 251-15-005, Forward/Reverse Module—Filter Relief Valve Test....769
Ref. 251-15-006, Forward/Reverse Module—Engagement Override Valve and Clutch Pedal Valve Test.....771
Ref. 251-15-007, Forward/Reverse Module—Disk Clutch and Disk Brake Test....773
Ref. 251-15-008, Forward/Reverse Module—Lube Oil Pressure Test....774
Ref. 251-15-009, Forward/Reverse Module—Cooling System Test....775
Ref. 251-15-010, Forward/Reverse Module—Flow Rate Test....777
Ref. 251-15-011, Forward/Reverse Module—Cooler Relief Valve Test.....779
Ref. 251-15-012, Forward/Reverse Module—Transmission Oil Filter Test....781
Ref. 251-15-013, Forward/Reverse Module—Modulation Time Adjustment....782
Ref. 251-15-014, Forward/Reverse Module—Test Port and Sensor Layout....783
Ref. 251-15-015, Forward/Reverse Module—Test and Adjust Shift Components.....784
Ref. 251-15-016, Forward/Reverse Module—Park Lock Adjustment....786
Ref. 251-15-017, Forward/Reverse Module—Test and Adjust Range Shift Linkage....788
Ref. 251-15-018, Forward/Reverse Module—Test and Adjust Gear Shift Linkage.....790
Ref. 251-15-019, Forward/Reverse Module—Forward/Reverse Lever Linkage Adjustment....792
Ref. 251-15-020, Forward/Reverse Module—Forward/Reverse Lever Adjustment....793
Ref. 251-15-021, Forward/Reverse Module—Clutch Pedal Adjustment....795
Group 20: Operation....740
Ref. 251-20-001, Forward/Reverse Module—Summary of References....798
Ref. 251-20-050, Forward/Reverse Module—Transmission Oil Circuit Operation (Schematic Included)....799
Ref. 251-20-100, Forward/Reverse Module—Cross-Sectional View....802
Ref. 251-20-110, Forward/Reverse Module—Components....804
Ref. 251-20-120, Forward/Reverse Module—Components and Power Flow....806
Ref. 251-20-130, Forward/Reverse Module—Transmission Oil Pump....809
Ref. 251-20-140, Forward/Reverse Module—Valves and Other Hydraulic Components....811
Ref. 251-20-150, Forward/Reverse Module—Hydraulic Circuit Schematic....814
Ref. 251-20-160, Forward/Reverse Module—Description of Various Valves and Components....816
Ref. 251-20-170, Forward/Reverse Module—Pressure Regulating Valve and Filter Relief Valve Operation....819
Ref. 251-20-180, Forward/Reverse Module—Forward/Reverse Modulation Operation....824
Ref. 251-20-190, Forward/Reverse Module—Clutch Pedal Valve Operation....833
Ref. 251-20-200, Forward/Reverse Module—Engagement Override Valve Operation....835
Ref. 251-20-210, Forward/Reverse Module - Cooling System Operation....837
Section 255: PowrQuad Transmissions....842
Group 05: Preliminary Tests....842
Ref. 250-05-001, Hydraulic System and Transmission Diagnostics Preliminary Tests....849
Group 10: Function Test....842
Ref. 255-10-001, PowrQuad Transmission—Function Test....860
Group 15: Tests and Adjustments....842
Ref. 255-15-001, PowrQuad Transmission—System Test....874
Ref. 255-15-002, PowrQuad Transmission—Test Ports....882
Ref. 255-15-003, PowrQuad Transmission—Cooler Flow Rate Test.....884
Ref. 255-15-004, PowrQuad Transmission—System Pressure Test.....885
Ref. 255-15-005, PowrQuad Transmission—Lube Oil Pressure Test.....886
Ref. 255-15-006, PowrQuad Transmission—Lube Oil Pressure Test (Forward Clutch).....887
Ref. 255-15-007, PowrQuad Transmission—Lube Oil Pressure Test (Reverse Clutch).....888
Ref. 255-15-008, PowrQuad Transmission—Forward Clutch Pressure Test....889
Ref. 255-15-009, PowrQuad Transmission—Reverse Brake Pressure Test.....890
Ref. 255-15-010, PowrQuad Transmission—B1 Brake Pressure Test.....891
Ref. 255-15-011, PowrQuad Transmission—B2 Brake Pressure Test.....892
Ref. 255-15-012, PowrQuad Transmission—B3 Brake Pressure Test.....893
Ref. 255-15-013, PowrQuad Transmission—C4 Clutch Pressure Test.....894
Ref. 255-15-014, PowrQuad Transmission—System Pressure Adjustment.....895
Ref. 255-15-015, PowrQuad Transmission—Test Results Table.....897
Ref. 255-15-016, PowrQuad Transmission—Forward/Reverse Lever Linkage Adjustment....899
Ref. 255-15-017, PowrQuad Transmission—Shift and Park Lock Linkage Adjustment....900
Group 20: Operation....842
Ref. 255-20-001, PowrQuad Transmission—Summary of References....903
Ref. 255-20-050, PowrQuad-Plus Transmission—Layout....905
Ref. 255-20-100, PowrQuad Module—Layout....906
Ref. 255-20-110, PowrQuad Transmission Module—Table of Actuated Components....908
Ref. 255-20-120, PowrQuad Transmission Module—Air Pump....909
Ref. 255-20-130, PowrQuad Transmission Module—Transmission Oil Pump....911
Ref. 255-20-140, PowrQuad Transmission Module—Pressure Regulating Valve and Filter Relief Valve....913
255-20-150, PowrQuad Transmission Module—Centrifugal Force Valve and Anticavitation Check Valve....918
Ref. 255-20-160, PowrQuad Transmission Module—Clutch Cooling Components....919
Ref. 255-20-170, PowrQuad Transmission Module—Clutch Cooling Valve (Forward/Reverse)....920
Ref. 255-20-180, PowrQuad Transmission Module—System 1 and System 2 Oil....921
Ref. 255-20-190, PowrQuad Transmission Module—Hydraulic Schematic, Mechanically Actuated PowrQuad Module....922
Ref. 255-20-200, PowrQuad Transmission Module—Forward/Reverse Modulation and Mechanically Actuated PowrQuad Module Operation....924
Ref. 255-20-210, PowrQuad Module—Start Safety Circuit, Mechanically Actuated PowrQuad Module....928
Ref. 255-20-220, PowrQuad Module—Shift Modulation and Mechanically Actuated PowrQuad Module Operation....929
Ref. 255-20-260, PowrQuad Module—Forward/Reverse Lever and Gear Shift Lever, Mechanically Actuated PowrQuad Module Operation....932
Ref. 255-20-530, Range Box—Layout....934
Ref. 255-20-720, Creeper — Operation....936
Section 256: Drive Systems....938
Group 10: Function Tests....938
Ref. 256-10-001, Drive Systems—System Test.....942
Group 15: Tests and Adjustments....938
Ref. 256-15-001, Drive Systems—System Test.....949
Ref. 256-15-002, MFWD Clutch Pressure Test.....953
Ref. 256-15-003, Differential Hydraulic Lock Pressure Test.....954
Ref. 256-15-004, Rear PTO Pressure Test.....955
Ref. 256-15-006, Drive Systems—Test Result Table....958
Group 20: Operation....938
Ref. 256-20-001, Drive Systems—Summary of References....961
Ref. 256-20-001, Drive Systems—Summary of References....961
Ref. 256-20-130, MFWD Clutch—Layout....962
Ref. 256-20-140, MFWD Clutch—Oil Circulation and Power Flow....964
Ref. 256-20-210, Differential—Layout....968
Ref. 256-20-220, Differential—Power Flow....970
Ref. 256-20-230, Differential—Oil Circulation....972
Ref. 256-20-310, Final Drive—Operation and Layout....975
Ref. 256-20-400, Rear PTO Options—Description....976
Ref. 256-20-410, Rear PTO Options—PTO Modulator Valve and Solenoid....978
Ref. 256-20-420, Rear PTO Options—PTO Clutch and Brake....980
Ref. 256-20-430, Rear PTO Options—Lube Cutoff Valve....982
Ref. 256-20-440, Rear Power Take-Off Options - Power Flow....984
Section 260: Steering and Brakes....986
Group 10: Function Test....986
Ref. 260-10-001, Safety Precautions....988
Ref. 260-10-010, Steering Test....989
Ref. 260-10-020, Brake Test....990
Group 15: Tests and Adjustments....986
Ref. 260-15-001, Tests and Adjustments—Summary of References....992
Ref. 260-15-010, Special Tools....1199
Ref. 260-15-020, Connecting SensoControl Test Equipment....996
Ref. 260-15-030, Specified Values....997
Ref. 260-15-040, Steering Valve Leaf Spring Test....998
Ref. 260-15-050, Brake System Test....1001
Ref. 260-15-060, Bleed Brakes (Brake Valve, Power Brakes, MFWD and Disk Brakes)....1002
Ref. 260-15-070, Adjust Brake Pedals and Switches....1004
Group 20: Operation....986
Ref. 260-20-001, Operation—Summary of References....1007
Ref. 260-20-010, Steering Valve Description - Operation....1008
Ref. 260-20-020, Brake Valve (Power Brakes) - Operation....1016
Ref. 260-20-030, Brake Valve (MFWD and Disk Brake) - Operation....1034
Ref. 260-20-040, Rear Brake Operation....1052
Section 270: Hydraulic System....1053
Group 10: Function Tests....1053
Hydraulic System — Function Test, Summary of References....1057
Hydraulic System - Load Check....1058
Hydraulic System - External Control of Hitch, Operational Check-Out....1059
Hydraulic System - Selective Control Valves (M-SCV), Function Test....1060
Group 15: Tests and Adjustments....1053
Hydraulic System - Tests and Adjustments, Summary of References....1064
Hydraulic System - Special Tools, Summary of References....1065
Hydraulic System - Safety Measures for Hydraulic Checks....1066
PFC Hydraulic System - Hydraulic System Diagnostics Work Sheet....1068
Hydraulic System - Heating Up Hydraulic Oil....1070
PFC Hydraulic System - Oil Pressure Test Ports....1071
PFC Hydraulic System - Checking and Adjusting the Maximum Load Sense Pressure....1073
PFC Hydraulic System - Checking and Adjusting the System Pressure....1075
PFC Hydraulic System - Dynamic Test and Adjustment of Differential Pressure....1078
PFC Hydraulic System - Priority Circuit 1, Checking and Adjusting the Load Sense Oil Pressure for Steering....1081
PFC Hydraulic System - Check and Adjust Oil Pressure, Priority Circuit 3....1083
PFC Hydraulic System - Check and Adjust Hydraulic Pump Flow....1085
PFC Hydraulic System - Check Charge Pump Flow....1087
PFC Hydraulic System - Checking the Charge and Lube Oil Pressure....1089
Hydraulic System - Selective Control Valves (M-SCV 300), Adjusting the Automatic Release of Detent....1090
Hydraulic System - Selective Control Valves (SCV), Checking the Couplers for Leaks....1092
Hydraulic System - Checking the Hitch Valve and the Stepper Motor....1093
Hydraulic System - Hitch Valve, Centering the Stepper Motor....1095
Hydraulic System - Hitch Valve, Checking for Leaks....1096
Hydraulic System - Hitch Valve, Rough Adjustment of the Raise and Lower Valves....1097
Hydraulic System - Hitch Valve, Checking the Position Sensor....1099
PFC Hydraulic System - Hitch Valve, Check and Adjust Draft Sensors....1100
Group 20: Operation....1053
Hydraulic System — Operation, Summary of References....1103
Hydraulic System - Summary of Abbreviations....1104
PFC Hydraulic System - Summary of Components....1105
PFC Hydraulic System - Hydraulic and Functional Schematic....1107
PFC Hydraulic System - Lube and Charge Oil Circuit - Hydraulic and Functional Schematic....1112
PFC Hydraulic System - Priority Circuit 1 - Hydraulic and Functional Schematic....1115
PFC Hydraulic System - Priority Circuit 3 - Hydraulic and Functional Schematic....1120
Group 20A: Oil Filter, Charge Pump and Hydraulic Pump....1054
Hydraulic System - Oil Filter, Charge Pump and Hydraulic Pump, Summary of References....1124
Hydraulic System - Hydraulic Oil Filter, Operation....1125
PFC Hydraulic System - Charge Pump - Operation....1127
PFC Hydraulic System - Hydraulic Pump, Operation....1129
PFC Hydraulic System - Hydraulic Pump, Operating Modes....1133
Hydraulic System - Hydraulic Oil Filter, Component Information....1141
Hydraulic System - Hydraulic Oil Filter - Component Information....1142
PFC Hydraulic System - Charge Pump - Component Information....1144
PFC Hydraulic System - Hydraulic Pump - Component Information....1146
Group 20B: Hitch....1054
Hitch - Summary of References....1149
Hitch - Summary of Components....1150
Hitch - Hitch Control Operation....1152
Hitch - Hitch Valve, Operation....1154
Hitch - Position Sensor, Operation....1156
Hitch - Load Sensor Operation....1157
Hitch - Direct Control....1158
Hitch - Controls....1159
Group 20C: Selective Control Valves (SCV)....1054
Selective Control Valves (SCV) - Summary of References....1162
Selective Control Valve (M-SCV 100) - Operation....1163
Selective Control Valve (M-SCV 300) - Operation....1171
Group 20E: Hydraulic Block....1054
Hydraulic System - Hydraulic Hitch, Summary of References....1180
PFC Hydraulic System - Hydraulic Block, Summary of Components....1181
PFC Hydraulic System - Priority 1 Control Block, Component Information....1183
PFC Hydraulic System - Control Block (Without Priority 2), Component Information....1185
PFC Hydraulic System - Priority 3 Control Block, Component Information....1187
Section 290: Operator's Cab....1189
Group 15: Tests and Adjustments....1189
Operational Checkout (Summary of References)....1191
Safety in the Workplace....1192
Handling Refrigerant....1193
Safety Equipment....1194
In the Event of an Emergency....1195
Storage of Refrigerant Containers....1196
Refrigerant R134a....1221
Important....1198
Special Tools....1199
Specification....1201
Explanation Of Checks....1202
Pressure Deviations....1216
Group 20: Operation....1189
Operation of Air Conditioning/Heating/Ventilation—Summary of References....1219
Principle of Heat Exchange....1220
Refrigerant R134a....1221
Refrigerant Circuit Layout (Cab Tractors)....1222
Refrigerant Circuit Operation....1223
Component Description....1226
Expansion Valve....1230
Thermostat Switch....1232
Heating and Ventilation....1233
Section 299: Special Tools (Dealer-Fabricated)....1235
Group 05: Special Tools (Dealer-Fabricated)....1235
Special Tools (Dealer-Fabricated) — Summary....1237
Retainer Tool....1238
Adjustment Tool....1239
DFRW2—Needle Valve Test Hose Assembly....1240
DFLX10 and DFLX11—Test Harnesses....1241
DFLX12—Special Tool for 11-bit and 29-bit CAN BUS....1243
DFLX14—Solenoid Valve Test Harness....1244
Group 10: Special Tools (Available as Spare Parts)....1235
AR52361 - Socket....1246
D01019AA - Single-Stage, Manually Operated Pump....1247
D05104ST - Pump....1248
FKM10002 / JT05470 - Universal Pressure Test Kit....1249
FKM10242 - Pressure Gauge....1250
FKM10470 - Pressure Measuring System (Stage 1)....1251
FKM10471 - Pressure Measuring System (Stage 2)....1252
FKM10472 - Flow Measurement System....1253
FKM10472-4 - Temperature Sensor....1254
JDG839 - Adapter....1255
JDH43A - Tester for Pressure-Relief Valves....1256
JT03248 - Fitting....1257
JT05470 / FKM10002 - Universal Pressure Test Kit....1258
JT05719 - Hand-Held Digital Tachometer....1259
JT05791A or JDG1478 - Analog/Digital Multimeter....1260
JT05800 - Digital Thermometer....1261
JT07115 - Pressure Test Kit....1262
JT07120 - Adjustable Restrictor....1263
KJD10128 - Fitting....1264
KJD10352 - Adapter....1265
John Deere 7425, 7525, 6140J, 6155J, 6155JH Tractors Diagnosis and Tests Service Technical Manual (TM605919)
