John Deere 6820, 6920, 6920S Tractors Repair Technical Manual (TM4756)
Catalog:
Model:
For complete service information also see:
Tractors 6020 to 6920S Operation and Tests . . TM4741
Tractors 6020 to 6920S Diagnostics . . TM4726
Front Wheel Drive Axles . . CTM4687
POWERTECH Diesel Engines . . CTM104
Mechanical Fuel Injection Systems . . CTM207
Electronic Fuel Injection Systems . . CTM170
Alternators and starter motors . . CTM77
Complete Technical Manual (Repair) for John Deere 6820, 6920, 6920S Tractors. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.
John Deere 6820, 6920, 6920S Tractors Technical Manual (Repair) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.
TM4756 - John Deere 6820, 6920, 6920S Tractors Technical Manual (Repair).pdf
TM4756 - John Deere 6820, 6920, 6920S Tractors Technical Manual (Repair).epub
TABLE OF CONTENTS
SECTION 05—Safety
Group 05—Safety information
SECTION 56—Transmission (without gear)
Group 00—Installing and removing components
Group 05—U.J. Shaft and torsion damper
Group 10—FWD clutch
Group 15—Differential
Group 20—Hydraulic pump drive
Group 25—Final drives
Group 30—Rear PTO
SECTION 10—General information
Group 05—Specifications
Group 10—Tune-up
Group 15—Inspection before delivery
SECTION 20—Engine
Group 00—Installing and removing components
SECTION 60—Steering and brakes
Group 05—Hydrostatic steering
Group 10—Brake valve
Group 15—Rear wheel brakes
Group 20—Handbrake
Group 25—Hydraulic trailer brakes
Group 30—Air brake system
SECTION 30—Fuel, air intake, heating, exhaust system
Group 05—Speed control
Group 10—Fuel system
Group 15—Air intake system
Group 20—Heating system
Group 25—Cold-weather starting aid
Group 30—Exhaust system
SECTION 70—Hydraulic system
Group 05—Control elements
Group 10—Hydraulic pump and charge oil pump
Group 15—Valves
Group 20—Rockshaft
Group 25—Additional control units and reception couplings
Group 30—Indepent additional control unit
SECTION 40—Electrical equipment
Group 05—Electrical connectors
Group 10—Wiring harnesses
Group 15—Charging current circuit
Group 20—Starting current circuit
Group 25—Fuses, relays and connectors
Group 30—Monitoring systems
Group 40—Electrical components
SECTION 80—Miscellaneous
Group 00—Installing and removing components
Group 05—Main frame
Group 10—Front and rear wheels
Group 15—Trailer support and counterweight pendant
Group 20—Axle suspension of TLS front wheel drive axle
Group 25—Hydraulic wagon hitch
SECTION 53—AutoPowr/IVT transmission
Group 00—Removing and installing the AutoPowr/IVT transmission
Group 05—Transmission shifting mechanisms
Group 10—Input housing
Group 15—Output housing
Group 20—Assembling the intermediate shaft
SECTION 90—Operator’s cab
Group 00—Installing and removing components
Group 05—Controls and instruments
Group 10—Air-conditioning system
Group 15—Heating system
Group 20—Seats
SECTION 55—PowrQuad, PowrQuad Plus and AutoQuad transmission
Group 00—Installing and removing components
Group 05—Transmission shifting mechanisms
Group 10—PowrQuad module
Group 15—Creeper transmission
Group 20—Range transmission
Continued on next page
Group 25—Operator’s cab
Group 30—Components of the electronic hitch control
SECTION 99—Special tools (dealer- fabricated)
Group 05—Special tools (dealer- fabricated)
...
Contents....3
Safety....5
Safety information....7
Recognize Safety Information....7
"Important" - Information....7
"Note" - Information....7
Prevent Machine Runaway....7
Handle Fluids Safely—Avoid Fires....8
Prevent Battery Explosions....8
Prepare for Emergencies....8
Prevent Acid Burns....9
Avoid High-Pressure Fluids....10
Service Cooling System Safely....10
Remove Paint Before Welding or Heating....11
Avoid Heating Near Pressurized Fluid Lines....11
Work In Ventilated Area....12
Wear Protective Clothing....12
Practice Safe Maintenance....13
Park Machine Safely....13
Use Proper Lifting Equipment....14
Construct Dealer-Made Tools Safely....14
Support Machine Properly....14
Work in Clean Area....15
Illuminate Work Area Safely....15
Service Machines Safely....15
Use Proper Tools....16
Service Tires Safely....16
Service Front-Wheel Drive Tractor Safely....17
Working on the Air Brake System....17
Avoid Eye Contact With Radar....18
Keep ROPS Installed Properly....18
Replace Safety Signs....18
Dispose of Waste Properly....19
Live With Safety....19
Safety Measures for Electronic Control Units....20
General information....21
Specifications....23
Technical data (summary of references)....23
Engine specifications....24
Cooling circuit....25
Injection pump (Bosch VP44)....25
Air Intake System....25
Electrical system....25
Hydrostatic Steering System....26
Clutch....26
AutoPowr/IVT transmission....26
PowrQuad Plus transmission....27
AutoQuad II transmission....27
Creeper transmission....27
Rear PTO....28
Front PTO....28
Differential assembly....28
Differential lock....28
Final drives....29
Front Wheel Drive....29
FWD Axle with TLS....29
Hydraulic Brakes....29
Handbrake....30
Parking Lock....30
Hydraulic System with Axial Piston Pump....30
Rockshaft....30
Front Hitch....31
Ground Speeds....31
Front and Rear Wheels....31
Dimensions and Weights....31
Capacity specifications....32
Handling and Storing Diesel Fuel....33
Diesel Fuel....34
Lubricity of Diesel Fuel....35
Diesel Engine Break-In Oil....35
Diesel Engine Oil....36
Transmission and Hydraulic Oil....37
Front Wheel Drive Axle Oil....38
Diesel Engine Coolant....39
Supplemental Coolant Additives....40
Grease....41
Oil Filters....41
Mixing of Lubricants....42
Lubricant Storage....42
Operating in Warm Temperature Climates....43
Alternative and Synthetic Lubricants....43
Unified Inch Bolt and Cap Screw Torque Values....44
Metric Bolt and Cap Screw Torque Values....45
Hydraulic system inch fitting torques....46
Hydraulic system metric fitting torques....47
Product identification and component serial numbers....48
Engine serial number....49
Transmission serial number....49
Front wheel drive axle serial number....49
Operator's cab serial number....49
Sub-assembly serial numbers....50
Tune-up....51
Tune-up (summary of references)....51
Repair specifications....51
Using High-Pressure Washers....52
Preliminary engine test....52
Tractor tune-up....53
Removing and Cleaning the Primary Air Cleaner Element....54
Checking the Air Cleaner Safety Element....54
Installing the Primary Filter Element....54
Checking the Air Intake System Connections for Leaks....55
Checking the Crankcase Vent Hose for Clogging....55
Cleaning the Radiator Grille Screen....55
Keeping the Radiator Screen Clean....55
Checking the Caps on the Expansion Tank ....56
Checking the Radiator for Leaks....56
Checking the engine's thermostat....56
Checking the fuel transfer pump operation....57
Bleeding the Fuel System (Tractors Equipped with Bosch VP44 Injection Pump)....58
Checking the fuel filter (with Bosch VP44 injection pump)....61
Cleaning the water trap....61
Run the engine until it is warm, and check engine speeds ....62
Check setting of fuel injection pump....62
Cleaning the Battery, Cables and Battery Box with a Clean Cloth ....63
Checking the neutral start circuit....63
Checking operation of starter motor....64
Checking the lighting circuit....64
Final Engine Check....64
Tractor Operation Check....65
Inspection before delivery....67
Predelivery Inspection....67
Engine....69
Installing and removing components....71
Special tools....71
Repair specifications....72
Removing the engine....72
Installing the engine....81
Fuel, air intake, heating, exhaust system....89
Speed control....91
Speed control linkage (summary of references)....91
General Information....91
Specifications....91
Adjusting the Hand Throttle Lever and Accelerator Pedal....92
Adjusting the Speed Control Linkage....92
Hand Throttle Lever—Exploded View....93
Accelerator Pedal, with Mechanical Speed Control....94
Accelerator Pedal, With Electronic Speed Control ("Cruise Control")....96
Adjusting the accelerator pedal (6920S)....98
Changing the accelerator pedal potentiometer....98
Replacing the Accelerator Pedal Assembly (AutoPowr/IVT)....99
Removing the Accelerator Pedal's Potentiometer....99
Removing the Hand Throttle's Potentiometer....101
Fuel system....103
Summary of references (fuel system)....103
General Information....103
Removing the Fuel Tank....103
Installing the Fuel Tank....104
Replacing the fuel gauge sender....105
Replacing the fuel transfer pump....105
Changing the Fuel Filter....106
Bleeding Air from the Fuel System (with Bosch VP44 Injection Pump)....106
Installing Check Valve in Fuel System....107
Air intake system....109
General Information....109
Air filter - Exploded view....109
Replacing the Sending Unit for Air Cleaner Restriction (B02)....110
Heating system....111
Cooling system (summary of references)....111
General Information....111
Repair specifications....111
Removing the radiator....112
Changing the Fan or the Viscous Fan Drive....116
Removing and Installing the Expansion Tank....117
Removing and installing the thermostat valve....117
Installing the radiator....118
Relieving Tension on the Drive Belt....120
Replacing the Drive Belt....120
Replacing the Drive Belt Tensioner....122
Repairing the Fan Console....123
Cold-weather starting aid....125
Cold-weather starting aids (summary of references)....125
Fuel Preheater....125
Electrical Starting Aid....126
Coolant Heater....127
Exhaust system....129
Exhaust system (summary of references)....129
General Information....129
Repair specifications....129
Exhaust system to top right....130
Electrical equipment....135
Electrical connectors....139
Special or Essential Tools....139
General....141
Using high-pressure washers....141
Disconnecting electrical circuits....142
Stripping Wire Ends....143
Installing a terminal....144
WEATHER PACK Connectors....146
METRI PACK connector with terminal lock at the rear....147
METRI PACK connector with terminal lock at the front....150
METRI PACK connector....152
Connectors for electronic control units....156
Connector for injection pump....160
Connector at CAN bus terminating resistor....162
CRIMP SNAP IN connectors....164
Connectors....166
Blade Terminals....174
CPC Connectors....176
KOSTAL connectors....178
DEUTSCH Connectors....180
Changing terminals....182
Relay socket....184
Fuse and Relay Boxes....186
Wiring harnesses....189
Wiring harnesses — Repairing (summary of references)....189
Disconnecting electrical circuits....190
Ground Point Locations....191
Removing and Installing Harness W01 — Power Supply....192
Removing and Installing Harness W02 — 6-Cylinder Engine, Level 4....194
Removing and Installing Harness W03 — Starting Aid, Level 4....196
Removing and Installing Harness W04 — Headlights....197
Removing and Installing Harness W05 — Front Corner Worklights....198
Removing and Installing Harness W06 — Front-Wheel Drive Axle with TLS....199
Removing and Installing Harness W07 — Front PTO....200
Removing and Installing Harness W08 — Cab....202
Removing and Installing Harness W08 — Cab (AutoPowr/IVT Transmission)....204
Removing and Installing Harness W09 — Cowl....206
Removing and Installing Harness W09 — Cowl (AutoPowr/IVT Transmission)....208
Removing and Installing Harness W10 — Shift Console....210
Removing and Installing Harness W11 — Transmission Shift and Hand Throttle....211
Removing and Installing Harness W11 — Speed Control Lever and Hand Throttle (AutoPowr/IVT Transmission)....212
Removing and Installing Harness W12 — Command Arm (AutoPowr/IVT Transmission)....214
Removing and Installing Harness W13 — Clutch Sender....216
Removing and Installing Harness W14 — 3-Terminal Power Outlet Socket....217
Removing and Installing Harness W15 — Engine Control Unit (ECU) (Level 4)....218
Removing and Installing Harness W16 — E-SCV / E-ICV Controller (SIC)....219
Removing and Installing Harness W17 — Multifunction Unit....220
Removing and Installing Harness W18 — Windshield Wiper Switch (Without Intermittent Wipe)....221
Removing and Installing Harness W18 — Windshield Wiper Switch (With Intermittent Wipe)....222
Removing and Installing Harness W19 — Cab Roof....224
Removing and Installing Harness W20 — L.h. Turn Signal and Clearance Lights, with Light on L.h. Side of Cab Frame....226
Removing and Installing Harness W20 — R.h. Turn Signal and Clearance Lights, with Light on R.h. Side of Cab Frame....227
Removing and Installing Harness W20 — L.h. Turn Signal and Clearance Lights, with Worklight on L.h. Side of Cab Frame....228
Removing and Installing Harness W20 — R.h. Turn Signal and Clearance Lights, with Worklight on R.h. Side of Cab Frame....229
Removing and Installing Harness W21 — Worklights on Front of Cab Roof....230
Removing and Installing Harness W22 — Worklights on Rear of Cab Roof....231
Removing and Installing Harness W23 — Windshield Wiper Switch (Without Switch for Windshield)....232
Removing and Installing Harness W23 — Windshield Wiper (With Switch for Windshield)....234
Removing and Installing Harness W24 — Rear Window Wiper....236
Removing and Installing Harness W25 — Rear Window Wiper Switch....237
Removing and Installing Harness W26 — Fan and Air Conditioner....238
Removing and Installing Harness W28 — Front End of Transmission....240
Removing and Installing Harness W28 — Front End of Transmission (AutoPowr/IVT Transmission)....242
Removing and Installing Harness W29 — Valve Block (AutoPowr/IVT Transmission)....244
Removing and installing harness W30 — Rear end of transmission....245
Removing and installing harness W30 — Rear end of transmission with E-SCV / E-ICV....248
Removing and Installing Harness W31 — 7-Terminal Power Outlet Socket....250
Removing and Installing Harness W32 — Stepper Motors....251
Removing and Installing Harness W33 — Service....252
Charging current circuit....253
Specifications....253
Repairing the Alternator....253
Disconnecting Electrical Circuits....253
Relieving the Drive Belt....254
Remove/Install the Alternator....255
Starting current circuit....257
Special tools....257
Specifications....257
Repairing the Starting Motor....257
Disconnecting Electrical Circuits....258
Removing and installing the starter motor....258
Fuses, relays and connectors....259
Note....259
Special or Essential Tools....259
Repair specifications....260
Fuses, relays and switches — Repairing (summary of references)....261
Disconnecting electrical circuits....261
Fuse and Relay Boxes on Tractors with Operator's Cab....262
Fuse and Relay Boxes on Tractors with Operator's Cab and AutoPowr/IVT Transmission....273
Replacing the main fuses....284
Replacing the Fuses at the Electrical Starting Aid, Tractors with Level 4 Engine Control Unit (ECU)....285
Replacing the Injection Pump Fuse, Tractors with Level 4 Engine Control Unit (ECU)....286
Replacing the Starting Motor Relay, Tractors with Level 4 Engine Control Unit (ECU)....287
Replacing the Relay for the Electrical Starting Aid, Tractors with Level 4 Engine Control Unit (ECU)....288
Replacing the Injection Pump Relay, Tractors with Level 4 Engine Control Unit (ECU)....289
Replacing the Main Switch....290
Replacing the Brake Switches....290
Replacing the Light Switch....291
Replacing the Worklight Switches....291
Replacing the Switch for Lights on Cab Frame....292
Replacing the Beacon Light Switch....292
Replacing the Hazard Warning Light Switch....293
Replacing Switches on Multi-Function Unit....294
Replacing the Rear Window Wiper and Washer Switch....297
Replacing the Windshield/Rear Window Switches....298
Replacing the Dome Light Door Switch....299
Replacing the Handbrake Switch....300
Replacing the Front-Wheel Drive Switch....301
Replacing the Headland Management (HMS) Switch....302
Replacing the Record/Save Switch....303
Replacing the Program Switch....304
Replacing the Rear PTO Preselector Switch....306
Replacing the Switch for AutoQuad Transmission....307
Replacing the Gear Selector Switch on Tractors with PowrQuad Plus and AutoQuad Transmissions....308
Replacing the Park Lock Switch on Tractors with PowrQuad Plus and AutoQuad Transmissions....310
Replacing the Fan Switch....311
Replacing the Switch of the Air-Conditioning System Compressor....312
Replacing the Differential Lock Switch....313
Replacing the PTO Switch....314
Replacing the External Control Switch for the Rear PTO....317
Replacing the Rockshaft's Remote Control Switch....318
Replacing the Switch for the Electrical Rear-View Mirror....319
Replacing the Switch for the Heated Rear-View Mirror....319
Replacing the Switch for the Heated Rear Window....320
Replacing the Cruise Control Potentiometer on Tractors with AutoQuad Transmission....321
Replacing the Cruise Control Potentiometer on Tractors with AutoPowr/IVT Transmission....322
Rockshaft Control....323
Electrical Activators for Selective Control Valves (E-SCV)....329
Electrical Activators for Independent Control Valves (E-ICV)....332
Monitoring systems....337
Note....337
Note....337
Monitoring systems — Repairing (summary of references)....338
Disconnecting electrical circuits....338
Replacing the sender for the coolant temperature gauge (B08)....339
Replacing the Wheel Speed Sending Unit (B09)....340
Replacing the Sending Unit for Transmission Output Speed (B84) on Tractors with AutoPowr/IVT Transmission....341
Replacing the Acoustic Alarm....342
Replacing the Acoustic Alarm (Park Lock) on Tractors with AutoPowr/IVT Transmission....343
Electrical components....345
Note....345
Specifications....345
Electrical Components — Reconditioning (Summary of References)....346
Disconnecting electrical circuits....346
Replacing the 7-Terminal Power Outlet Socket....347
Replacing the 3-Terminal Power Outlet Socket....348
Replacing the Multiple Power-Outlet Socket Strip....349
Replacing the Service Socket....350
Removing the Wiper Motor....351
Adjusting the Headlights....352
Adjusting the Lights on the Cab Frame....353
Lights with Halogen Bulbs....354
Worklights with Xenon Bulbs....355
AutoPowr/IVT transmission....357
Removing and installing the AutoPowr/IVT transmission....359
Special tools....359
Dealer-fabricated special tools....359
Repair specifications....360
Removing the AutoPowr/IVT transmission....361
Installing the AutoPowr/IVT transmission....365
Transmission shifting mechanisms....371
AutoPowr/IVT Transmission Shift Units—Reconditioning (Summary of References)....371
Reconditioning the Speed Control Lever....371
Reconditioning the Reverser Control....380
Repairing the clutch actuation mechanism....384
Reconditioning the Manual Park Lock Release Mechanism....388
Releasing the Park Lock Manually....390
Input housing....393
Special tools....393
Repair specifications....394
AutoPowr/IVT transmission, input housing — Repairing (summary of references)....396
Installing and removing the vibration damper....396
Removing the clutch control block....397
Repairing the clutch control block....399
Installing the clutch control block....405
Removing and installing the transmission oil filter....406
Removing the system pressure control block....408
Repairing the system pressure control block....410
Installing the system pressure control block....414
Removing the transmission oil pump....416
Repairing the transmission oil pump....418
Installing the transmission oil pump....421
Removing and installing the front plate....423
Replacing the hydrostatic speed sender (B62)....426
Output housing....427
Special tools....427
Repair specifications....428
AutoPowr/IVT transmission, output housing — Repairing (summary of references)....429
Removing park lock control block....429
Repairing the park lock control block....430
Installing the park lock control block....442
Repairing the locking pawl of the park lock....443
Replacing the transmission speed sender (B63)....447
Replacing the transmission input speed sender (B61)....448
Replacing the transmission output sender (B84)....449
Assembling the intermediate shaft....451
Specifications....451
Repairing the intermediate shaft....452
PowrQuad, PowrQuad Plus and AutoQuad transmission....463
Installing and removing components....465
Special tools....465
Dealer-fabricated special tools....465
Repair specifications....467
PowrQuad Plus Transmission, Removal and Installation....467
AutoQuad Transmission, Removal and Installation....468
Removing the PowrQuad transmission....468
Installing the PowrQuad transmission....471
Removing the creeper transmission....472
Installing the Creeper Transmission....473
Removing the range transmission....474
Installing the range transmission....476
Transmission shifting mechanisms....477
Repair specifications....477
PowrQuad transmission shift controls — Repairing (summary of references)....477
Repairing the range shift linkage (PowrQuad Plus and AutoQuad transmissions)....478
Checking and adjusting the shift units (PowrQuad Plus and AutoQuad transmission)....482
Repairing the clutch actuation mechanism (PowrQuad Plus and AutoQuad transmissions)....484
PowrQuad module....489
Special tools....489
Repair specifications....490
PowrQuad, PowrQuad Plus and AutoQuad Transmissions—Summary of References....492
Transmission Components....493
Replacing the temperature sensor and pressure switches....494
Removing and Installing the Oil Filter Housing....495
Removing and Installing the Front Valve Housing....496
Removing and installing the valves in the front valve housing....497
Removing and installing the front transmission cover....501
Valves in front transmission cover, removing and installing....502
Removing and Installing the Shift Valve Housing....506
Removing and installing the valves in the shift valve housing....507
Removing the Transmission Oil Pump....509
Repairing the transmission oil pump....510
Installing the Transmission Oil Pump....515
Removing the Gear-Shift Planetary Drive....516
Repairing the gear-shift planetary drive....517
Installing the gear-shift planetary drive....521
Removing the B1 Brake Housing....525
Reconditioning the B1 Brake....526
Installing the B1 Brake Housing....528
Removing the B2-B3 Brake Housing....529
Reconditioning the B2 Brake....530
Reconditioning the B3 Brake....532
Installing the B2-B3 Brake Housing....534
Removing the C4 Clutch....535
Repairing the C4 clutch....536
Installing the C4 Clutch....540
Removing the reverse brake....541
Repairing the reverse brake....542
Installing the reverse brake....545
Removing the Forward Clutch with Planetary Drive (Forward/Reverse)....546
Repairing the forward clutch with planetary drive (forward/reverse)....547
Installing the Forward Clutch with Planetary Drive (Forward/Reverse)....553
Replacing the output shaft....554
Creeper transmission....557
Special tools....557
Repair specifications....557
Creeper transmission — Repairing (summary of references) ....558
Removing the creeper transmission....558
Repairing the creeper transmission....559
Installing the creeper transmission....570
Range transmission....573
Special tools....573
Repair specifications....574
Range transmission — Repairing (summary of references) ....575
Removing the range transmission....575
Range transmission — Sectional view....576
Repairing the range transmission....577
Installing the range transmission....594
Repairing the shift cover....595
Replacing the speed sender....597
Transmission (without gear)....599
Installing and removing components....601
Special tools....601
Dealer-fabricated special tools....603
Repair specifications....605
Removing the FWD clutch....605
Installing the FWD clutch....606
Removing the differential housing....607
Installing the differential housing....613
Removing the final drives....617
Installing the final drives....620
Removing the rear PTO....623
Installing the rear PTO....625
Removing the front PTO....626
Installing the Front PTO....627
U.J. Shaft and torsion damper....629
Summary of references (u.j. shafts and torsion damper) ....629
Repair specifications....629
Removing the U.j. Shaft (FWD)....630
Reconditioning the U.j. Shaft (FWD)....631
Installing the U.j. Shaft (FWD)....633
Removing the U.j. Shaft (Engine)....634
Removing and Installing the Ring-Shaped Cooler....635
Removing the Torsion Damper....637
Changing the Torsion Damper Bearings....637
Installing the Torsion Damper....638
Installing the U.j. Shaft (Engine)....638
FWD clutch....639
FWD clutch — Repairing (summary of references) ....639
Special tools....639
Other material....640
Repair specifications....640
Front-wheel drive clutch — Sectional view....641
FWD clutch — Exploded view....642
FWD clutch — Replacing speed sensor....644
FWD clutch — Replacing solenoid valve....645
Replacing the FWD clutch....646
Differential....659
Differential — Reconditioning (Summary of References) ....659
Special tools....659
Specifications....660
Removing the differential....661
Disassembling the differential....663
Differential — Exploded view....667
Assembling the differential....668
Installing the differential....670
Hydraulic pump drive....675
Special tools....675
Repair specifications....675
Remove and Disassemble Pump Drive Pinion Gear....676
Removing and disassembling the pump drive gear....678
Assembling and installing pump drive gear....679
Assembling and installing the pump drive pinion....682
Checking and adjusting the backlash of the pump drive pinion ....683
Final drives....685
Special tools....685
Other Material....686
Specifications....686
Repair Instructions....687
Removing the planetary carrier....687
Disassemble Planet Pinion Carrier....689
Assemble Planet Pinion Carrier....691
Remove Axle Housing....692
Disassemble and Assemble Axle Housing....693
Disassemble and Assemble Axle Shaft....694
Install Axle Housing....696
Installing the planetary carrier and checking rolling resistance torque....697
Rear PTO....701
Special tools....701
Specifications....702
Repair Instructions....703
Repair Rear PTO....703
Remove and Disassemble Countershaft....713
Assemble and Install Countershaft....716
Remove and Disassemble Output Shaft....719
Assemble and Install PTO Output Shaft....723
Remove PTO Shifter....726
Install PTO Shifter....729
Replacing Oil Seal on PTO Output Shaft....730
Remove Modulating Valve....730
Disassemble and Assemble Modulating Valve....731
Install Modulating Valve....732
Changing and adjusting the bowden cable....733
Steering and brakes....737
Hydrostatic steering....739
Hydrostatic steering (summary of references)....739
Special tools....739
Specifications....741
Preliminary Work....741
Removing steering column and steering valve....742
Disassembling the Steering Valve....747
Exploded View of Steering Valve....750
Assembling the Steering Valve....751
Adjusting the Shock Valves....758
Steering Wheel and Steering Column (With Cab)....759
Reconditioning the Steering Column....760
Installing steering column and steering valve....760
Brake valve....767
Brake Valve with Power-Fill....767
Power-Fill Brake Valve with MFWD and Disk Brake ....784
Rear wheel brakes....805
Specifications....805
Preliminary Work....805
Removing the Rear Brakes....805
Rear Brakes—Exploded View....806
Repairing the Rear Brakes....807
Installing the Rear Brakes....808
Final Assembly....808
Bleeding the brakes (brake valve with Power-Fill brakes, MFWD and disk brake)....809
Handbrake....813
Handbrake (summary of references)....813
Specifications....813
Preliminary work....813
Removing the Handbrake....813
Exploded view of handbrake - Tractor 6820....816
Exploded view of handbrake - Tractors 6920 and 6920S....817
Installing the handbrake....818
Adjusting the Brake Band....820
Final assembly....820
Handbrake components....821
Replacing the handbrake cable....822
Adjusting the Handbrake....823
Hydraulic trailer brakes....825
Hydraulic trailer brake (summary of references)....825
Special or Essential Tools....825
Specifications....826
Repair Instructions....826
Changing the Trailer Brake Valve....826
Cleaning the Trailer Brake Valve....827
Cleaning the Screen....828
Replacing the Check Valve....829
Bleeding the Trailer Brake Valve....829
Checking the Trailer Brake Valve....830
Adjusting the Trailer Brake Valve....832
Air brake system....833
Air brake system (summary of references)....833
Special tools....833
Repair specifications....834
Safety instructions....835
Screw Union Installation....835
Changing the Compressor....836
Gaskets for the Compressor....837
Changing the compressed air tank....838
Changing the preload valve ....839
Changing the pressure-relief valve....839
Changing the pressure-regulating valve....840
Changing the trailer control valve (dual-line + single-line brake)....841
Changing the trailer control valve (single-line brake)....841
Changing the Coupling Ends....844
Changing the Pressure Gauge....845
Test sequence....846
Checking the system for leaks....846
Checking the "Supply" Coupling End....847
Checking the Dual-Line Brakes....848
Checking the Single-Line Brakes....849
Adjusting the air brake system handbrake....850
Hydraulic system....851
Control elements....853
Specifications....853
Selective Control Valves — Removing and Installing the Actuating Elements....854
Selective Control Valves — Adjusting the Bowden Cable....857
Removing and Installing the Multifunction Lever....858
Adjusting the Multifunction Lever....859
Hydraulic pump and charge oil pump....861
Other Material....861
Specifications....861
Removing and installing the charge pump....862
Reconditioning the Charge Pump....863
Charge Pump - Checking the Lube Oil Valve....865
Hydraulic Oil Reservoir — Restrictor....865
Hydraulic Pump — Removing and Installing the Pressure-and-Flow Controller....866
Hydraulic Pump — Reconditioning the Pressure-and-Flow Controller....867
Removing and Installing the Hydraulic Pump....868
Reconditioning the Hydraulic Pump....870
Valves....877
Special or Essential Tools....877
Special Tools (Dealer Fabricated)....877
Specifications....878
Hydraulic System — General Instructions on Safety and Repair....879
Direct Control of Rockshaft....880
Removing the Rockshaft Valve....881
Reconditioning the Rockshaft Valve....882
Rockshaft Valve — Depth to Which Raising and Lowering Valves are Screwed In....886
Rockshaft Valve — Removing and Installing the Stepper Motor....886
Rockshaft Valve — Centering the Stepper Motor....887
Installing the hitch valve....888
Removing the main block....889
Reconditioning the Main Block....890
Installing the main block....892
Reconditioning the Hydraulic Oil Filter....893
Rockshaft....895
Other Material....895
Repair specifications....895
Rockshaft — Removing and Installing the Electronic Control Unit....896
Hitch — Removing and installing the position sensor and toothed segment....896
Hitch — Removing and installing the lift shaft....899
Hitch — Removing the lift shaft cylinders....902
Hitch — Repairing the lift cylinder....902
Hitch — Installing the lift cylinders....904
Hitch — Removing and installing the draft load potentiometer and draft link support....905
Additional control units and reception couplings....909
Special Tools (Dealer Fabricated)....909
Other Material....909
Repair specifications....910
Repairing the selective control valves and couplers — Summary of references....913
Reconditioning the Selective Control Valves and Couplers — General Instructions on Safety and Reconditioning ....914
SCV identification....915
Installing the shuttle valves....916
Removing the Selective Control Valves....918
Series 100 selective control valves — Repairing....920
Series 200/300 selective control valves (mechanically actuated) — Replacing the control knobs....925
Series 200/300 selective control valves (mechanically actuated) — Inspecting the check valves....926
Series 200/300 selective control valves (mechanically actuated) — Inspecting the inlet check valve and metering valve....927
Series 200 selective control valves — Repairing....928
Series 300 selective control valves (mechan actuated) — Inspecting the pressure compensator valve....934
Series 300 selective control valves (mechan actuated) — Repairing....936
Series 300 Selective Control Valves (Electrically Actuated) — Inspecting the Check Valves....944
Series 300 Selective Control Valves (Electrically Actuated) — Inspecting the Inlet Check Valve....944
Series 300 Selective Control Valves (Electrically Actuated) — Inspecting the Pressure Compensator Valve....945
Series 300 Selective Control Valves (Electrically Actuated) — Reconditioning....946
Installing the Selective Control Valves....949
Selective Control Valves — Installing the Endplate....952
Selective Control Valves — Reconditioning the Couplers....955
Indepent additional control unit....959
Other Material....959
Specifications....960
Removing the Independent Control Valve (ICV)....962
Reconditioning the Independent Control Valve....964
Independent Control Valve — Reconditioning the Inlet Plate....977
Assembling the Independent Control Valve....977
Installing the Independent Control Valve....981
Miscellaneous....985
Installing and removing components....987
Special tools....987
Dealer-Fabricated Special Tools....988
Repair specifications....990
Removing and installing the main frame (summary of references)....990
Removing the main frame....991
Installing the main frame....997
Removing and installing the front axle or front-wheel drive axle (summary of references)....999
Removing the front wheel drive axle....999
Installing the front-wheel drive axle....1000
Removing the FWD axle with TLS....1002
Installing the front-wheel drive axle with TLS....1005
Removing and installing the front axle support (summary of references)....1006
Removing the front axle support....1007
Installing the front axle support....1011
Main frame....1013
Repair specifications....1013
Repairing the main frame....1013
Front and rear wheels....1017
Special tools....1017
Repair specifications....1018
Removing the front and rear wheels....1018
Installing the front and rear wheels....1020
Trailer support and counterweight pendant....1023
Trailer mounting and swinging drawbar — Repairing (summary of references)....1023
Repair specifications....1024
Installing trailer mounting for center link....1025
Installing guide rails....1025
Repairing the Automatic Trailer Hitch (One-Lever Operation)....1028
Repairing the Automatic Trailer Hitch (Two-Lever Operation)....1031
Remote control for automatic trailer hitch....1033
Reconditioning the height-adjustable trailer hitch (Italy and Spain only)....1036
Swinging drawbar - Exploded view....1037
Swinging drawbar (with pick-up hitch)....1038
Axle suspension of TLS front wheel drive axle....1039
Triple Link Suspension (TLS) of FWD Axle—Summary of References....1039
Special or Essential Tools....1040
Other material....1042
Repair specifications....1043
Relieving Pressure in the Hydraulic System....1045
Removing/Installing the oscillation limiter....1046
Removing the Panhard link....1047
Installing the Panhard link....1049
Removing and installing the sensor rod....1050
Removing the position sensor....1051
Reconditioning the Position Sensor....1053
Installing the position sensor....1054
Removing hydraulic cylinder....1056
Repairing the hydraulic cylinder....1062
Installing the hydraulic cylinder....1067
Removing the control valve block....1072
Reconditioning the Valves in the Control Valve Block....1074
Installing the Control Valve Block....1081
Removing the Accumulator....1083
Reconditioning the Accumulator....1084
Installing the Accumulator....1085
Removing and repairing the bearing support....1086
Installing the bearing support....1093
Hydraulic wagon hitch....1099
Pick-up hitch—Summary of references....1099
Repair specifications....1099
Other material....1100
Hydr. pick-up hitch—General safety and repair information....1101
Removing and installing pick-up hitch....1101
Control lever and lift links — Exploded view....1103
Frame assembly — Exploded view....1104
Hydraulic Parts....1105
Repairing the retainer spring....1106
Repairing the latch housing....1108
Repairing the hydraulic cylinder....1110
Adjusting the lift links....1113
Adjusting the locking pin....1114
Adjusting the guide stop....1115
Hydr. pick-up hitch—Operational check....1116
Operator's cab....1117
Installing and removing components....1119
Special or Essential Tools....1119
Dealer-Manufactured Special Tools....1121
Repair specifications....1121
Tilting operator's cab and removal and installation....1122
Tilting the operator's cab upward....1122
Tilting the operator's cab downward....1131
Removing the operator's cab....1135
Installing the operator's cab....1144
Checking and adjusting shift units....1149
Controls and instruments....1151
Controls and instruments (summary of references) ....1151
Replacing Bulbs on the Instrument Unit....1151
Removing Control Unit....1151
Removing Control Unit for the Lighting System....1152
Replacing control unit (BCU)....1152
Replacing the control unit (SFA)....1153
Replacing control unit (SIC)....1154
Replace Control Unit (ECU)....1155
Replacing control unit (UIC/PLC)....1155
Replacing terminating bus resistors....1156
Replacing the Performance Monitor (PRF)....1158
Replacing Instrument Unit (BIF)....1158
Air-conditioning system....1161
Air-conditioning system (summary of references)....1161
Special Tools....1161
Specifications....1166
Torques for Tightening Refrigerant Hoses....1167
Safety At Work....1167
Handling Refrigerant....1168
In an Emergency....1168
Safety Equipment....1169
Storage of Refrigerant Containers....1169
R134A Refrigerant....1170
Important Note....1171
Discharging the system....1172
Evacuating the system....1174
Filling with refrigerant oil....1175
Instructions for Starting Up the DENSO Air-Conditioning Compressor....1177
Filling the system....1178
Topping up a partly discharged system....1180
Leak test....1181
Removing the Compressor....1181
Checking Level in the Compressor....1182
Disassembling the Compressor Clutch....1182
Checking Clutch Hub Clearance....1184
Checking the Compressor Manifold....1184
Installing the Compressor....1185
Removing and Installing the Condenser....1186
Removing and Installing the Receiver-Drier....1187
Removing and Installing the Evaporator and Expansion Valve....1188
Replacing the Expansion Valve....1188
Installing Condensation Water Drain Hoses....1189
Removing and Installing the Thermostat Switch....1189
Adjusting Thermostat Switch Bowden Cables....1190
Removing and Installing the High/Low Pressure Switch....1190
Heating system....1191
Heating System (Summary of References)....1191
Removal and Installation of Components....1191
Seats....1193
Seats (summary of references)....1193
Specifications....1193
Comfort seat MSG85....1194
Air comfort seat MSG95, lower section....1207
Exploded view of the passenger seat....1213
Command Arm Repair....1214
Operator's cab....1217
Operator's cab (summary of references)....1217
Removing Cab Frame....1217
Cab mounting torques....1218
Removing the Outer Roof....1220
Removing and Installing the Windshield ....1220
Removing and Installing the Rear Window....1221
Removing and Installing the Roof Hatch....1222
Installing Door Lock....1223
Adjusting Window Contact Pressure....1224
Operator's Cab Door Removal and Installation....1224
Roller Sun-Visor Removal and Installation....1225
Removing Inner Roof Trim....1226
Components of the electronic hitch control....1227
References (parts of electron. lift shaft control)....1227
Disconnecting Electrical Circuit....1227
Service Information....1227
Replacing control unit (BCU)....1227
Replacing the operation unit....1228
Special tools (dealer- fabricated)....1229
Special tools (dealer- fabricated)....1231
Suspension device....1231
Adapter strut....1232
Holding Device....1232
Adapter....1233
Suspension Eyes for Operator's Cab....1233
Holding Device....1234
DFRW79 - Piston Holding Tool....1234
Socket Wrench Insert....1234
Driver....1235
DFRW29—Final Drive Housing Adapter....1236
DFRW30....1237
Axle Jacking Tool....1237
Bushing....1237
Socket Wrench Insert....1238
Special Wrench....1238
Installation tool....1238
Tube....1239
Unlocking Device....1239
Suspension device....1239
John Deere 6820, 6920, 6920S Tractors Repair Technical Manual (TM4756)
