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John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
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John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
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Description
John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
FILE DETAILS:
John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
Language : English
Pages : 478
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
DESCRIPTION:
John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
- This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use.
- Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.
- Technical manuals are divided in two parts: repair and operation and tests. Repair sections tell how to repair the components. Operation and tests sections help you identify the majority of routine problems quickly.
- Information is organized in groups for the various components requiring service instruction. At the beginning of each group are summary listings of all applicable essential tools, service equipment and tools, other materials needed to do the job, service parts kits, specifications, wear tolerances, and torque values.
- Technical Manuals are concise guides for specific machines. They are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair.
- Fundamental service information is available from other sources covering basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of problems and their causes.
TABLE OF CONTENTS:
John Deere 850J Crawler Dozers Repair Technical Manual TM1731 – PDF DOWNLOAD
Contents................................................................................................................ 5 General Information................................................................................................. 7 Safety.......................................................................................................... 9 Recognize Safety Information................................................................................ 9 Follow Safety Instructions.................................................................................. 9 Operate Only If Qualified................................................................................... 9 Wear Protective Equipment................................................................................... 10 Avoid Unauthorized Machine Modifications.................................................................... 10 Inspect Machine............................................................................................. 10 Stay Clear of Moving Parts.................................................................................. 10 Avoid High-Pressure Fluids.................................................................................. 11 Beware of Exhaust Fumes..................................................................................... 11 Prevent Fires............................................................................................... 12 Prevent Battery Explosions.................................................................................. 12 Handle Chemical Products Safely............................................................................. 12 Dispose of Waste Properly................................................................................... 13 Prepare for Emergencies..................................................................................... 13 Add Cab Guarding For Special Uses........................................................................... 13 Use Steps and Handholds Correctly........................................................................... 14 Start Only From Operator's Seat............................................................................. 14 Use and Maintain Seat Belt.................................................................................. 14 Prevent Unintended Machine Movement......................................................................... 14 Avoid Work Site Hazards..................................................................................... 15 Keep Riders Off Machine..................................................................................... 15 Avoid Backover Accidents.................................................................................... 15 Avoid Machine Tip Over...................................................................................... 16 Add and Operate Attachments Safely.......................................................................... 16 Park And Prepare For Service Safely......................................................................... 17 Service Cooling System Safely............................................................................... 17 Remove Paint Before Welding or Heating...................................................................... 17 Make Welding Repairs Safely................................................................................. 18 Drive Metal Pins Safely..................................................................................... 18 Torque Values................................................................................................... 19 Metric Bolt and Cap Screw Torque Values..................................................................... 19 Additional Metric Cap Screw Torque Values................................................................... 20 Unified Inch Bolt and Cap Screw Torque Values............................................................... 21 Service Recommendations for 37° Flare and 30° Cone Seat Connectors.......................................... 22 Service Recommendations for O-Ring Boss Fittings............................................................ 22 O-Ring Boss Fittings In Aluminum Housing Service Recommendations—Excavators................................. 24 Service Recommendations for Flared Connections—Straight or Tapered Threads.................................. 25 Service Recommendations For Flat Face O-Ring Seal Fittings.................................................. 26 O-Ring Face Seal Fittings With SAE Inch Hex Nut And Stud End For High Pressure Service Recommendations...... 27 O-Ring Face Seal Fittings With Metric Hex Nut And Stud End For Standard Pressure Service Recommendations.... 29 O-Ring Face Seal Fittings With Metric Hex Nut And Stud End For High Pressure Service Recommendations........ 31 Service Recommendations for Metric Series Four Bolt Flange Fitting.......................................... 33 Service Recommendations For Inch Series Four Bolt Flange Fittings........................................... 34 Inch Series Four Bolt Flange Fitting For High Pressure Service Recommendations.............................. 35 Service Recommendations For Non-Restricted Banjo (Adjustable) Fittings...................................... 36 Service Recommendations For O-Ring Boss Fittings With Shoulder.............................................. 37 Metric 24° O-Ring Seal DIN 20078 Service Recommendations.................................................... 39 Tracks.............................................................................................................. 41 Track System.................................................................................................... 43 Welding On Machine.......................................................................................... 43 Track Guides and Rock Guards Remove and Install............................................................. 43 Carrier Roller Wear Inspection.............................................................................. 46 Carrier Roller Remove and Install........................................................................... 47 Carrier Roller Disassemble and Assemble..................................................................... 48 Metal Face Seals Inspection................................................................................. 51 Carrier Roller Leakage Test................................................................................. 52 Track Roller Wear Inspection................................................................................ 52 Track Roller Remove and Install............................................................................. 53 Track Roller Disassemble and Assemble....................................................................... 55 Track Roller Leakage Test................................................................................... 64 Track Shoe Grouser Wear Inspection.......................................................................... 65 Track Shoe Remove and Install............................................................................... 66 Pivot Shaft Remove and Install.............................................................................. 67 Pivot Shaft Disassemble and Assemble........................................................................ 67 Crossbar Remove and Install................................................................................. 68 Crossbar Disassemble and Assemble........................................................................... 71 Track Link Height Inspection................................................................................ 72 Bushing Outside Diameter for Lubricated Track Chain Inspection.............................................. 73 Track Pitch for Lubricated Track Chain Inspection........................................................... 74 Lubricated Track Chain Remove and Install................................................................... 74 Lubricated Track Chain to Turn Bushings and Lubricate Chain Disassemble..................................... 78 Lubricated Track Chain to Turn Bushings and Lubricate Chain Assemble........................................ 80 Lubricated Track Chain to Turn Pins and Bushings and Not Lubricate Disassemble and Assemble................. 87 Track Sag Adjustment........................................................................................ 92 Track Adjuster Cylinder and Recoil Spring Remove and Install................................................ 93 Track Adjuster Recoil Spring Disassemble and Assemble....................................................... 95 Track Adjuster Cylinder Disassemble and Assemble............................................................104 Track Frame Remove and Install..............................................................................106 Front Idler Wear Inspection.................................................................................111 Front Idler Remove and Install..............................................................................111 Front Idler Disassemble and Assemble........................................................................117 Front Idler Adjustment......................................................................................123 Front Idler Oil Leakage Test................................................................................125 Sprocket Segment Remove and Install.........................................................................126 Axles and Suspension Systems........................................................................................127 Drive Axle Housing and Support..................................................................................129 Final Drive Remove and Install.............................................................................129 Axle Shaft, Bearings and Reduction Gears........................................................................133 Planet Carrier Remove and Install...........................................................................133 Planet Carrier Disassemble and Assemble.....................................................................134 Ring Gear and Hub Remove and Install........................................................................135 Ring Gear and Hub Disassemble and Assemble..................................................................136 Final Drive Metal Face Seal Remove and Install..............................................................137 Inner Final Drive Housing Remove and Install................................................................153 Inner Final Drive Housing Cover Disassemble and Assemble....................................................155 Final Drive Seal Leakage Check..............................................................................160 Transmission........................................................................................................163 Remove and Install..............................................................................................165 Hydrostatic Pump Remove and Install.........................................................................165 Hydrostatic Motor Remove and Install........................................................................171 Control Linkage.................................................................................................173 Transmission Control Lever (TCL) Remove and Install.........................................................173 Transmission Control Lever (TCL) Disassemble and Assemble...................................................174 Hydrostatic System..............................................................................................191 Hydrostatic Pump Disassemble................................................................................191 Charge Pump Disassemble and Assemble........................................................................197 Pump Displacement Control Valve (PDCV) Disassemble and Assemble.............................................201 Multi-Function Valve Remove and Install.....................................................................202 Multi-Function Valve Disassemble and Assemble...............................................................202 Hydrostatic Pump Assemble...................................................................................204 Hydrostatic Motor Disassemble...............................................................................221 Hydrostatic Motor Assemble..................................................................................227 Hydraulic Integrated Circuit (HIC) Valve Remove and Install.................................................241 Hydraulic Integrated Circuit (HIC) Valve Disassemble and Assemble...........................................243 Hydrostatic Reservoir Remove and Install....................................................................245 Hydraulic Fan Motor Remove and Install......................................................................247 Hydraulic Fan Pump Remove and Install.......................................................................248 Hydraulic Fan Reversing Valve Remove and Install............................................................249 Hydraulic Fan Reversing Valve Disassemble and Assemble......................................................250 Engine..............................................................................................................251 Removal and Installation........................................................................................253 Engine Remove and Install...................................................................................253 Oil Pan Remove and Install..................................................................................264 Flywheel Remove and Install.................................................................................271 Engine Mounts Remove and Install............................................................................274 Engine Auxiliary Systems............................................................................................277 Cold Weather Starting Aid.......................................................................................279 Starting Aid Assembly Remove and Install....................................................................279 Cooling System..................................................................................................281 Fan Blade Remove and Install................................................................................281 Fan Shroud Remove and Install...............................................................................281 Cooling Package Remove and Install..........................................................................283 Engine Speed Control............................................................................................289 Decelerator/Brake Pedal Remove and Install..................................................................289 Decelerator/Brake Pedal Disassemble and Assemble............................................................290 External Exhaust Systems........................................................................................295 Muffler Remove and Install..................................................................................295 External Fuel Supply Systems....................................................................................297 Fuel Tank Remove and Install................................................................................297 Auxiliary Water Separator Fuel Filter Remove and Install—If Equipped........................................299 Dampener Drive......................................................................................................301 Elements........................................................................................................303 Dampener Drive Remove and Install (SN 130866—135190)........................................................303 Damper Drive Remove and Install.............................................................................305 Park Brake..........................................................................................................307 Park Brake......................................................................................................309 Park Brake Remove and Install...............................................................................309 Control Linkage.................................................................................................310 Park Lock Linkage Remove and Install........................................................................310 Park Lock Linkage Disassemble and Assemble..................................................................311 Hydraulic System................................................................................................313 Park Brake Disassemble and Assemble.........................................................................313 Equipment Attaching.................................................................................................319 Drawbar.........................................................................................................321 Extended Rigid Drawbar Remove and Install...................................................................321 Rigid Drawbar Remove and Install............................................................................322 Frames, Chassis, or Supporting Structure............................................................................323 Frame Installation..............................................................................................325 Welding Repair of Major Structures..........................................................................325 Frame Bottom Guards.............................................................................................327 Bottom Guards Remove and Install............................................................................327 Chassis Weights.................................................................................................329 Front Counterweight Remove and Install......................................................................329 Rear Counterweight Remove and Install.......................................................................331 Additional Rear Counterweight Remove and Install (If Equipped)..............................................333 Operator’s Station..................................................................................................337 Removal and Installation........................................................................................339 Cab/ROPS Remove and Install.................................................................................339 Operator Enclosure..............................................................................................343 Remove and Install Window...................................................................................343 Remove and Install Windowpanes..............................................................................344 Hand Pump Bleed Procedure...................................................................................344 Wiper Arm Installation......................................................................................345 Seat and Seat Belt..............................................................................................347 Disassemble and Assemble Seat...............................................................................347 Heating and Air Conditioning....................................................................................353 R134a Refrigerant Cautions..................................................................................353 R134a Compressor Oil Charge Check...........................................................................353 R134a Compressor Oil Removal................................................................................353 R134a Component Oil Charge..................................................................................354 Leakage Testing.............................................................................................355 R134a Refrigerant Recovery, Recycling and Charging Station Installation Procedure...........................355 Recover R134a System........................................................................................356 Evacuate R134a System.......................................................................................357 Charge R134a System.........................................................................................358 Air Conditioner System Cleaning Procedures..................................................................359 Purge R134a System..........................................................................................359 Flush R134a System..........................................................................................360 Evaporator or Heater Core Remove and Install................................................................361 Expansion Valve Remove and Install..........................................................................363 A/C Freeze Switch Remove and Install........................................................................363 Upper Cab Heater Blower Motor and Heater Blower Resistor Remove and Install.................................364 Cab Upper Heater Disassemble and Assemble...................................................................366 Cab or ROPS Under Seat Heater Disassemble and Assemble......................................................368 Receiver-Dryer Remove and Install...........................................................................370 Condenser Remove and Install................................................................................370 Compressor Remove and Install...............................................................................371 Compressor Clutch Disassemble and Assemble..................................................................373 Clutch Hub Clearance Check..................................................................................374 Compressor Manifold Inspect.................................................................................374 Compressor Disassemble and Assemble.........................................................................375 Sheet Metal.........................................................................................................379 Hood and Engine Enclosures......................................................................................380 Hood Remove and Install.....................................................................................380 Engine Side Shields Remove and Install......................................................................382 Hood Support Remove and Install.............................................................................383 Safety, Convenience and Miscellaneous...............................................................................385 Horn and Warning Devices........................................................................................387 Remove and Install Reverse Alarm............................................................................387 Adjust Reverse Warning Alarm Volume.........................................................................387 Bulldozer...........................................................................................................389 Blade...........................................................................................................391 Cutting Edges and End Bits Remove and Install...............................................................391 Blade Remove and Install....................................................................................392 Blade Remove and Install—Mechanical Angle Blade.............................................................393 Frames..........................................................................................................399 Outside Dozer Push Beams Remove and Install.................................................................399 C-Frame Remove and Install..................................................................................412 Pushbeams Remove and Install—Mechanical Angle Blade.........................................................413 Hydraulic System................................................................................................419 Hydraulic Pump Remove and Install...........................................................................419 Hydraulic Pump Disassemble and Assemble.....................................................................421 Hydraulic Pump Control Valve Disassemble and Assemble.......................................................422 Hydraulic Reservoir Remove and Install......................................................................423 Hydraulic Reservoir Cleanout Cover Remove and Install.......................................................425 Hydraulic Control Valve Remove and Install..................................................................428 Hydraulic Control Valve Disassemble and Assemble............................................................429 Hydraulic Control Valve Disassemble and Assemble—IGC........................................................432 Pilot Control Valve Remove and Install......................................................................435 Pilot Control Valve Disassemble and Assemble................................................................436 Integrated Grade Control (IGC) Lever Remove and Install (S.N. 130886—)......................................437 Integrated Grade Control (IGC) Lever Disassemble and Assemble (S.N. 130886—)................................440 Quick-Drop Valve Remove and Install.........................................................................441 Power Angle Tilt (PAT) Cylinder Remove and Install..........................................................442 Angle Cylinder (PAT) Remove and Install.....................................................................442 Hydraulic Cylinder Repair...................................................................................443 Ground Conditioning Tool............................................................................................445 Ripper..........................................................................................................447 Ripper Remove and Install—If Equipped.......................................................................447 Ripper Install..............................................................................................453 Dealer Fabricated Tools.............................................................................................457 Dealer Fabricated Tools.........................................................................................459 DF1041 Track Nut Removal Tool...............................................................................459 DF1063 Final Drive Lift Bracket.............................................................................460 DF1065 Final Drive and Pump Adapter Bracket.................................................................461 DFT1132 Hydrostatic Motor Removal and Installation Tool.....................................................462 DFT1137 Hydrostatic Motor Removal and Installation Tool.....................................................463 DFT1167 Final Drive Lifting Bracket Adapter Spacer..........................................................464 DFT1243 Lifting Bracket Extension...........................................................................465 DFT1250 Lifting Bracket.....................................................................................466 DFT1260 Final Drive Lifting Fixture.........................................................................468 DFT1261 Rolling Torque Measurement Tool.....................................................................469 DFT1302 Final Drive Pressure Test Adapter...................................................................469 Page Number............................................................................................................. 5 Section 00.......................................................................................................... 7 Group 01........................................................................................................ 9 Group 03........................................................................................................ 19 Section 01.......................................................................................................... 41 Group 0130...................................................................................................... 43 Section 02..........................................................................................................127 Group 0201......................................................................................................129 Group 0250......................................................................................................133 Section 03..........................................................................................................163 Group 0300......................................................................................................165 Group 0315......................................................................................................173 Group 0360......................................................................................................191 Section 04..........................................................................................................251 Group 0400......................................................................................................253 Section 05..........................................................................................................277 Group 0505......................................................................................................279 Group 0510......................................................................................................281 Group 0515......................................................................................................289 Group 0530......................................................................................................295 Group 0560......................................................................................................297 Section 07..........................................................................................................301 Group 0752......................................................................................................303 Section 11..........................................................................................................307 Group 1100......................................................................................................309 Group 1115......................................................................................................310 Group 1160......................................................................................................313 Section 15..........................................................................................................319 Group 1511......................................................................................................321 Section 17..........................................................................................................323 Group 1740......................................................................................................325 Group 1746......................................................................................................327 Group 1749......................................................................................................329 Section 18..........................................................................................................337 Group 1800......................................................................................................339 Group 1810......................................................................................................343 Group 1821......................................................................................................347 Group 1830......................................................................................................353 Section 19..........................................................................................................379 Group 1910......................................................................................................380 Section 20..........................................................................................................385 Group 2004......................................................................................................387 Section 32..........................................................................................................389 Group 3201......................................................................................................391 Group 3240......................................................................................................399 Group 3260......................................................................................................419 Section 42..........................................................................................................445 Group ..........................................................................................................447 Section 9900........................................................................................................457 Group 0999......................................................................................................459
S.S 26/02/2025
