John Deere Crawler Dozers 750C, 850C Operation & Test Service Manual (TM1588)

Complete Diagnostics Operation manual with electrical wiring diagrams for John Deere Crawler Dozers 750C, 750C Series II, 850C, 850C Series II, with workshop information to maintain, diagnose, and service like professional mechanics.

John Deere Crawler Dozers 750C, 850C workshop Diagnosis Test 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.

TM1588 - John Deere 750C, 750C Series II, 850C, 850C Series II Crawler Dozers Technical Manual - Operation and Test.pdf
tm10063 - John Deere 750C, 850C Bouteur chenillé Fonctionnement et tests.pdf
tm2947 - John Deere 750C, 850C Bulldozer sobre orugas Funcionamiento y pruebas.pdf

Total Pages: 1,191 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable)
Category: Operation and Test
Language: English Spanish French
Published on 2018/03/06

tm1588 - 750C, 750C Series II, 850C, 850C Series II Crawler Dozer
Table of Contents
Foreword
Technical Information Feedback Form
Section 9000: General Information
Group 01: Safety
Handle Fluids Safely—Avoid Fires
Prevent Battery Explosions
Prepare for Emergencies
Prevent Acid Burns
Handle Chemical Products Safely
Avoid High-Pressure Fluids
Park Machine Safely
Support Machine Properly
Wear Protective Clothing
Work in Clean Area
Service Machines Safely
Work In Ventilated Area
Illuminate Work Area Safely
Replace Safety Signs
Use Proper Lifting Equipment
Remove Paint Before Welding or Heating
Avoid Heating Near Pressurized Fluid Lines
Keep ROPS Installed Properly
Practice Safe Maintenance
Decommissioning — Proper Recycling and Disposal of Fluids and Components
Live With Safety
Group 02: General Specifications
750C Specifications
750C Capacity Specifications
750C General Specifications
750C Dimensions
750C WT Dimensions
750C LGP Dimensions
750C LT Series II Dimensions
750C WT Series II Dimensions
750C LGP Series II Dimensions
850C Specifications
850C Capacity Specifications
850C General Specifications
850C Dimensions
850C WT Dimensions
850C LGP Dimensions
850C LT Series II Dimensions
850C WT Series II Dimensions
850C LGP Series II Dimensions
Group 03: Torque Values
Hardware Torque Specifications
Keeping ROPS Installed Properly
Checking Track Shoe Cap Screw Torque
Checking Track Shoe Cap Screw Torque—Master Link
Metric Bolt and Screw Torque Values
Additional Metric Cap Screw Torque Values
Service Recommendations for Metric Series Four Bolt Flange Fitting
Unified Inch Bolt and Screw Torque Values
Check Oil Lines And Fittings
Service Recommendations for O-Ring Boss Fittings
Service Recommendations For Flat Face O-Ring Seal Fittings
Service Recommendations For Inch Series Four Bolt Flange Fittings
Group 04: Fuels and Lubricants
Diesel Fuel
Handling and Storing Diesel Fuel
Fuel Tank
Low Sulfur Diesel Fuel Conditioner
Diesel Fuel Storage
Diesel Engine Oil — Non-Emissions Certified and Certified Tier 1 and Stage I
Transmission, Hydraulic, and Hand Pump Reservoir Oil
Inner and Outer Final Drive Oil
Track Rollers, Front Idler, Carrier Roller and Track Frame Outer Pivot Oil
Grease
Lubricant Storage
Alternative and Synthetic Lubricants
Mixing of Lubricants
Diesel Engine Coolant (engine with wet sleeve cylinder liners)
Section 9005: Operational Checkout Procedure
Group 10: Operational Checkout Procedure
Operational Checkout Procedure
Section 9010: Engine
Group 05: Theory of Operation
6068 John Deere Engine—Use CTM8
6068 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM104
6076 John Deere Engine—Use CTM42
6081 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM134
Sectional View (6068) Engine—750C
General (6068) Engine Description—750C (S.N. —831315)
General (6068) POWERTECH POWERTECH is a trademark of Deere & Company Engine Description—750C (S.N. 831316— )
Sectional View (6076) Engine—850C (S.N. —822867)
General (6076) Engine Description—850C (S.N. —822867)
Sectional View (6081) POWERTECH POWERTECH is a trademark of Deere & Company Engine—850C (S.N. 822868— )
General (6081) POWERTECH POWERTECH is a trademark of Deere & Company Engine Description—850C (S.N. 822868— )
Group 10: System Operational Checks
6068 John Deere Engine—Use CTM8
6068 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM104
6076 John Deere Engine—Use CTM42
6081 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM134
Engine Operational Checks
Group 15: Diagnostic Information
Diagnose Engine Malfunctions
Cooling System Inspection
Group 20: Adjustments
6068 John Deere Engine—Use CTM8
6068 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM104
6076 John Deere Engine—Use CTM42
6081 John Deere POWERTECH POWERTECH is a trademark of Deere & Company Engine—Use CTM134
JT05801 Clamp-On Electronic Digital Tachometer Installation
Fan Belt Tension Adjustment—750C (S.N. —831315)
Engine Speed Adjustment—750C
Engine Speed Adjustment—850C
Engine Speed Control Cable Adjustment
Engine Speed Control Sensor Adjustment (750C, 850C S.N.—875378)
Decelerator Sensor Adjustment—Single Lever Steer
Throttle Sensor Adjustment—850C (S.N. 822868— )
Fuel Shut-Off Solenoid Adjustment—850C (S.N. —822867)
Primary Fuel Filter, Drain Valve—750C
Primary Fuel Filter, Drain Valve—850C
Bleed the Fuel System—750C
Bleed the Fuel System—850C
Group 25: Tests
JT07158 TIME TRAC TIME TRAC is a registered trademark of the Stanadyne Automotive Corp. Installation
Injection Pump Dynamic Timing—750C
Compression Pressure Test
Radiator Air Flow Test
JT05529 Air Flowmeter Test Record
Fuel Line Leakage Test
Air Intake System Leakage Test
Air Filter Restriction Indicator Switch Test
Check Engine Performance Using Turbocharger Boost Pressure Test
Fuel Supply Pump Pressure Test
Section 9015: Electrical System
Group 05: System Information
Visually Inspect Electrical System
Electrical Circuit Malfunctions
High Resistance Circuit
Open Circuit
Grounded Circuit
Shorted Circuit
Multimeter
Seven Step Electrical Test Procedure
Welding Procedure
Wiring Diagram and Schematic Information
Reading a System Functional Schematic
Reading a Wiring Diagram
Electrical Schematic Symbols
Group 10: System Diagrams
Fuse (Blade-Type) Color Codes
Fuse Specifications
Component Identification Table
Wiring and Schematic Diagrams Legend (S.N. —883331)
System Functional Schematic Section Legend (S.N. —883331)
System Functional Schematic (S.N. —883331) 1 Of 6
System Functional Schematic (S.N. —883331) Continued 2 Of 6
System Functional Schematic (S.N. —883331) Continued 3 Of 6
System Functional Schematic (S.N. —883331) Continued 4 of 6
System Functional Schematic (S.N. —883331) Continued 5 Of 6
System Functional Schematic (S.N. —883331) Continued 6 Of 6
Wiring and Schematic Diagrams Legend With Speed In Grip (S.N. 883332— )
System Functional Schematic Section Legend With Speed In Grip (S.N. 883332— )
System Functional Schematic With Speed In Grip (S.N. 883332— ) 1 Of 6
System Functional Schematic With Speed In Grip (S.N. 883332— ) Continued 2 Of 6
System Functional Schematic With Speed In Grip (S.N. 883332— ) Continued 3 Of 6
System Functional Schematic With Speed In Grip (S.N. 883332— ) Continued 4 Of 6
System Functional Schematic With Speed In Grip (S.N. 883332— ) Continued 5 Of 6
System Functional Schematic With Speed In Grip (S.N. 883332— ) Continued 6 Of 6
Cab Harness (W6) Wiring Diagram (S.N. —822867)
Cab Harness (W6) Component Location (S.N. —822867)
Cab Harness (W6) Wiring Diagram (S.N. 822868—883331)
Cab Harness (W6) Component Location (S.N. 822868—883331)
Cab Harness (W6) Wiring Diagram With Speed In Grip (S.N. 883332— )
Cab Harness (W6) Component Location With Speed In Grip (S.N. 883332— )
Chassis Harness (W7) Wiring Diagram
Chassis Harness (W7) Component Location
Engine/Pump Harness (W8) Wiring Diagram 750C (S.N. —831315) and 850C (S.N. —822867)
Engine/Pump Harness (W8) Component Location 750C (S.N. —831315)
Engine/Pump Harness (W8) Component Location 850C (S.N. —822867)
Engine/Pump Harness (W8) Wiring Diagram 750C (S.N. 831316—883331)
Engine/Pump Harness (W8) Component Location 750C (S.N. 831616—883331)
Engine/Pump Harness (W8) Wiring Diagram 750C (S.N. 883332—)
Engine/Pump Harness (W8) Component Location 750C (S.N. 883332—)
Engine/Pump Harness (W8) Wiring Diagram 850C (S.N. 822868—)
Engine/Pump Harness (W8) Component Location 850C (S.N. 822868— )
Grille Harness (W9) Component Location 750C (S.N. —831315) and 850C (S.N. —822867)
Grille Harness (W9) Wiring Diagram 750C (S.N. —831315) and 850C (S.N. —822867)
Grille Harness (W9) Wiring Diagram 750C (S.N. 831316— ) and 850C (S.N. 822868— )
Grille Harness (W9) Component Location 750C (S.N. 831316— ) and 850C (S.N. 822868— )
Motor Harness (W10) Component Location
Motor Harness (W10) Wiring Diagram
Wiper Harness (W11) Wiring Diagram
Wiper Harness (W11) Component Location
A/C Compressor Harness (W12) Wiring Diagram 750C (S.N. —831315) and 850C (S.N. —822867)
A/C Compressor Harness (W12) Component Location 750C (S.N. —831315) and 850C (S.N. —822867)
A/C Condenser Harness (W13) Wiring Diagram
A/C Condenser Harness (W13) Component Location
Group 15: Sub-System Diagnostics
Power Circuit Operational Information
Power Circuit Theory of Operation
Power Circuit Schematic
Start Circuit Operational Information
Start Circuit Theory of Operation
Start Circuit Schematic 750C and 850C (S.N. —822867)
Start Circuit Schematic 850C (S.N. 822868—883331)
Start Circuit Schematic 750C, 850C (S.N. 883332—)
Charging Circuit Operational Information
Charging Circuit Theory of Operation
Charging Circuit Schematic
Display Monitor Switch, Sender and Gauge Input Specifications
Display Monitor Circuit Operational Information
Display Monitor Circuit Theory of Operation
Display Monitor Circuit Schematic
Fuel Shut-Off Circuit Operational Information
Fuel Shut-Off Circuit Theory of Operation
Fuel Shut-Off Circuit Schematic 750C and 850C (S.N. —822867)
Fuel Shut-Off Circuit Schematic 850C (S.N. 822868— )
Start Aid Circuit Operational Information
Start Aid Circuit Theory of Operation
Start Aid Circuit Schematic
Front and Rear Light Circuit Operational Information
Front and Rear Light Circuit Theory of Operation
Front and Rear Light Circuit Schematic
Transmission Control Circuit Operational Information
Transmission Control Circuit Schematic (S.N. —883331)
Transmission Control Circuit Schematic With Speed In Grip (S.N. 883332— )
Transmission Control Circuit (Flow Chart) (S.N. —883331)
Transmission Control Circuit With Speed In Grip (Flow Chart) (S.N. 883332— )
Transmission Controller Service Codes Diagnostic Procedures
Calculations For Diagnostic Transmission Calibration Limits For (B11) FNR Sensor With Speed In Grip (S.N. 883332— )
Engine Control Circuit Operational Information 850C (S.N. 822868— )
Engine Control Circuit Theory of Operation 850C (S.N. 822868— )
Engine Control Circuit Schematic 850C (S.N. 822868— )
Engine Control Circuit (Flow Chart) 850C (S.N. 822868— )
Engine Control Circuit Diagnostic Schematic 850C (S.N. 822868— )
Engine Control Circuit Diagnostic Procedures 850C (S.N. 822868— )
Horn Circuit Operational Information
Horn Circuit Theory of Operation
Horn Circuit Schematic (S.N. —883331)
Horn Circuit Schematic (S.N. 883332— )
Dome Light Circuit Operational Information
Dome Light Circuit Theory of Operation
Dome Light Circuit Schematic
Front Wiper and Washer Circuit Operational Information
Front Wiper and Washer Circuit Theory of Operation
Front Wiper and Washer Circuit Schematic
Left and Right Door Wiper Circuit Operational Information
Left and Right Door Wiper Circuit Theory of Operation
Left and Right Door Wiper Circuit Schematic
Heater Blower Circuit Operational Information
Heater Blower Circuit Theory of Operation
Heater Blower Circuit Schematic
Radio Circuit Operational Information
Radio Circuit Theory of Operation
Radio Circuit Schematic
Quick Drop Valve Circuit Operational Information
Quick Drop Valve Circuit Theory of Operation
Quick Drop Valve Circuit Schematic
Group 20: TCU Calibration and Diagnostics
Transmission Calibration Theory of Operation — 700 Or Higher Software
Transmission Control Unit (TCU) Calibration with Transmission Decelerator Only, Single Lever Control, and 556 or 600 Software
Transmission Control Unit (TCU) Calibration with Transmission and Engine Decelerator, Single Lever Control, and 556 or 600 Software
Transmission Control Unit (TCU) Calibration with 700 or Higher Software
Calibration Service Codes (Single Lever Steer)
Maximum Ground Speed Service Codes (Single Lever Steer)
Transmission Control Circuit Theory of Operation (S.N. —883331)
Transmission Control Circuit Theory of Operation With Speed In Grip (S.N. 883332— )
Transmission Control Calibration Code Diagnostic Procedures
Transmission Controller Circuit Diagnostic Procedures
Transmission Control Unit (TCU) Calibration with Pedal Steer and 556 or 600 Software
Calibration Service Codes (Pedal Steer)
Maximum Ground Speed Service Codes (Pedal Steer)
Calibration Limits Work Sheet (S.N. —883331)
Calibration Limits Work Sheet With Speed In Grip (S.N. 883332—)
Group 35: References
Alternators and Starting Motors—Use CTM77
JT05801 Clamp-On Electronic Tachometer Installation
Battery Operation
Battery Specifications
Diagnose Battery Malfunctions
Check Battery Electrolyte Level and Terminals
Using Booster Batteries—24 Volt System
Alternator Operation—45 Amp Bosch
Program Display Monitor
Calibrate Tachometer
Access Display Monitor Service Codes
Setting Transmission Controller Rate Of Shift (With 600 or Higher Software Number S.N. 875379— )
Check Setting of Transmission Controller Rate Of Shift (With 600 or Higher Software Number S.N. 875379— )
Monitor Service Codes
Engine Controller Service Codes 850C (S.N. 822868— )
Calibrate Engine Controller 850C (S.N. 822868— )
Engine Calibration Service Codes 850C (S.N. 822868— )
Machine Identity Plugs
Rotary Sensor Component Location (Single Lever Steer) (S.N. —883331)
Rotary Sensor Component Location (Pedal Steer) (S.N. —883331)
Rotary Sensor Component Location With (SIG) Speed In Grip (S.N. 883332— )
Transmission Controller Abbreviations
Test Harness Kit
ServiceEXPERT Computer Connections (750C and 850C Crawler)
Preparing PDM to Take Readings
Section 9020: Power Train
Group 05: Theory of Operation
Final Drive and Park Brake Operation
Group 10: System Operational Checks
Undercarriage System Operational Checks
Group 15: Diagnostic Information
Diagnose Undercarriage Malfunctions
Measure Carrier Roller Wear
Measure Track Roller Wear
Measure Track Shoe Grouser Wear
Measure Front Idler Wear
Measure Track Pitch for Lubricated Track Chain
Measure Bushing Outside Diameter for Lubricated Track Chain
Measure Link Height
Group 20: Adjustments
Adjust Track Sag
Adjust Front Idler Horizontal Movement
Adjust Front Idler Vertical Movement
Adjust Brake Pedal
Adjust Decelerator Pedal
Section 9025: Hydraulics
Group 05: Theory
Dozer Hydraulic System Operation
Hydraulic Component Location
Hydraulic Oil Cooler Component Location 850C (S.N. 883332— )
Hydraulic Pump Operation
Hydraulic Control Valve, Cross Section
Hydraulic Control Valve Component Location/Schematic
Unloading Valve Operation
Blade Lift Valve Section Operation
Blade Tilt Valve Section Operation
Auxiliary Valve with Power Beyond Section Operation
Circuit Relief Valve with Anti-Cavitation Operation
System Relief Valve Operation
Hydraulic Filter Operation
Blade Lift Cylinder Bypass Valve Operation
Angledozer Tilt Cylinder Bypass Valve Operation
Quick-Drop Valve Operation
Group 15: Diagnostic Information
Diagnose Malfunctions of Hydraulic System
Group 25: Tests
JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
System Relief Valve Test
Circuit Relief Valve Test—with Remote Pump
Circuit Relief Valve Test
Hydraulic Cylinder Drift Test Procedure
Lift Cylinder Function Drift Test
Lift Cylinder Head End and Rod End Poppet and Piston Seal Leakage Test
Tilt Cylinder Function Drift Test
Tilt Cylinder Piston Seal Leakage Test
Pump General Performance Test Using Cycle Times
Cycle Time Test
Hydraulic Pump Flow Test
Hydraulic Oil Clean-Up Procedure Using Portable Filter Caddy
Section 9026: Hydrostatic System
Group 05: Theory of Operation
Hydrostatic System
Transmission Control Circuit (Flow Chart)
Charge Pump
Hydrostatic Filter and Neutral Charge Relief Valve
Multi-Function Valve
Park Brake Valve
Oil Cooler Bypass Valve
Pump and Motor Pressure Control Pilot (PCP)
Pump Displacement Control Valve (PDCV)
Hydrostatic Pump
Flushing Valve and Operating Charge Relief Valve
Hydrostatic Motor Operation
Hydrostatic System Component Location—Forward
Hydrostatic System Diagram—Park Brake On
Hydrostatic System Diagram—Reverse (Low Speed)
Hydrostatic System Diagram—Forward (High Speed)
Hydrostatic Schematic—Neutral (Park Brake On)
Group 10: System Operational Checks
Hydrostatic Transmission Operational Checks
Group 15: Diagnostic Information
Hydrostatic Transmission
Diagnostic Flow Charts
Group 20: Adjustments
JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
Park Lock Linkage Adjustment
Motor Displacement Control Valve Adjustment
Engine Speed Control Cable Adjustment
Engine Speed Control Sensor Adjustment (750C, 850C S.N.—875378)
Decelerator Sensor Adjustment—Single Lever Steer
Throttle Sensor Adjustment—850C (S.N. 822868— )
Group 25: Tests
Transmission Oil Warm-Up Procedure
Disconnect Park Brake or Multi-Function Valve for Diagnostic Test
Hand Pump Bleed Procedure
Tilt Cab or ROPS
Hydrostatic Pump and Motor Initial Start-Up Procedure
Hydrostatic Pump Flushing Procedure
Pressure Control Pilot (PCP) Test
Pressure Control Pilot (PCP) Internal Adjustment
Pressure Control Pilot (PCP) Manual Override Test
Tow Disconnect Relief Valve Test
Multi-Function Relief Valve Test
Neutral Charge Relief Pressure Test
Operating Charge Relief Pressure Test
Pump Displacement Control Valve Neutral Adjustment
Cooler Bypass Valve Test
Transmission Efficiency Test
Hydrostatic Motor Speed Sensor Adjustment
Hydrostatic Pump Speed Sensor Adjustment
Charge Pump Flow Test
FNR and Neutral Start Switch Adjustment—Pedal Steer
FNR and Neutral Start Switch Adjustment—Single Lever Steer
Single Lever Control (SLC) Adjustment (with Speed in Grip)
Section 9031: Heating and Air Conditioning
Group 05: Theory of Operation
Proper Refrigerant Handling
R134a Refrigerant Cautions
R134a Refrigerant Theory of Operation
Air Conditioning Circuit Specifications
Air Conditioning Circuit Operational Information
Air Conditioning Circuit Theory of Operation
Air Conditioning Circuit Schematic
Heater Blower Circuit Operational Information
Heater Blower Circuit Theory of Operation
Heater Blower Circuit Schematic
Receiver/Dryer Operation
Expansion Valve Operation
Compressor Relief Valve Operation
Temperature Control
Group 10: System Operational Checks
Air Conditioning Operational Checks
Group 15: Diagnostic Information
Diagnose Air Conditioning Electrical Malfunctions
Air Conditioning Component Location
Group 20: Adjustments
Special or Essential Tools
Service Equipment and Tools
Other Materials
Specifications
Proper Refrigerant Handling
R134a Refrigerant Cautions
R134a Compressor Oil Charge Check
R134a Compressor Oil Removal
R134a Component Oil Charge
R134a Refrigerant Recovery/Recycling and Charging Station Installation Procedure
Recover R134a System
Evacuate R134a System
Charge R134a System
Check and Adjust Compressor Belt Tension (750C)
Group 25: Tests
Special or Essential Tools
Service Equipment and Tools
Specifications
Proper Refrigerant Handling
R12 and R134a Refrigerant Cautions
Pressure Diagnostic Chart
Expansion Valve Operating Test
Low Pressure Switch Test
High Pressure Switch Test
Freeze Control Switch Test
Leak Testing
Refrigerant Hoses and Tubing Inspection

John Deere Crawler Dozers 750C, 850C Operation & Test Service Manual (TM1588)