John Deere 7600 7700 7800 2WD MFWD Tractor Diagnostics & Tests Workshop Repair Manual PDF (TM1501) - MJODTM1501.zip
Full Diagnostics & Tests service manual featuring electrical schematics for the John Deere 7600, 7700 and 7800 (2WD or MFWD) Tractors, packed with every technical detail needed to maintain, troubleshoot and repair these machines like a certified technician.
The John Deere 7600, 7700 and 7800 (2WD or MFWD) Tractors Diagnosis & Tests workshop manual covers:
* 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.
tm1501 - 7600, 7700 and 7800 Tractors Technical Manual - Operation and Test.pdf
Total Pages: 1,561 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable)
Language: English
MAIN SECTIONS
Foreword
Safety Information
Safety
General Information
Operational Checks
General Reference Information
Test Equipment Calibration
Diagnostic Service Codes
CCU
HCU
LHP
PCU
Observable Symptoms
Brakes
Hitch
Operators Station
Hydraulics
Engine Operation and Tests
General Information
Fuel, Air Intake and Engine Cooling Systems
Fuel/Air/Cooling System Theory of Operation
Electrical Operation and Tests
Diagnostic Codes and Addresses
Electrical System Information
System Diagrams
Sub-System Diagnostics
Calibration and References
Power Shift Transmission
Operational Checks
Power Shift Transmission Diagnosis
Theory of Operation
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Transmission
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Transmission Operational Checks
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Transmission Diagnosis
Theory of Operation
Drive Systems
Operational Checks
Drive System Diagnosis
Adjustments
Theory of Operation
Steering and Brakes
Tests and Adjustments
Theory of Operation
Hydraulic System
Operational Checks
Hydraulic System Diagnosis
Calibration and Adjustments
Theory of Operation
Operator Station
Air Conditioning Operational Checks
Air Conditioning System Diagnosis
Air Conditioning Theory of Operation
Dealer Fabricated Tools
tm1501 - 7600, 7700 and 7800 Tractors Operation and Test
Table of Contents
Foreword
Section 205: Safety Information
Group 05: Safety
Recognize Safety Information
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
Avoid High-Pressure Fluids
Service Accumulator Systems Safely
Remove Paint Before Welding or Heating
Avoid Heating Near Pressurized Fluid Lines
Keep ROPS Installed Properly
Service Tires Safely
Avoid Harmful Asbestos Dust
Practice Safe Maintenance
Use Proper Tools
Dispose of Waste Properly
Prevent Machine Runaway
Handle Starting Fluid Safely
Service Cooling System Safely
Stay Clear of Rotating Drivelines
Protect Against High Pressure Spray
Construct Dealer-Made Tools Safely
Clean Vehicle of Hazardous Pesticides
Live With Safety
Section 210: General Information
Group 05: Operational Checks
Electrical System Checks
Before You Start
Transmission Checks
Before You Start
Hydraulic System Checks
Air Conditioning System Checks
Group 10: General Reference Information
JT03412—Supplemental Pressure Test Kit
JT03413—Supplemental Flow Test Kit
JT03419—ORFS Fitting Kit
JT05406—Master Hydraulic Flow Test Fitting Kit
JT05416—Consumer Products Hydraulic Flow Test Kit
JT05452—Power Shift Transmission Test Kit
JT03134—Power Shift Transmission Optional Accessories
JT05469—Flowmeter Kit
JT05470—Agricultural Universal Pressure Test Kit
Required Test Fittings
List of Diagnostic Adapters—ORFS
Unified Inch Bolt and Screw Torque Values
Metric Bolt and Screw Torque Values
JIC Hydraulic Symbols
Glossary of Terms
Group 15: Test Equipment Calibration
JDG282 Temperature Gauge Check
Calibration Check of OTC Flow Meters
Method No. 1: Flow Meter (Main Pump Quick Check From SCV)
Method No. 2: Volume Check From Flow Meter
Pressure Gauge Calibration Checker
Section 211: Diagnostic Service Codes
Group 05: CCU
CCU 001 - Fuel Level Sensor Circuit, Repair
CCU 003 - Fuel Level Low
CCU 010 - Engine Coolant Temperature High, Repair
CCU 011 - Engine Coolant Temperature Very High, Repair
CCU 012 - Coolant Temperature Sensor / Circuit Open, Repair
CCU 013 - Coolant Temperature Sensor / Circuit Shorted, Repair
CCU 015 - Hydraulic Oil Temperature High, Repair
CCU 016 - Hydraulic Oil Temperature Very High, Repair
CCU 017 - Hydraulic Oil Temperature Sensor Circuit Open, Repair
CCU 018 - Hydraulic Oil Temperature Sensor Circuit Shorted, Repair
CCU 021 - Engine Oil Pressure Low (Pressure Switch), Repair
CCU 026 - Transmission Oil Pressure Low, Repair
CCU 030 - Engine Air Filter Restricted, Repair
CCU 035 - Transmission Oil Filter Restricted, Repair
CCU 045 - System Voltage Too Low (Idle-to-1500 rpm), Repair
CCU 046 - System Voltage Too Low (Above 1500 rpm), Repair
CCU 047 - System Voltage Too High (Engine running), Repair
CCU 048 - CCU Supply Voltage Low w/Engine OFF
CCU 050 - Hydraulic Oil Filter Restricted, Repair
CCU 055 - Secondary Hand Brake ON when Moving
CCU 060 - High Pressure In Steering Hydraulic System, Repair
CCU 067 - Sensor Power Source (12V) Missing Fuse F1, Repair
CCU 070 - Operator Not Seated w/Rear PTO ON
CCU 071 - PTO Switch ON at Power Up
CCU 072 - Rear PTO Control Switch/Circuit Failed, Repair
CCU 073 - Rear PTO Solenoid/Circuit Failed, Repair
CCU 075 - Rear PTO Speed Too Low with PTO ON, Repair
CCU 077 - Operator Not Seated w/Front PTO ON
CCU 078 - Front PTO-Switch OFF But Solenoid ON, Repair
CCU 080 - Differential Lock Switch Stuck ON, Repair
CCU 081 - Differential Lock Circuit Fault With Switch ON, Repair
CCU 085 - MFWD Control Switch Error, Repair
CCU 086 - MFWD Circuit Fault With Switch OFF, Repair
CCU 093 - Clutch Cooling Solenoid Circuit Failure
CCU 094 - Fuel Advance Solenoid Circuit Failure
CCU 101 - Clutch Cooling Not Allowed
CCU 102 - HMS Not Allowed
CCU 103 - HMS Disabled w/Towed Implement Mode Active
CCU 104 - Remote PTO Operation Not Allowed
CCU 105 - Self-Canceling Turn Signals Not Allowed
CCU 255 - Phantom Code
Group 10: HCU
HCU 022 - Battery Voltage Out of Range, Repair
HCU 027 - Calibration Not Successful, Repair
HCU 028 - Calibration Memory Failure, Repair
HCU 029 - Calibration Selected For Less Than 30 Seconds, Repair
HCU 041 - Pressure Valve Solenoid Circuit, Repair
HCU 042 - Return Valve Solenoid Circuit, Repair
HCU 043 - Pressure Valve Solenoid Circuit, Repair
HCU 044 - Return Valve Solenoid Circuit, Repair
HCU 045 - Sensor Supply Voltage Out of Range, Repair
HCU 049 - Raise/Lower Rocker Switch Circuit, Repair
HCU 050 - HCU Failure, Repair
HCU 052 - Draft Sensor Circuit, Repair
HCU 053 - Load/Depth Control Potentiometer Circuit, Repair
HCU 054 - Hitch Control Lever Potentiometer Circuit, Repair
HCU 055 - Hitch Position Feedback Sensor Circuit, Repair
HCU 056 - Raise Limit Control Potentiometer Circuit, Repair
HCU 057 - Rate-of-Drop Control Potentiometer Circuit, Repair
HCU 058 - External Raise/Lower Switch Circuit, Repair
Group 15: LHP
LHP 022 - Battery Voltage Out of Range, Repair
LHP 027 - Calibration Not Successful, Repair
LHP 028 - Calibration Memory Failure or Never Calibrated, Repair
LHP 029 - Calibration Selected For Less Than 30 Seconds, Repair
LHP 045 - Sensor Supply Voltage Out of Range, Repair
LHP 050 - Row-Trak Control Unit Failure, Repair
LHP 054 - Position Control Circuit, Repair
LHP 055 - Pivot Angle Circuit, Repair
LHP 056 - Response Rate Control Circuit, Repair
LHP 057 - Row Sensor Circuit, Repair
LHP 058 - Row Sensor Raise Circuit, Repair
LHP 059 - Row Sensor Lower Circuit, Repair
LHP 060 - CCD Communication Line Failure, Repair
LHP 141 - Extend Valve Solenoid Circuit, Repair
LHP 142 - Retract Valve Solenoid Circuit, Repair
LHP 143 - Extend Valve Solenoid Circuit, Repair
LHP 144 - Retract Valve Solenoid Circuit, Repair
Group 20: PCU
PCU 008 - Manifold Absolute Pressure Sensor Out of Range, Repair
PCU 011 - Oil Temperature Is Cold For Proper Input Planetary Operation, Repair
PCU 012 - Oil Pressure Is Low For Proper Input Planetary Operation, Repair
PCU 016 - Excessive Engine Oscillation During Calibration, Repair
PCU 018 - Fault Detected In Diagnostic Mode, Repair
PCU 019 - PCU Not Calibrated For 30 km/h-40 km/h Speed, Repair
PCU 027 - Transmission Not Calibrated, Repair
PCU 028 - B4 Element Not Calibrated, Repair
PCU 030 - Clutch Engaged and Disengaged Switch Conflict (Both Closed), Repair
PCU 031 - Both Clutch Engaged and Disengaged Switches Open For Too Long (“Riding the Clutch”), Repair
PCU 038 - EOL Data Error, Repair
PCU 039 - Reverse Enable Circuit Fault, Repair
PCU 040 - Forward Enable Circuit Fault, Repair
PCU 041 - Forward and Reverse Enable Circuit Conflict (Both Enabled), Repair
PCU 042 - Command Conflicts With Enable Circuit (Reverse Commanded/Forward Enabled), Repair
PCU 043 - Command Conflicts With Enable Circuit (Forward Commanded/Reverse Enabled), Repair
PCU 044 - Command Conflicts With Enabled Circuit (Forward or Reverse Commanded/Transmission Not Enabled), Repair
PCU 045 - Command Conflicts With Enabled Circuit (Neutral or Park Commanded/Transmission IS Enabled), Repair
PCU 047 - Shift Lever Between “N' and “1F” or “1R” Too Long, Repair
PCU 050 - No Tractor Motion-Engine OFF, Repair
PCU 051 - No Tractor Motion-Engine Running, Repair
PCU 058 - Tractor Moved During Calibration, Repair
PCU 065 - PCU Fault (Checksum Error), Repair
PCU 066 - Key Switch ON with Transmission in Gear, Repair
PCU 067 - Transmission Enable Circuit Fault, Repair
PCU 068 - Gear Command Fault
PCU 069 - Calibration Failure, Repair
Section 212: Observable Symptoms
Group 10: Brakes
Brakes Function Erratically
Group 20: Hitch
Hitch only moves with External Switch
Group 30: Operators Station
Digital Tachometer Display Not Functioning
Poor AM & FM Radio Reception or Electrical Noise
Key Switch Won't Return to Run Position
Group 70: Hydraulics
Grapple Valve Holds System Pressure Above Standby for Several Seconds
Section 220: Engine Operation and Tests
Group 05: General Information
Engine Operation and Tests
Section 230: Fuel, Air Intake and Engine Cooling Systems
Group 20: Fuel/Air/Cooling System Theory of Operation
Fuel System
Air Intake System
Engine Cooling System
Section 240: Electrical Operation and Tests
Group 04: Diagnostic Codes and Addresses
Diagnostic Codes and Addresses
Diagnostic Codes
CCU Diagnostic Code Numbers
HCU Diagnostic Code Numbers
LHP Diagnostic Code Numbers
PCU Diagnostic Code Numbers
CCU Addresses
HCU Addresses
LHP Addresses
PCU Addresses
PRF Addresses
Group 05: Electrical System Information
Service Equipment and Tools
Other Material
Specifications
Using Electrical Section
Wiring Diagram and Schematic Information
Electrical Schematic Symbols
Reading a System Functional Schematic
Reading a Wiring Diagram
Reading a Diagnostic Schematic
Visually Inspect Electrical System
Seven Step Electrical Test Procedure
Electrical Circuit Malfunctions
High Resistance or Open Circuit
Grounded Circuit
Shorted Circuit
Understanding Electrical vs. Electronic Circuit Voltage Test Readings
Intermittent Electronic Problems
Group 10: System Diagrams
Component Identification Legend