John Deere 120C Excavator Operation & Test Technical Manual TM1934 - Diagnostic, Electrical Wiring Diagrams, Troubleshooting PDF - MJODTM1934.zip
Operation & Test Technical Manual for the John Deere 120C Excavator (TM1934)
TM1934 - John Deere 120C Excavator Operation & Test Service Manual.pdf
Complete Technical Diagnostic, Operation and Test Manual with Electrical Wiring Diagrams for John Deere 120C Excavators, with all the shop information to maintain, diagnose, service, rebuild like professional mechanics.
John Deere Excavator 120C 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.
Total Pages: 629 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English
MAIN SECTIONS
Foreword
Technical Information Feedback Form
General Information
Safety
Diagnostics
Main Controller (MCZ) Diagnostic Trouble Codes
Engine Control Unit (ECU) Diagnostic Trouble Codes
Monitor Controller (DSZ) Diagnostic Trouble Codes
Air Conditioner Controller (ACF) Diagnostic Trouble Codes
Operational Checkout Procedure
Operational Checkout Procedure
Engine
Theory of Operation
Diagnostic Information
Adjustments
Tests
Electrical System
System Information
System Diagrams
Sub-System Diagnostics
Monitor Operation
References
Power Train
Theory of Operation
Diagnostic Information
Hydraulic System
Theory of Operation
Diagnostic Information
Tests
Heating and Air Conditioning
Theory of Operation
Diagnostic Information
Tests
Dealer Fabricated Tools
tm1934 - 120C Excavator
Table of Contents
Foreword
Technical Information Feedback Form
Section 9000: General Information
Group 01: Safety
Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine Modifications
Add Cab Guarding for Special Uses
Inspect Machine
Stay Clear of Moving Parts
Avoid High-Pressure Oils
Beware of Exhaust Fumes
Prevent Fires
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator's Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Use Special Care When Lifting Objects
Add and Operate Attachments Safely
Park and Prepare for Service Safely
Service Cooling System Safely
Remove Paint Before Welding or Heating
Make Welding Repairs Safely
Drive Metal Pins Safely
Section 9005: Operational Checkout Procedure
Group 10: Operational Checkout Procedure
Operational Checkout
Section 9010: Engine
Group 05: Theory of Operation
Engine Speed Control System Operation
Group 15: Diagnostic Information
Diagnose Engine Malfunctions
Group 25: Tests
Engine Speed Test
Fuel Line Leakage Test
Engine Power Test Using Turbocharger Boost Pressure
Section 9015: Electrical System
Group 05: System Information
Electrical Diagram Information
Group 10: System Diagrams
Explanation of Wire Markings
Fuse Specifications
Functional Schematic, Wiring Diagram, and Component Location Master Legend
System Functional Schematic
Overall Machine Harnesses Component Location
Cab Harness (W1) Component Location
Cab Harness (W1) Wiring Diagram
Machine Harness (W2) Component Location
Machine Harness (W2) Wiring Diagram
Monitor Harness (W3) Component Location
Monitor Harness (W3) Wiring Diagram
Air Conditioner Harness (W9) Component Location
Air Conditioning Harness (W9) Wiring Diagram
Pump Harness (W12) Component Location
Pump Harness (W12) Wiring Diagram
Engine Control Unit Harness (W19) Component Location
Engine Control Unit Harness (W19) Wiring Diagram
Engine Harness (W20) Component Location
Engine Harness (W20) Wiring Diagram
Group 15: Sub-System Diagnostics
Starting and Charging Circuit Theory of Operation
Monitor Controller and Display Circuit Theory of Operation
Engine Control Unit Circuit Theory of Operation
Propel Alarm Circuit Theory of Operation
Pump and Valve Controller Circuit Theory of Operation
Windshield Wiper and Washer Circuit Theory of Operation
Air Conditioner Controller Circuit Theory of Operation
Group 20: References
Excavator Diagnostic Program General Description and Overview
Monitor Data Items
Reading Pump and Valve Controller Diagnostic Trouble Codes Without Laptop Computer
Pump and Valve Controller Diagnostic Trouble Codes
Reading Engine Diagnostic Trouble Codes Without Laptop Computer
Engine Diagnostic Trouble Codes
Monitor Controller And Display Diagnostic System Operation
Alternator Test Procedure
Fuse Test
Relay Test
Pressure Sensor Test
Solenoid Test
Temperature Sensor Test
Speed Sensor Test
Electrical Component Checks
Engine Control Unit Remove and Install
Pump and Valve Controller Remove and Install
Battery Remove and Install
Propel Alarm Cancel Switch Remove and Install
Key Switch Remove and Install
Propel Alarm Remove and Install
Windshield Wiper Enable Switch Remove and Install
Rear Cover Remove and Install
Switch Panel (A4) Remove and Install
Monitor Controller and Display (A5) Remove and Install
Disconnect Tab Retainer Connectors
Disconnecting Spring Wire Clip Connectors
Replace DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Connectors
Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contacts
Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector
Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contacts
Remove Connector Body from Blade Terminals
Section 9020: Power Train
Group 05: Theory of Operation
Track Adjuster and Recoil Spring Operation
Propel Gearbox Operation
Group 15: Diagnostic Information
Diagnose Undercarriage Components Malfunctions
Measure Swing Bearing Wear
Section 9025: Hydraulic System
Group 05: Theory of Operation
Hydraulic System Diagram and Operation
Pilot System Diagram and Operation
Pilot Pump, Pressure Regulating Valve, and Filter Operation
Pilot Shut-Off Valve Operation
Pilot Controller Operation
Propel Pilot Controller Operation
Pilot Operation of Control Valve Operation
Pilot Signal Manifold Operation
Hydraulic Pump Operation
Hydraulic Pump Regulator Operation
Engine Speed Sensing Control Circuit Operation
Control Valve Operation
Control Valve Check Valves Identification and Operation
System Relief Valve Operation
Circuit Relief and Anti-Cavitation Valve Operation
Propel Flow Combiner Valve Operation
Auxiliary Flow Combiner Valve and Bypass Shut-Off Valve Operation
Arm Regenerative Valve Circuit Operation
Bucket and Boom Regenerative Valve Circuit Operation
Boom and Arm Reduced Leakage Valves Operation
Bucket and Auxiliary Flow Rate Valve Circuit Operation
Propel and Arm In Combined Operation
Swing and Boom Up Combined Operation
Swing Gearbox Operation
Swing Motor, Crossover Relief, Cushion, and Make-Up Valve Operation
Swing Motor Park Brake Release Circuit Operation
Backfill Blade Circuit Operation
Rotary Manifold With Backfill Blade Function Operation
Rotary Manifold Operation
Propel Motor and Valve Housing Operation
Propel Motor Speed Circuit Operation
Hydraulic Cylinder Operation
Hydraulic System Circuit Symbols
Hydraulic System Schematic
Group 15: Diagnostic Information
Diagnose Hydraulic System Malfunctions
Diagnose Pilot Circuit Malfunctions
Diagnose Dig Circuit Malfunctions
Diagnose Swing Circuit Malfunctions
Diagnose Propel System Malfunctions
Control Valve and Solenoid Valve Manifold Line Identification
Swing Motor Line Identification
Pump 1, Pump 2, and Pilot Pump Line Identification
Propel Hydraulic System Line Identification
Pilot Controllers-to-Pilot Signal Manifold Component Location—Excavator Pattern
Pilot Controllers-to-Pilot Signal Manifold Component Location—Backhoe Pattern
Pilot Signal Manifold-to-Control Valve Component Location
Backfill Blade Hydraulic System Component Location
Group 25: Tests
JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
JT02156A Digital Pressure/Temperature Analyzer Installation
Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy
Hydraulic System Warm-Up Procedure
Cylinder Drift Test—Arm, Boom, and Bucket
Pilot Pressure Regulating Valve Test and Adjustment
Control Valve Spool Actuating Pilot Pressure Test
System Relief Valve Test and Adjustment
Circuit Relief Valve Test and Adjustment
Backfill Blade System Relief Valve Test and Adjustment
Backfill Blade Circuit Relief Valve Test and Adjustment
Swing Motor Crossover Relief Valve Test and Adjustment
Propel Motor Crossover Relief Valve Test and Adjustment
Propel Speed and Arm Regenerative Solenoid Valve Test and Adjustment
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow
Hydraulic Pump Regulator Test and Adjustment—Engine Pulldown
Hydraulic Pump Flow Test
Swing Motor Leakage Test
Propel Motor Leakage Test
Section 9031: Heating and Air Conditioning
Group 05: Theory Of Operation
Air Conditioning System Cycle Of Operation
Group 15: Diagnostic Information
Diagnose Air Conditioning System Malfunctions
Diagnose Heater System Malfunctions
Diagnose Air Conditioning Diagnostic Trouble Codes
Heating and Air Conditioning Component Location Diagram
Group 25: Tests
Heating and Air Conditioning System Checks
R134a Air Conditioning System Test
Air Conditioning Compressor Clutch Test
Refrigerant Leak Test
Refrigerant Hoses and Tubing Inspection
Air Conditioner Compressor Belt Test and Adjustment
Fresh Air Filter and Recirculating Air Filter Remove and Install
Section 9900: Dealer Fabricated Tools
Group 99: Dealer Fabricated Tools
DFT1236 Split Flange Hose Cap