John Deere Self-Propelled Hay and Forage Windrower 4890 Diagnosis and Tests Service Manual (TM1781)
John Deere Self-Propelled Hay and Forage Windrower 4890 Diagnosis and Tests Service Manual (TM1781)
TM1781 - John Deere Self-Propelled Hay and Forage Windrower 4890 Technical Manual (Diagnosis and Tests).PDF
Complete Diagnostics and Tests manual with electrical wiring diagrams for John Deere Self-Propelled Hay and Forage Windrower 4890, with all the shop information to maintain, diagnose, rebuild like professional mechanics.
John Deere 4890 Self-Propelled Hay and Forage Windrower workshop Operation & Tests 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: 1,265 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English
MAIN SECTIONS
Foreword
Safety Information
Safety
Engine
Diagnostic Information
Fuel/Air Systems
Diagnostic Information
Electrical System
Theory of Operation
System Information
Electrical Diagrams
Diagnosing Electrical System Malfunctions
Power Supply Circuits Tests
Starting System Tests
Charging System Tests (120 Amp)
Ground Speed Control System Diagnostics
Lighting System Tests
Platform Control Systems Tests
Machine Monitor System Tests
Fuel Control Tests
Heating and Air Conditioning Tests
Cab Accessories Circuits Tests
Air Seat Systems Tests
Miscellaneous Tests
Power Train
General Information
System Operational Checks
Diagnostic Information
Hydrostatic System Schematic And Symbols
Tests
Theory of Operation and Component Location
Steering and Brakes
System Operational Checks
Diagnostic Information
Adjustments
Theory Of Operation
Hydraulic System
General Information
System Operational Checks
Diagnostic Information
Hydraulic System Schematic And Symbols
System Tests and Adjustments
Theory of Operation
Operator Station
General Information
System Operational Checks
Diagnostics
Tests
Adjustments
Theory of Operation
Dealer Fabricated Tools
Dealer Fabricated Tools
tm1781 - 4890 self-propelled windrower
Table of Contents
Foreword
Section 210: Safety Information
Group 05: Safety
Recognize Safety Information
Understand Signal Words
Follow Safety Instructions
Handle Fluids Safely-Avoid Fires
Prevent Battery Explosions
Prepare For Emergencies
Prevent Acid Burns
Handle Chemical Products Safely
Avoid High-Pressure Fluids
Park Windrower Safely
Stay Clear of Rotating Driveline
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
Service Tires Safely
Remove Paint Before Welding or Heating
Avoid Heating Near Pressurized Fluid Lines
Avoid Harmful Asbestos Dust
Use Proper Tools
Dispose of Waste Properly
Practice Safe Maintenance
Live With Safety
Practice Safe Service Procedures
Section 220: Engine
Group 10: Diagnostic Information
Diagnose Engine Malfunctions-Use CTM104
Section 230: Fuel/Air Systems
Group 10: Diagnostic Information
Diagnose Fuel and Air Systems Malfunctions-Use CTM104
Section 240: Electrical System
Group 05: Theory of Operation
Starting System Operation
Charging System Operation
Engine Speed Adjustment Operation
Fuel Shut-Off Circuit Operation
Ground Drive Operation-Hydro Lever In Neutral; Field/Road Switch In Road (Rabbit) Position
Ground Drive Operation-Hydro Lever In Neutral; Field/Road Switch In Field (Turtle) Position
Ground Drive Operation-Hydro Lever Out Of Neutral; Field/Road Switch In Road (Rabbit) Position
Ground Drive Operation-Hydro Lever Out Of Neutral; Field/Road Switch In Field (Turtle) Position
Platform Drive Operation-Forward
Platform Drive Operation-Reverse
Platform Operation-Lower/Raise
Platform Operation-Float and Tilt
Reel Speed Increase/Decrease Operation
Machine Monitor Operation-Warning Display Panel Stop Indicators
Machine Monitor Operation-Warning Display Panel Service Indicators
Machine Monitor Operation-Bulb Test
Machine Monitor Operation-Gauges
Machine Monitor Operation-Digital Display
Cab Accessory Operation-Windshield Wiper And Horn(Serial No. -150000)
Cab Accessory Operation-Windshield Wiper And Horn(Serial No. 150001- )
Cab Accessory Operation-Dome Lamp And Radio(Serial No. -150000)
Cab Accessory Operation-Dome Lamp And Radio(Serial No. 150001- )
Rotary Wand Air Screen
Air Conditioning System Electrical Operation
Pressurizer and Blower Motor Operation
Lighting System Operation-Daytime Running Lights
Lighting System Operation-Light Switch in 1ST Position (Warning Lamps)
Lighting System Operation-Light Switch in 2ND Position (Road Lamps)
Lighting System Operation-Light Switch in 3RD Position (Field Lamps)
Lighting System Operation-Light Switch in 4TH Position (Additional Field Lamps)
Lighting System Operation-Turn Signals
Group 10: System Information
Multimeter
Fuse and Relay Panel (Power Center)(Serial No. -150000)
Fuse and Relay Panel (Power Center)(Serial No. 150001- )
Fuse, Circuit Breaker, And Relay Information
Battery Operation
Diagnose Battery Malfunctions
Using Booster Batteries-12 Volt System
Visually Inspect Electrical System
Electrical Circuit Malfunctions
High Resistance Circuit
Open Circuit
Grounded Circuit
Shorted Circuit
Seven-Step Electrical Test Procedure
Wiring Diagram and Schematic Information
Reading A System Functional Schematic
Electrical Schematic Symbols
Component Identification Table
Wire Color Chart
Group 15: Electrical Diagrams
Electrical Component Identification and Location
Ground Point Locations
Legend For Electrical Schematic (Serial No. -150000)
Legend For Electrical Schematic (Serial No. 150001- )
Group 20: Diagnosing Electrical System Malfunctions
Starting Circuit
Engine Speed Adjust
Ground Drive
Parking Brake/Steering Release
Daytime Running Lights
Lighting
Platform Drive
Reel Speed Adjust
Platform Lower/Raise
Platform Float
Platform Tilt
Warning Display Indicators
Cornerpost Gauges
Digital Tach
Alternator/Battery
Relay/Circuit Breaker Panel
Rotating Wand
Heating and A/C
Group 25: Power Supply Circuits Tests
Power Supply Circuits Tests(Serial No. -150000)
Power Supply Circuits Tests(Serial No. 150001-)
Group 30: Starting System Tests
Essential or Recommended Tools
Service Equipment and Tools
Starting Circuit Operational Information
Test Battery-Conventional
Test Battery-"New Dimension" Or Maintenance Free
Test Start Relay
Group 35: Charging System Tests (120 Amp)
Brief Description
Basic Operation
Detailed Description
120 Amp Alternator Diagnostics
Group 40: Ground Speed Control System Diagnostics
Ground Speed Control System Diagnostics
Group 45: Lighting System Tests
Lighting System Circuit Tests-Introduction
Group 50: Platform Control Systems Tests
Platform Control Systems Tests
Group 55: Machine Monitor System Tests
Machine Monitor System Tests
Group 60: Fuel Control Tests
Fuel Control Tests
Group 65: Heating and Air Conditioning Tests
Heating and Air Conditioning Tests
Group 70: Cab Accessories Circuits Tests
Cab Accessories Circuits
Group 75: Air Seat Systems Tests
Air Seat Systems Tests
Group 80: Miscellaneous Tests
Miscellaneous Tests
Section 250: Power Train
Group 00: General Information
General Information Specifications
Specifications
Hydraulic System Cleanliness
Hydraulic System Cautions
Drain Hydraulic Reservoir
Group 05: System Operational Checks
Preliminary Checks
Group 10: Diagnostic Information
Diagnose Malfunctions of Ground Drive System
Group 15: Hydrostatic System Schematic And Symbols
Hydraulic Symbols
Hydrostatic System Schematic
Group 20: Tests
Essential or Recommended Tools
Service Equipment and Tools
Specifications
Test Ground Drive Pump Relief Valve Pressure
Test Ground Drive Pump Case Drain Flow
Test Ground Drive Motor Case Drain Flow
Group 25: Theory of Operation and Component Location
Power Train Operation and Component Location
Ground Drive Pump-Neutral Operation
Ground Drive Pump-Forward Operation
Ground Drive Pump-Reverse Operation
Ground Drive Pump-Relief Valve Operation
Ground Drive Motor Operation
Priority Valve Operation
Power Wheel Operation
Section 260: Steering and Brakes
Group 05: System Operational Checks
System Operational Checks
Group 10: Diagnostic Information
Steering Malfunction
Brakes Malfunction
Group 15: Adjustments
Service Equipment and Tools
Specifications
Adjust Ground Drive Neutral
Neutral Steer Adjustment
Adjust Ground Drive Motor Displacement
Adjust Steering Centering Spring
Group 20: Theory Of Operation
Steering/Ground Speed Operation (Serial No. -130174)
Steering/Ground Speed Operation (Serial No. 130175-)
Park Brake Operation
Section 270: Hydraulic System
Group 00: General Information
General Information Specifications
Essential or Recommended Tools
Specifications
Hydraulic System Cautions
Hydraulic Accumulator
Charge Float System Accumulator
Hydraulic System Cleanliness
Drain Hydraulic Reservoir
Group 05: System Operational Checks
Preliminary Checks
Group 10: Diagnostic Information
Diagnose Platform Hydraulic System Malfunctions
Diagnose Platform Drive System Malfunctions
Group 15: Hydraulic System Schematic And Symbols
Hydraulic Symbols
Hydraulic Schematic
Group 20: System Tests and Adjustments
Essential or Recommended Tools
Service Equipment and Tools
Specifications
Test Charge Pressure
Test Auxiliary System Relief Valve Pressure
Test Auxiliary-Charge Pump Flow
Platform Drive Pump Relief Pressure
Test Platform Drive Pump Case Drain Flow
Test Platform Drive Motor Case Drain Flow
Platform Drive Pump-Neutral Adjustment
Group 25: Theory of Operation
Hydraulic System Operation and Component Location
Auxiliary-Charge Pump Operation
Platform Drive Pump-Forward Operation
Platform Drive Pump-Reverse Operation
Platform Drive Pump-Relief Valve Operation
Platform Drive Motor Operation
Platform Forward and Reverse Solenoid Valve Operation
High Pressure Valve Description
Platform Tilt Circuit Operation
Platform Raise/Lower Circuit Operation
Platform Float Circuit Operation
Platform Open-Center And Relief Circuit Operation
Section 290: Operator Station
Group 00: General Information
R134a Refrigerant Safety Precautions
R134a Refrigerant Cautions
Proper Refrigerant Handling
Air Conditioning Component Location
Heater System Component Location
Group 05: System Operational Checks
Air Conditioning Operational Checks
Group 10: Diagnostics
Other Material
Air Conditioning Diagnostic Information
Group 15: Tests
Essential or Recommended Tools
Service Equipment and Tools
Specifications
Inspect Refrigerant Hoses and Tubing
Pressure Diagnostic Chart
Pressure/Temperature Chart
Test System Pressures
Expansion Valve Bench Test
Low Pressure Switch Test
High Pressure Switch Test
A/C Thermostat Switch Test
Test System For Leaks
Group 20: Adjustments
Adjust Heater Control Cable
Group 25: Theory of Operation
Electrical System Operation of Fans and Air Conditioning
Refrigerant System Cycle Operation
R134a Refrigerant Theory Of Operation
Receiver/Dryer Operation
Expansion Valve Operation
Compressor Relief Valve Operation
Temperature Control Operation
A/C And Heater Air Flow Operation
High Pressure Switch Operation
Low Pressure Switch Operation
Heater System Operation
Section 299: Dealer Fabricated Tools
Group 05: Dealer Fabricated Tools
DFEX1781A Platform Drive Pump Lock-Up Tool
