John Deere 4990 Self-Propelled Windrowers Diagnostic Manual (TM1820)

Table of Contents:
   Introduction
      Foreword
      Service Technician Response
   Safety Information
      Safety
   Engine
      Diagnostic Information
   Fuel/Air Systems
      Diagnostic Information
   Electrical System Diagnosis and Test (Serial No. -163100)
      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
   Electrical System Diagnosis and Test (Serial Number 163101 - )
      How To Use This Diagnostic Information
      Test And Adjustments
      Air Condition and Heat Diagnostics
      Armrest - Float Pressure Diagnostics
      Armrest - Field/Road Shift (Running Lights) Diagnostics
      Armrest - Platform Engage Diagnostics
      Armrest - Throttle Control Diagnostics
      Auxiliary Power Diagnostics
      Charging Diagnostics
      COMFORT COMMAND Seat Diagnostics
      Gauges - Engine Temperature and Fuel Level Diagnostics
      Horn Diagnostics
      Hydro Handle - Raise/Lower Diagnostics
      Hydro Handle - Reel/Platform Speed Diagnostic
      Hydro Handle - Platform Tilt Diagnostics
      Lighting System - Dome and Console Light Diagnostics
      Lighting System - Field Lights Diagnostics
      Lighting System - Hazard Lights Diagnostics
      Lighting System - Overall Diagnostic
      Lighting System - Road/Running Lights Diagnostics
      Lighting System - Turn Signal Diagnostics
      Lighting System - Work Lights Diagnostics
      Park Brake Diagnostics
      Power Distribution Diagnostics
      Radio Diagnostics
      Rotating Wand Diagnostics
      Starting System Diagnostics
      Tachometer - Engine Speed and Hourmeter Diagnostics
      Tachometer - Float Pressure Diagnostics
      Tachometer - Ground Speed/Park Brake Diagnostics
      Tachometer - Overall Diagnostics
      Tachometer - Platform Speed and Hourmeter Diagnostics
      Warning Display Panel - Alternator Diagnostics
      Warning Display Panel - Engine Air Filter Diagnostics
      Warning Display Panel - Engine Oil Pressure Diagnostics
      Warning Display Panel - Engine Temperature Diagnostics
      Warning Display Panel - Float Pressure Warning Diagnostics
      Warning Display Panel - Hydraulic Oil Filter Diagnostics
      Warning Display Panel - Hydrostatic Charge Pressure Low Diagnostics
      Warning Display Panel - Hydrostatic Oil Temperature Diagnostics
      Warning Display Panel - Low Fuel Diagnostics
      Warning Display Panel - Operator Presence
      Warning Display Panel - Overall Diagnostics
      Warning Display Panel - Park Brake Diagnostics
      Warning Display Panel - Road Shift Engage Light Diagnostics
      Wiper Diagnostics
      Connector Information (end views, numbers, location photos)
   Power Train Diagnosis and Test
      General Information
      Tests and Adjustments
      Power Train Diagnostics
      Range Shift Diagnostics
      Steering and Brake Release Diagnostics
      Final Drive Diagnostics
      Component Location
   Steering and Brakes Diagnosis and Test
      General
      Tests and Adjustments
      Steering System/Ground Speed Diagnostics
      Park Brake Diagnostics
   Hydraulic System Diagnosis and Test
      General Information
      Tests and Adjustments
      General Hydraulic System Diagnostics
      Priority Valve Diagnostics
      Open Center Circuit Diagnostics
      Platform Raise/Lower Diagnostics
      Platform Tilt Diagnostics
      Platform Float System Diagnostics
      Platform Drive Diagnostics
      Auxiliary-Charge Pump Diagnostics
      Component Location
   Operator Station (Serial No. -163100)
      General Information
      System Operational Checks
      Tests and Adjustments
      Diagnostics
      Adjustments
      Theory of Operation
   Operator Station Diagnosis and Test (Serial No. 163101-)
      Air Conditioning General Information
      Tests and Adjustments
      Air Conditioning and Heater Diagnostics
      Component Location