John Deere 340D, 440D Skidders and 448D Grapple Skidders Operation and Test Manual (TM1436)

Illustrated factory Operation and Test Manual for John Deere Skidders Models 340D, 440D and Grapple Skidders Models 448D.

This manual will assist you in diagnosing, and troubleshooting for your skidder, skidder or grapple skidder.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.

Covered Models:
   340D Skidder
   440D Skidder
   448D Grapple Skidder

Format: PDF, 246 pages
Language: English
Publication Date: 01 Jan 1988
Table of Contents:
   Introduction and Safety
   General Information
      General Specifications
      Torque Values
      Fuels and Lubricants
   Operational Checkout Procedure
      Operational Checkout Procedure
         Checks
   Engine Operation and Tests
      Diagnostic Information
         Make Visual Inspection of Engine Components
         Diagnose Engine Malfunctions
      Adjustments
         Adjustment
      Tests
         Test
   Electrical System Operation and Tests
      Theory of Operation
         Safety Precautions
         Prevent Fire Hazards When Using Booster Batteries
         Visually Inspect Electrical System
         Operation
      Diagnostic Information
         Electrical System Malfunctions
         Electrical Schematic
         Wiring Diagram
         Wiring Routing Description
         Electrical Schematic Symbols
      Tests
         Service Equipment and Tools
         Test
   Powertrain Operation and Tests
      Theory of Operation
         Operation
      Diagnostic Information
         Diagnose Malfunctions
      Adjustments
         Adjustments
   Hydraulic System Operation and Tests
      Theory of Operation
         Hydraulic System
         Transmission Oil System
         Transmission Filter Relief Valve
         Surge Relief Valve
         Main Hydraulic Pump
         Stroke Control Valve
         Differential Lock Valve
         Pressure Control Valve
         Brake Circuit
         Steering Valve
         Crossover Relief Valve
         Secondary Steering System
         Blade Control Circuit
         Grapple Boom Control Valve
         Circuit Relief Valve
         Grapple Boom Control Valve Anti-Cavitation
         Grapple Rotate Control Valve
         Grapple Valve
         Blade Control Valve and Grapple Control Valve End Plates
         Winch Control Valve
         Winch Warm-Up Circuit
         Park Brake
         Rotary Manifold
      Diagnostic Information
         Seven Basic Steps to Diagnose and Test the Hydraulic System
         Pretest Inspection and Operational Check of the Machine
         Diagnose Malfunctions
         Hydraulic Circuit Symbols
         Hydraulic Schematic
      Tests
         Tachometer/Temperature Reader Installation Procedure
         Hydraulic Oil Warm-Up Procedure
         Charge Pressure
         Surge Relief Valve Pressure
         Transmission Pump Flow
         Main Pump Standby Pressure
         Main Pump Flow
         Pressure Control Valve
         Steering System Leakage
         Steering Crossover Relief Valve Pressure
         Secondary Steering Valve Pressure
         Secondary Steering Accumulator Precharge Pressure
         Park Brake Accumulator Pressure
         Service Brake Accumulator Precharge Pressure
         Brake Bleed Hydraulic System
         Hydraulic System Leakage
         Hydraulic Component Leakage
         Winch System Pressure
         Differential Lock Valve Pressure
         Grapple Crossover Relief Valve Pressure
         System Relief Valve Pressure
         Circuit Relief Valve Test
         Oil Cooler Restriction Test
         Complete Transmission-Hydraulic System
         Specifications and Analysis
         Cycle Time Test