John Deere 4425 Combines Technical Manual (TM4417)

Illustrated factory Technical Manual for John Deere Combines Models 4425.

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

Covered Models:
   4425

Format: PDF, 874 pages
Language: English
Publication Date: 01 Jun 1989
Table of Contents:
   INTRODUCTION
   GENERAL
      General Specifications
      Diagnosing and Testing Procedures
      Tune-Up and Adjustment
      Clamping Ring Bearings
      Drive Belts
      Drive Chains
   ENGINE--REPAIR
      Engine Removal and Installation
      Cooling System
   FUEL AND AIR INTAKE SYSTEM REPAIR
      Air Intake and Exhaust Sytems
      Diesel Fuel System
      Engine Speed Controls
   ELECTRICAL SYSTEM--REPAIR
      Wiring Harnesses and Connectors
      Starting Motor
      Alternator
      System Components
      Low Shaft Speed Monitor
      HARVESTRAK Combine Monitor
   POWER TRAIN--REPAIR
      POSI-TORQ Ground Drive--Upper Unit
      POSI-TORQ Ground Drive--Lower Unit
      Engine Clutch Operation
      Engine Clutch
      Four-Speed Transmission
      Final Drives
   STEERING, BRAKES/REAR AXLE--REPAIR
      Power Steering
      Rear Axle and V-Support
      Parking Brake
      Brake Operation
      Foot Brakes
   HYDRAULIC SYSTEM--REPAIR
      Hydraulic Oil Reservoir and Lines
      Main Hydraulic Pump
      Main Hydraulic Control Valve
      Hydraulic Cylinders
      Hydraulic Accumulator/Header Pressure Gauge
      Hydraulic Reel Drive System
      Feeder Reverser Motor
   SEPARATOR SHELL--REPAIR
      Separator Shell
      Front Axle
   OPERATOR'S PLATFORM WITH CAB--REPAIR
      Air Conditioning--Compressor
      Air Conditioning System Components
      System Service and Tests
      Cab Ventilation System
      Cab Heating System
      Operator's Seat
      Operator's Cab
   HEADERS--REPAIR
      Series Cutting Platform
      Series Corn Head
      A Series Row-Crop Head
   HEADER AND FEEDER DRIVES--REPAIR
      Header and Feeder Drives
      Header and Feeder Drives
      Hydraulic Reverser
   SEPARATOR/CLEANING UNIT--REPAIR
      Separator Drive
      Threshing Cylinder Variable Drive
      Cylinder Drive Reduction Gear
      Threshing Cylinder
      Concave
      Beater Variable Drive
      Beater
      Straw Walkers
      Chaffer and Sieves
      Cleaning Fan
      Straw Chopper
      Straw Spreader
   ELEVATORS, GRAIN TANK AND UNLOADING AUGERS--REPAIR
      Tailings, Augers and Elevator
      Clean Grain Auger and Elevator
      Grain Tank Leveling and Unloading Augers
      Outer Unloading Auger and Housing
   DIAL-A-MATIC HEADER HEIGHT CONTROL--REPAIR
      Electrical System
      Hydraulic System
   ENGINE--OPERATION AND TESTS
      Cooling System
   FUEL AND AIR INTAKE SYSTEM--OPERATION AND TESTS
      Air Intake System
      Diesel Fuel System
   ELECTRICAL SYSTEM--OPERATION AND TESTS
      General Testing, Wiring Charts and Diagrams
      Starting Motor
      Alternator
      Low Shaft Speed Monitor
      HARVESTRAK Combine Monitor
   POWER TRAIN--OPERATION AND TESTS
      POSI-TORQ Ground Drive
      Clutch Control
      Clutch
      Four-Speed Transmission
   POWER STEERING AND BRAKES--OPERATION AND TESTS
      Power Steering--Operation
      Power Steering--Diagnosing Malfunctions
      Power Steering--Tests
   HYDRAULIC SYSTEM--OPERATION AND TESTS
      Hydraulic System--Function Flow Diagrams
      Diagnosing Malfunctions
      Hydraulic Circuit--Testing
   OPERATOR'S PLATFORM WITH CAB--FUNCTION AND TESTS
      Air Conditioning System
      Air Conditioning System Tests
      Cab Ventilation System
      Cab Heating System
   DIAL-A-MATIC HEADER HEIGHT CONTROL--OPERATION AND TESTS
      General Information--Diagnosis and Tests
      Electrical System
      Hydraulic System
      Mechanical System

Covered
Models	4425