John Deere 6120, 6120L, 6220, 6220L, 6320, 6320L, 6420, 6420L and 6520L Tractors (North America) Operation and Test Manual (TM4646)

Illustrated factory Operation and Test Manual for John Deere Tractors Models 6120, 6120L, 6220, 6220L, 6320, 6320L, 6420, 6420L and 6520L.

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

Covered Models (North America):
   6120
   6120L
   6220
   6220L
   6320
   6320L
   6420
   6420L
   6520L

Format: PDF, 2257 pages
Language: English
Publication Date: 08 Dec 2005
Table of Contents:
   Introduction
      Foreword
      Version date
   GENERAL INFORMATION
      Safety Measures
      General References
   ENGINE
      Operational Check-Out
      Tests and Adjustments
   FUEL, AIR INTAKE AND COOLING SYSTEMS
      Tests and Adjustments
      Operation
   ELECTRICAL SYSTEM
      Sub-System Diagnostics (Cab)
      Sub-System Diagnostics (Open Operator`s Station)
      Component Tests
      Functional Schematics (AutoPowr/IVT Transmission)
      Functional Schematics (PowrQuad Plus, AutoQuad and AutoQuad Plus Transmissions)
      Functional Schematics (Open Operator`s Station)
      Summary of Wiring Harnesses
      Wiring Harnesses
      Wiring Harnesses (Continued)
      Wiring Harnesses from Serial Number 398656
      Wiring Harnesses from Serial Number 398656 (Continued)
   ELECTRONIC CONTROL UNITS
      Operation and General Information on Diagnostics
      Data BUS Systems, Theory of Operation
      ATC - Automatic Temperature Control Unit
      BCU - Basic Control Unit
      BIF - Basic Informator
      ECU - Engine Control Unit
      EPC - Control Unit for PowrQuad Plus, AutoQuad and AutoQuad Plus Transmissions
      JDL Control Unit for JDLink
      PLC - Park Lock Controller
      PRF - Performance Monitor
      SFA - Control Unit for Front-Wheel Drive Axle and Cab Suspension
      SIC - Control Unit for Electrically Actuated Selective Control Valves
      SSU - Control Unit for AutoTrac
      TCU - Control Unit for AutoPowr/IVT Transmission
      TEC - Control Unit for Tractor Equipment Interface
      UIC - User Interface Controller
      UIM - User Interface Module, Keyboard for ISOBUS Display
   SYNCROPLUS TRANSMISSION
      Introductory Checks
      Operational Check-Out
      Tests and Adjustments
      Operation
   POWER REVERSER TRANSMISSION
      Operational Check-Out
      Tests and Adjustments
      Operation
   AUTOPOWR/IVT TRANSMISSION
      Operational Check-Out
      Tests and Adjustments
      Operation
   POWRQUAD, POWRQUAD PLUS, AUTOQUAD AND AUTOQUAD PLUS TRANSMISSIONS
      Operational Check-Out
      Tests and Adjustments
      Operation
   DRIVE SYSTEMS
      Operational Check-Out
      Tests and Adjustments
      Operation
   STEERING AND BRAKES
      Introductory Checks
      Operational Check-Out
      Tests and Adjustments
      Operation
   HYDRAULIC SYSTEM
      Operational Check-Out
      Tests and Adjustments
      Operation
   MISCELLANEOUS
      Operational Check-Out
      Tests and Adjustments
      Operation
   OPERATOR`S CAB
      Operational Check-Out
      Tests and Adjustments
      Operation
   SPECIAL TOOLS
      Special Tools (Dealer-Fabricated)
      Special Tools and Test Equipment