DOWNLOAD COMPLETE DIAGNOSIS AND TEST SERVICE MANUAL FOR JOHN DEERE 3420 LOADER | PUBLICATION NUMBER - TM8108
The TM8108 is the official John Deere service manual for the 3420 Loader, providing comprehensive diagnostic procedures and testing protocols. This technical resource covers systematic troubleshooting methods, component testing sequences, and detailed repair specifications essential for qualified technicians. Designed for in-depth maintenance and problem resolution, it delivers the precision guidance needed to identify and address loader malfunctions efficiently. Ideal for service centers and experienced operators requiring authoritative technical documentation.
CONTENT:
Foreword
Version Date
HYD - Diagnosis
HYD - Diagnosis
Engine
Tests and Troubleshooting
/Air Intake Systems - Tests
Air Intake System
Electrical System - General Information
General Information
Test Equipment
Electrical System – Tests (3215 and 3415) up to Serial No. 206800
Functional Schematics, Wiring and Harness Diagrams
Section 1: Starting Motor Power Supply
Section 2: Seat Adjustment
Section 3: Wiper/Washer System
Section 4: Heater/Air Conditioning System
Section 5: Radio, Cab Interior Light and Horn
Section 6A: Lights (Region II)
Section 6B: Lights (North America)
Section 7: Reverse Travel Alarm, Cab Electrical Socket
Section 8: Instruments
Section 9: Forward Stability Indicator (Load Monitor)
Section 10: Steering Modes
Section 11A: Power Train, Shuttle Shift Transmission Shift Transmission Section 12: Boom Control System
Section 13: Rear Auxiliary Hydraulic Functions
Section 14: Engine Control Unit
Load Indicator - Without Weighing Option (Not For NA)
Load Indicator - With Weighing Option (Not For NA)
Calibration of Weighing Device
Electrical System – Tests (3220 and 3420) up to Serial No. 206800
Functional Schematics, Wiring and Harness Diagrams
Section 1: Starting Motor Power Supply
Electrical System – Tests (3215/3415) - from Serial No. 206801
Functional Schematics, Wiring and Harness Diagrams
Load Indicator - Without Weighing Option (Not For NA)
Load Indicator - With Weighing Option (Not For NA)
Calibration of Weighing Device
Electronic Control Units from Serial No. 206801
Instrument Panel Adjustment from Serial No. 206801
ECU - Engine Control Unit (Level 12)
TCU - Transmission Control Unit
HYD - Hydraulic Control Unit
Load indicator, Setting from Serial No. 206801
Load Indicator - With Weighing Option from Serial No. 206801
Power Train - Tests
Drive - Theory of Operation
Torque Converter - Tests
Shuttle Shift Transmission - Tests
Power Shift Transmission - Tests
Shuttle Shift Transmission Diagnosis
Power Shift Transmission Diagnosis
Steering, Brakes – Tests up to Serial No. 206800
Brake System
Brake System Tests
Hydraulic Trailer Brake Valve
Steering System - Theory of Operation
Steering, Brakes - Tests from Serial No. 206801
Brake System from Serial No. 206801
Brake System Tests
Hydraulic Trailer Brake Valve
Steering System - Theory of Operation
Steering Test
Air Brake System
General Information - Hydraulic System
Valves - Theory of Operation
Hydraulic System 3215 and 3415 - up to Serial No. 206800
Hydraulic System - Hydraulic Circuit Diagram and Theory of Operation up to Serial No. 206800
Hydraulic System - Tests and Adjustments
Hydraulic System 3220 and 3420 - up to Serial No. 206800
Hydraulic System - Hydraulic Circuit Diagram and Theory of Operation up to Serial . 206800
Hydraulic Pump - Operation, Tests and Adjustments
Hydraulic System - Tests
Hydraulic System 3215 and 3415 - from Serial No. 206801
Hydraulic System - Hydraulic Circuit Diagram and Theory of Operation from Serial No. 206801
Hydraulic System - Tests and Adjustments
Hydraulic System 3220 and 3420 - from Serial No. 206801
Hydraulic System - Hydraulic Circuit Diagram and Theory of Operation from Serial No. 206801
Hydraulic Pump - Operation, Tests and Adjustments
Hydraulic System - Tests
Heater, Air Conditioning - Tests
Theory of Operation
Tests
TOTAL PAGE - 1403
FILE FORMAT - PDF
FILE LANGUAGE - ENGLISH
