
John Deere 4120 4320 4520 4720 Compact Utility Tractors Technical Manual TM2370
The John Deere 4120, 4320, 4520 and 4720 Compact Utility Tractors Technical Manual provides detailed technical information covering specifications, diagnostics, troubleshooting, tests and adjustments, theory of operation, and repair. The manual covers the diesel engine, electrical systems, hydrostatic power train, final drive, hydraulics, steering, brakes, HVAC, and miscellaneous tractor systems.
Specifications: SM
- Brand: John Deere
- Type of Document: Technical Manual
- Type of Equipment: Utility Tractor
- Model: 4120, 4320, 4520, 4720
- Utility Tractors Serial Number: 120001-610000, 130001-610000, 150001-610000, 170001-610000
- Manual Number: TM2370
- Language: English
- Format: PDF

Details:
Table of Contents
Introduction
Safety
Specifications and Information
- Table of Contents
- General Specifications
- O-Ring Seal Service Recommendations
- Fuels and Lubricants
- Coolant Specifications
- Serial Number Locations
Engine – Diesel
- Table of Contents
- Specifications
- Tools and Materials
- Theory of Operation
- Theory of Operation (Air and Fuel)
- Diagnostics
- Tests and Adjustments
- Repair
- Cylinder Head and Valves
- Cylinder Block, Pistons, and Rods
- Crankshaft, Main Bearings and Flywheel
- Camshaft, Balancer Shafts and Timing Gear Train
- Lubrication System
- Cooling System
- Air Intake and Exhaust System
- Fuel System
- Starting and Charging Systems
Electrical
- Table of Contents
- General Information
- Specifications
- Component Location
- Schematics and Harnesses
- Troubleshooting
- Operation and Diagnostics
- Tests and Adjustments
Electrical – EEC
- European Electrical Section
- Specifications
- Component Location
- Schematics and Harnesses
- Troubleshooting
- Operation and Diagnostics
Power Train – Hydrostatic
- Table of Contents
- Specifications
- Component Location
- Schematics
- Theory of Operation
- Troubleshooting
- Diagnostics
- Tests and Adjustments
- Repair
Power Train – Final Drive
- Table of Contents
- Specifications
- Component Location
- Theory of Operation
- Diagnostics
- Tests and Adjustments
- Repair
- PTO Theory of Operation
- PTO Repair
Hydraulics
- Table of Contents
- Specifications
- Component Location
- Schematics and Harnesses
- Theory of Operation
- Diagnostics
- Tests and Adjustments
- Repair
Steering
- Table of Contents
- Specifications
- Component Location
- Theory of Operation
- Diagnostics
- Tests and Adjustments
- Repair
Brakes
- Table of Contents
- Specifications
- Component Location
- Theory of Operation
- Diagnostics
- Tests and Adjustments
- Repair
HVAC
- Table of Contents
- Specifications
- Tools and Materials
- General Information
- Tests and Adjustments
Miscellaneous
- Table of Contents
- Specifications
- Tools and Materials
- Tests and Adjustments
- Repair
Index
- A
- B
- C
- D
- E
- F
- G
- H
- I
- L
- M
- O
- P
- R
- S
- T
- U
- W



