John Deere 4120, 4320, 4520, 4720 Compact Utility Tractors Technical Manual
John Deere Tractor Manual
Table of Content (Technical Manual TM2137)
Manual Description
Safety
Specifications & Information
Engine – Diesel
Electrical
Electrical – European
Power Train – PRT
Power Train – Hydrostatic
Power Train – Final Drive
Hydraulics
Steering
Brakes
Miscellaneous
🔧 John Deere 4120, 4320, 4520, 4720 Compact Utility Tractors Technical Manual PDF
Looking for a John Deere 4120, 4320, 4520, 4720 Compact Utility Tractors Technical Manual? This official factory service manual is your go-to source for diagnostics, repair procedures, specifications, and complete maintenance for John Deere’s mid-size utility tractors. Available in downloadable PDF format, it’s perfect for technicians, farmers, and mechanics.
✅ Complete Engine Service Procedures
✔ Covers full engine disassembly, inspection, and assembly
✔ Detailed torque specs, valve clearance, fuel system calibration
✔ Includes diagrams for cooling and lubrication system
✅ Transmission and Powertrain Repair
✔ Hydrostatic and PowrReverser transmission diagnostics
✔ Powertrain component breakdowns and rebuild instructions
✔ Axle and differential repair data for all four models
✅ Electrical System Troubleshooting
✔ Wiring diagrams for all major electrical systems
✔ Battery, alternator, starter, and switch diagnostics
✔ CAN bus and ECU fault code interpretation
✅ Hydraulic System Testing & Repair
✔ SCV (Selective Control Valve) testing and replacement
✔ Loader and 3-point hitch hydraulic diagnostics
✔ Pump specs, pressure tests, and cylinder repair
✅ Steering and Braking Systems
✔ Power steering system repair with step-by-step photos
✔ Parking brake and wet disc brake service procedures
✔ Alignment and hydraulic assist system checks
✅ Routine Maintenance & Preventive Service
✔ Fluid capacities, service intervals, and filters
✔ Recommended lubricants and torque specs
✔ Maintenance checklists for field readiness
✅ Diagnostic Trouble Code (DTC) Charts
✔ Built-in trouble code reader functionality
✔ Solutions for most common JD compact tractor faults
✔ Easy-to-use flowcharts for quick issue resolution
