John Deere 3320 3520 3720 Compact Utility Tractors with Cab Repair Technical Manual TM2365

What's Covered in This Manual

This is the official John Deere TM2365 Technical Manual for the 3320, 3520, and 3720 Compact Utility Tractor Series built with a factory cab. Published by John Deere Augusta Works, this manual is written for an experienced technician and combines two manual types in one book: repair sections that walk through full component disassembly and reassembly, and operation-and-tests sections that help a tech narrow down a routine failure fast before ever pulling a wrench.

The engine section covers the Yanmar diesel engines used across this tractor line - the naturally aspirated 3TNV88 and the turbocharged 3TNV84T and 3TNV84HT variants - including oil pump service, piston groove clearances, turbocharger failure analysis, and a full diagnostic table for fuel system and fuel filter/water separator troubleshooting. Beyond the engine, the manual works through electrical system schematics and harnesses specific to North American spec machines, PTO theory of operation and repair, final drive and transmission troubleshooting and repair, and complete hydraulics and steering sections with schematics, component locations, and tests and adjustments.

Because this manual covers the cab-equipped versions specifically, it also includes the cab-related electrical circuits and switch logic referenced in the troubleshooting sections - useful for chasing down issues with seat switches, PTO interlocks, and start circuit safety logic that differ from the open-station versions of these tractors. This is the complete factory reference for anyone maintaining, diagnosing, or rebuilding a cab-equipped 3320, 3520, or 3720.

Table of Contents

• Section 10 - Safety
• Section 20 - Specifications and Information - general specs, fuel/lubricants, serial numbers
• Section 30 - Engine - Diesel - Yanmar 3TNV series, diagnostics, tests, repair
• Section 40 - Electrical - North America - schematics, harnesses, troubleshooting
• Power Train - Final drive troubleshooting, tests and adjustments, repair
• PTO - Theory of operation and repair
• Section 80 - Hydraulics - specifications, schematics, theory, troubleshooting, repair
• Section 90 - Steering - specifications, diagnostics, tests, repair