John Deere 8320RT 8345RT 8370RT 8RT Tractors Diagnosis and Tests Manual TM119219

What's Covered in This Manual

This is the official John Deere TM119219 Diagnosis and Tests Manual for the 8320RT, 8345RT, and 8370RT track tractors (also referred to as the 8RT series), covering serial number range 912001-916999. Published by John Deere Agriculture in October 2015, this manual is built specifically for troubleshooting and includes the complete electrical wiring diagrams for these tractors, a detail the manual's own title page calls out directly.

Inside, the manual provides diagnostic trees and test procedures covering the engine, electrical system, hydraulics, power train, and the track undercarriage system unique to these RT-series track tractors. Each diagnostic path walks through specific checks with clear pass/fail outcomes, letting a technician isolate a faulty component or circuit quickly rather than guessing. The included wiring diagrams make tracing an electrical fault back to its source straightforward, which is especially valuable on a machine with as many electronically controlled systems as these tractors carry.

All three model designations are confirmed present in the manual text. This manual is meant to be used alongside a separate Repair manual covering the same model range for actual component disassembly work. For anyone troubleshooting an electrical, hydraulic, or drivetrain fault on an 8320RT, 8345RT, or 8370RT, this diagnostic manual with its complete wiring diagrams is the essential reference.

Table of Contents

• Section 210 - General Information
• Engine Diagnostics - Diagnostic trees and test procedures
• Electrical Diagnostics - Wiring diagrams and component diagnostic trees
• Hydraulics Diagnostics - Pressure tests and troubleshooting
• Power Train Diagnostics - Transmission and track drive diagnostic procedures