This is the factory service manual for the Mustang MTL312 track loader, part number 917367, built around the Yanmar 4TNV84T diesel. The 263 page PDF is the same reference a dealer technician uses, written for disassembly and assembly, inspection, maintenance, and troubleshooting, with a searchable text layer.
It is organized into safety, service data, function, disassembly and assembly, and troubleshooting sections. Service data holds the specifications, tightening torques, and the hydraulic circuit and electrical wiring diagrams, while the disassembly chapters walk through the gear pump, control valve, self level valve, pilot valve, cylinders, and travel motor step by step.
Owners, independent mechanics, and restorers can download it instantly and print the pages they need, so torque figures, tension settings, and rebuild procedures for the MTL312 are on hand at the bench.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 3-12 | |
| Service Data | 13-36 | Hydraulic Circuit Diagram, Electrical Wiring Diagram, Wire Harness Diagram |
| Function | 37-78 | Air Conditioner System |
| Gear Pump | 132-136 | |
| Control Valve | 137-142 | |
| Sub Valve | 143-147 | |
| Self-Level Valve | 148-151 | |
| Pilot Valve | 152-158 | |
| Cylinders | 159-174 | Proportional Control Solenoid Valve |
| Travel Motor | 175-194 | |
| Air Conditioner | 195-198 | |
| Troubleshooting | 199-263 | Air Conditioner System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque section | PDF page 28 | p. 28 |
| Hydraulic oil tank total amount of oil | 45 L | p. 18 |
| Hydraulic oil tank capacity | 29 L | p. 18 |
| Starting system voltage | 12 V | p. 16 |
| Starting system output | 2.3 kW | p. 16 |
| Fan belt adjustment (force) | 98 N | p. 195 |
| Fan belt adjustment (yield) | 8 mm | p. 195 |
| Crawler tension | 25 to 50 mm | p. 20 |
| Drive sproket A standard dimension | 384 mm | p. 80 |
| Drive sproket A allowable value | 374 mm | p. 80 |
| Rated engine speed | 2800 min-1 | p. 16 |
| Bucket capacity | 0.298 m3 | p. 15 |
