1970s–1990s Mitsubishi MT160, MT180, MT210, MT250, MT300 Tractor Service & Repair Manual

This shop manual covers 1970s–1990s Mitsubishi MT160, MT180, MT210, MT250, and MT300 tractors, including D-suffix 4WD models and the MT180H/MT180HD hydrostatic versions.

Text search, navigation and diagram detail: The PDF is partly searchable through its OCR text layer; some service-data tables and diagram labels are not searchable. Embedded bookmarks include incorrect section links. Small wiring labels require magnification, and some fine wire codes remain indistinct.

• Engine repair: Engine removal, cylinder-head service, piston and ring installation, valve-clearance adjustment, timing-gear alignment, and crankshaft and oil-pump inspection.

• Diesel fuel system: Fuel-filter replacement and bleeding, injection-pump timing, governor service, injector-nozzle testing and overhaul, and glow-plug checks.

• Transmission and clutch: Tractor clutch splitting, clutch overhaul, sliding-gear and synchromesh transmission service, plus hydrostatic troubleshooting, pressure testing and overhaul.

• Power take-off: PTO drive components, overrunning clutches, and optional live-PTO hydraulic clutch packs, control valves and linkage adjustments.

• Axles and brakes: Front-axle removal for 2WD and 4WD models, outer-drive overhaul, differential and final-drive adjustments, and drum/disc brake service.

• Hydraulics and steering: Hydraulic-pump and control-valve service, lift troubleshooting, relief-pressure tests, linkage adjustments, and manual and power-steering repair.

• Electrical diagnosis: Alternator and starting-motor testing, safety-start switch adjustment, and fuel shut-off solenoid troubleshooting supported by circuit diagrams.

This manual is suited to mechanics familiar with tractor splitting, press work and hydraulic pressure testing, with appropriate lifting and measuring equipment.

K3 Engine Repair, Fuel Injection and Cooling

The engine sections cover K3A, K3C, K3D, K3H and K3M powerplants. They distinguish semi-floating piston pins in K3A/K3C/K3D engines from full-floating pins in K3H/K3M engines and specify tool ST332301 for the press-fit design.

The piston-pin section warns that hammering out press-fit pins can damage the piston and connecting rod.

Injection-pump coverage includes timing, removal and installation, and camshaft service, with a separate timing setting for MT210/MT210D models. Pump recalibration is outside the procedures provided; injector testing and overhaul require specialist equipment and training.

Cooling coverage includes radiator removal, thermostat specifications and installation notes, and water-pump replacement. The water pump is treated as a nonserviceable assembly.

Transmission, Live PTO and Serial Breaks

MT160/MT180 gear-drive models use sliding-gear transmissions; MT210/MT250/MT300 models use synchromesh main transmissions with separate range gearing. MT180H/MT180HD coverage follows the closed-loop hydrostatic system through its charge pump, relief valves and neutral valve, supported by the schematic in Fig. 113.

The hydrostatic pressure tests help distinguish valve faults from internal wear before teardown.

Early live-PTO clutch assemblies are illustrated separately for MT300 before S/N 10051 and MT300D before S/N 50146. The later clutch assembly and clutch-pack clearance adjustment are also covered.

Axles, Brakes and Hydraulic Controls

Front-axle coverage distinguishes the MT210's fixed-tread axle before S/N 10166 from its later adjustable-tread axle. Differential service includes a gear tooth-contact chart (Fig. 126). The MT300/MT300D sections cover wet disc brakes; other models use dry drum brakes.

For hydraulic repair, the text separates the MT160 control-valve design, shown in section in Fig. 161, from the unloading/check-valve arrangements used on other models. Nachi and Kayaba pumps, optional draft control, and position/lowering-speed linkage adjustments are included.

On tractors equipped with power steering, MT210/MT250 variants use a flow divider; MT300/MT300D versions have a separate pump and reservoir. Steering-gear overhaul includes dimensions for a reaction-spring retaining plate.

Electrical Circuits and Service Specifications

The electrical section covers the AH2035M4 alternator, Tirrill regulator and model-specific starting motors. The fuel shut-off wiring diagram (Fig. 74) accompanies fault lists for solenoid operation and an engine that stops when the key returns from START.

Two basic electrical diagrams separate MT300/MT300D wiring (Fig. 76) from the other covered models (Fig. 75).

Component-specific torque specifications, staged cylinder-head bolt tightening sequences, fluid capacities, wear limits and electrical test values support the repair procedures. The manual uses Metric and U.S. Customary measurements.

Always verify load capacities and follow standard shop safety practices before attempting the heavy component teardowns detailed in this reference.

PDF Contents and Page Count

One printable English PDF contains 75 pages, covering printed pages 2–76. The opening five pages include model identification, serial-number locations and the paragraph index, with service-data tables starting on the fifth page; all are included in the total. No separate addenda or supplementary files are included.