Mitsubishi MT161–MT241 faults: engine won’t start, overheating & more
Mitsubishi MT161–MT241 faults: cause and solution
Does your Mitsubishi MT161, MT181, MT201, MT221, MT241 or MTZ not start, is it overheating, or is the lift acting up? In this guide you'll find the fault tables from the factory manual, supplemented with the well-known real-world issues of this series based on owners' experiences. Always work on a flat surface, with the engine off and cooled down, and the implement on the ground.
Suitable for the entire series: Mitsubishi MT161, MT161S, MT181, MT201, MT221, MT241, MT241S, MTZ18, MTZ20, MTZ200, MTZ21 and MTZ23.
Mitsubishi MT won't start: starter motor doesn't turn
| Cause | Solution |
|---|---|
| Clutch pedal not fully depressed (safety switch) | Press the pedal all the way down; if that works, check the switch adjustment |
| Battery flat or battery terminals loose/corroded | Charge or replace the battery (12V 45Ah); clean terminals, tighten and grease them |
| Fuse blown | Check the wiring, replace the fuse (fuse box with spare positions) |
Mitsubishi MT won't start: starter motor does turn
| Cause | Solution |
|---|---|
| No fuel or fuel tap set to OFF | Refuel, turn tap to ON, bleed the system |
| Fuel filter clogged | Clean the filter or replace the element |
| Air in the fuel system | Bleed at the bleed nipple until fuel runs free of bubbles |
| Glow plugs faulty (cold start) | Test the glow plugs (resistance measurement after removing the connecting strip) and replace |
Mitsubishi MT series: known real-world issues
Besides the factory tables, a few recurring complaints emerge from owners' practical experience. The main ones, with cause and approach:
Glow system failing gradually. If the glow relay/controller sticks, the glow plugs can keep glowing while driving and burn out. The tell-tale sign: the glow indicator lights up (briefly) while working, or the plugs fail unusually often. In that case, check not only the plugs but also the relay and the wiring. Glow plugs draw 20–30 amps; poor earth connections cause identical symptoms.
Oil leakage at the front axle. The seals of the final drives in the 4WD front axle dry out and start leaking, often combined with wear of the steering knuckle bushings. Replacing only the seal without addressing the bushings usually only helps briefly: the play causes the new seal to fail again quickly. So if there's visible vertical play on the steering knuckle, tackle both.
Wet brakes judder or grip poorly. Almost always an oil issue: at some point regular hydraulic or GL-5 oil was put into the transmission. Refreshing it with the correct wet-brake oil (GL-4 80W / STOU, see the fluids blog) resolves it in many cases; if the complaint persists, the brake discs need replacing.
4WD won't engage or disengage. Often not a fault but tension on the drivetrain: drive a short distance straight ahead or slightly in reverse while operating the lever. If it keeps binding, check the adjustment rod and the shifting mechanism under the machine.
Mitsubishi MT overheats
Check in this order: radiator screen and cooling fins clean? Coolant level correct? V-belt tension good (10–13 mm deflection)? Engine oil level correct? With this series, overheating is rarely the water pump itself and almost always contamination or the belt. Never ignore a boiling engine: prolonged overheating damages the head gasket and burns out injectors. If it's already too late and the engine is consuming coolant (white smoke, pressure in the system), then the head gasket S3L/S3L2 (SKU-201) or, if in doubt, the complete cylinder head repair kit (SKU-990022) is the solution.
Mitsubishi MT smokes: what does the colour tell you?
| Smoke colour | Cause | Solution |
|---|---|---|
| White (after warming up) | Too much engine oil, or coolant in the cylinder | Correct the oil level; if it persists: compression test, check the head gasket |
| Black | Air filter clogged or poor fuel quality | Clean/replace the element, refuel with fresh diesel |
| Blue | Oil consumption: piston rings or valve seals worn | Measure compression; in case of wear, an in-frame overhaul kit (SKU-850066) is the proper solution |
Mitsubishi MT lift not working
Lift won't go up: check the transmission oil level, then replace the hydraulic filter. Lift won't come down: nine times out of ten the lowering speed control is set to "locked" — turn it towards "fast". Strange noise from the hydraulics: oil level too low, oil still cold, or filter clogged. Only once all of this checks out should you consider the gear pump or control valve — that's a job for the workshop.
💡 Product tip: Engine worn out after years of faithful service? For the S3L/S3L2 we have everything in stock: from individual piston rings (VAR-0022) and connecting rod bearings (VAR-0023) to the complete overhaul kit (VAR-0018).
