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Kubota M108X Troubleshooting

Kubota M108X Engine Troubleshooting

Engine difficult to start or will not start: Dirty fuel filter. Clean or replace the filter. Air in fuel system. Bleed fuel system. Fuel injection nozzles fault. Test injection nozzles and change if necessary. Fuel injection pump failure. Rebuild or install a new injection pump.

Engine shuts off suddenly while running: Fuel injection pump timing is wrong. Set it up as required. Fuel filter element is clogged. Change the filter element. Engine not warmed up. Warm up engine as required.

Engine starts but then stalls: Fuel filter plugging. Filter maintenance required. Fuel injection pump malfunctioning. Replacement or repair required. Air cleaner is dirty. Clean or change.

Engine overheating: Dirty radiator fins or faulty radiator cap. Clean radiator or install new cap. Not enough coolant. Add coolant fluid to cooling system and also check it for leaks. Broken or loose fan belt. Install new fan belt. Engine oil level low. Check oil level and add oil as required.

Loss of engine power: Dirty or faulty injection nozzles. Clean or change injection nozzles. Dirt in the fuel hoses or lines. Clean fuel system lines and hoses. Air filter element clogged. Replace air filter element. Blown cylinder head gasket. Gasket should be replaced.

Engine knocks or noises: Engine is not preheated. Warm up engine as required. Low engine oil level. Fill up the engine oil. Fuel injection pump timing is not adjusted. Adjust according to specifications. Pistons are worn or broken. Pistons need to be replaced. Connecting rod is misaligned or worn. Align or replace connecting rod.

Engine stalls when idle: Low idle speed set incorrectly. Adjust low idling as recommended. The valve clearance is incorrect. Correct valve clearance needs to be set. Fuel injection pump malfunctioning. Replace or rebuild injection pump.

Oil pressure is low: Oil level is insufficient. Add oil to the engine crankcase. Oil pump is damaged. Remove and inspect oil pump. Oil filter element clogging. Service or replace engine oil filter.

Kubota M108X Transmission Troubleshooting

Transmission noises: Worn gears or incorrect backlash. Adjust backlash correctly or replace the gears. Shift forks are bent or worn out. Install new shift forks. Worn or stuck shaft splines. Install a new shaft. Transmission oil insufficient. Need to add transmission oil. Bearings are broken or worn. Replace the bearings. Transmission oil is dirty. Change the oil.

Hard to shift gears: Gear shift linkage is rusty or worn. Lubricate or replace shift linkage. Worn or improperly adjusted clutch. Adjust clutch or change if necessary. Damaged or worn gear shift forks. Shift forks need to be replaced. Gearshift mechanism is damaged. Replace or repair the mechanism.

Low transmission pressure: Transmission fluid level is low. Fill the transmission housing to proper fluid level. Dirty transmission oil filter element (if equipped). Service or change transmission oil filter. Relief valve failure. Replace relief valve.

Transmission fluid leaking: Seals or gaskets are broken. Gaskets or seal replacement required. Transmission oil level is high. Correct the oil volume.

Kubota M108X Hydraulic System Troubleshooting

Hydraulic system overheated: Incorrect hydraulic oil type. Use the correct type of hydraulic oil. Hydraulic fluid is dirty. Hydraulic fluid change required. Air in hydraulic lines. Bleed hydraulic lines. Main relief valve malfunction. Relief valve must be changed.

Low hydraulic system pressure: Hydraulic fluid is insufficient. Fill up the hydraulic fluid. Dirty hydraulic oil filter element. Change the hydraulic filter element or service if required. Leaking hydraulic pipes. Find leaks in the system and fix it. Incorrect adjusted hydraulic control valve. Adjust correctly. Hydraulic pump not working. Change or repair hydraulic oil pump. Hydraulic cylinder malfunction. Repair or change hydraulic cylinder.

Hitch not lifting or hitch lifts slowly: Hydraulic pump is defective. Install a new hydraulic oil pump. Faulty main relief valve. Relief valve replacement required. Damaged hydraulic spool valve. Repair or change the valve. Hydraulic cylinder is faulty. Repair or change hydraulic cylinder. Hydraulic fluid level low. Fill the system to proper hydraulic fluid level. Hydraulic oil filter is clogged. Change the hydraulic filter element or service if required. Hitch is under excessive load. Reduce the load is required.

Hitch won't drop or drops slowly: Hydraulic cylinder not working. Repair or change hydraulic cylinder. Hydraulic control valve block is set improperly. Set properly. Hitch cross shaft is damaged. Replace the shaft. The 3-point hitch is not adjusted. Adjust as required.

Jerky lifting or lowering of three-point hitch: Dirty hydraulic fluid. The fluid must be changed. Damaged hydraulic pump. Install a new hydraulic oil pump. Air in the hydraulic system. Air bleeding. Hydraulic control valve is faulty. Install a new valve or repair it. Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder.

Kubota M108X Steering Troubleshooting

Excessive play in steering: Steering column coupling or shaft is extremely worn out. Change faulty component. Damaged hydraulic steering pump. Repair or replace steering pump. Steering linkage assembly is worn or loose. Check and change as required. Hydrostatic steering unit has wear or damage. Check and replace as required.

Steering wheel turns hard: Air trapped inside steering system. Bleed air. Steering filter clogging. Steering filter need to be replaced. Steering fluid level is low. Check fluid level and add steering fluid as required. Worn or damaged hydrostatic steering unit. Repair or replace the steering unit. Steering pump is worn. Repair or replace steering pump. Faulty or stuck pump flow control valve. Change or flush control valve. Worn or incorrectly fitted steering column. Replace the steering column or refit it correctly. Tyre pressure is uneven. Adjust the tyre pressure. Incorrect toe-in. Adjust toe-in wheels. Leaking steering cylinder. Damaged cylinder seals or worn piston rod.

Tractor is pulling to left or right: Hydrostatic steering unit has damage or wear. Repair or change the steering unit. Steering cylinder is defective. Repair or change steering cylinder. Not adjusted toe-in. Adjust toe-in wheels. Steering linkage joints are worn or loose. Inspect and change as required. Defective or improperly adjusted front wheel bearings. Adjust correctly or install new bearings. Tires have uneven wear. Replace the tires.

Kubota M108X Electrical System Troubleshooting

Battery cannot be charged: Loose or corroded electrical wiring connections. Tighten or service connections. Defective battery terminal clamps. Terminal clamps need to be replaced. Battery is defective. Change the battery. Belt is damaged or loose. Belt needs to be adjusted or replaced.

Starter cranks slow: Low battery power. Battery is drained, charge it. Battery does not hold charge. Service charging system or install new battery. Disconnected wires or corroded battery terminals. Connect wiring correctly or install new terminals.

Starter does not work: Battery is low or faulty. Charge or replace the battery. Battery wiring is disconnected or improperly connected. Inspect wiring and connect as required. Low battery voltage. Charge the battery. Starter motor failing. Starter should be replaced.