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Kubota L4060 Troubleshooting

Kubota L4060 Engine Troubleshooting

Engine difficult to start or doesn't start: Fuel filter element is clogged. Service the filter. Air in fuel tank. Bleed fuel tank. Defective or clogged injection nozzle. Clean or replace injection nozzles. Fuel injection pump is broken. Rebuild or install a new injection pump.

Engine stops unexpectedly during operation: Timing of fuel injection pump is incorrect. Use the correct fuel injection pump timing adjustment. Fuel filter element clogging. Change filter element. Engine is cold. Warm up the engine.

Engine stalls after starting: Fuel filter element is clogged. Service or replace the filter. Fuel injection pump is defective. Repair or install new pump. Air filter plugged. Service air cleaner.

Engine is overheated: Radiator core is dirty or radiator cap is damaged. Clean radiator or change cap. Low engine coolant. Add coolant and check the components of cooling system. Fan belt is broken or worn. Belt change is required. Lack of engine oil. Add oil to the engine crankcase.

Diesel engine is losing power: Damaged or dirty injection nozzles. Service or change injection nozzles. Fuel hoses or lines clogging. Clean fuel hoses and lines. Clogged air cleaner. Carry out maintenance on air filter. Leaking cylinder head gasket. Gasket should be replaced.

Engine noise or knocking: Engine is cold. Warm up the engine. Engine oil level is insufficient. Checking oil level and add if necessary. Improper setting of fuel injection pump timing. Use the correct fuel injection pump timing adjustment. Worn or broken pistons. Replace the pistons as required. Connecting rod is worn or misaligned. Replace or align connecting rod.

Engine stops at idle: Incorrect low idle speed adjustment. Normalize low idle speed. Incorrect valve clearance. Need to adjust valve clearance. Damaged fuel injection pump. Replacement or repair required.

Oil pressure is low: Not enough oil in the engine. Add oil to the engine crankcase. Oil pump failure. Remove and inspect oil pump. Clogged oil filter. Service or replace engine oil filter.

Kubota L4060 Transmission Troubleshooting

Excessive transmission noise: Improper backlash or worn gears. Adjust backlash correctly or replace the gears. Worn or bent shift forks. Shift forks need to be changed. Worn or stuck shaft splines. Install a new shaft. Low fluid level. Add fluid to the transmission housing. Bearings are damaged or worn. Install new bearings. Transmission fluid is dirty. Transmission fluid change required.

Difficult to shift gears: Stuck or worn gear shift linkage. Install a new gear shift linkage. Malfunction or incorrect clutch adjustment. Clutch replacement or adjustment required. Damaged or worn gear shift forks. Install new shift forks. Worn out parts of the gearshift mechanism. Replace worn parts.

Low transmission oil pressure: Lack of transmission oil supply. Fill the transmission housing to proper oil level. Transmission fluid filter element clogging (if equipped). Replace or service transmission fluid filter. Relief valve is stuck. Replace valve as required.

Transmission oil leakage: Damaged gaskets or seals. Gaskets or seal need to be replaced. Too much oil in transmission. Drain the excess oil.

Hydrostatic Transmission Troubleshooting

HST transmission noise: Speed control pedal linkage is damaged or out of adjustment. Change or adjust linkage. Transmission overload. Load needs to be reduced. Contaminated transmission fluid or low fluid level. Pour fresh fluid or add transmission fluid to proper level. Relief valve is stuck. Install a new valve. Transmission components are damaged or worn. Replace or repair defective components.

Transmission fluid overheats: Transmission overload. The load should be reduced. Cooling components are defective or plugged. Check all cooling components and repair or change if required. Transmission oil level is low. Check transmission oil level and add oil as required. Dirty transmission fluid filter element. Service or replace the transmission fluid filter.

Lack of power: Transmission fluid level is low. Check and refill the transmission fluid. Relief valve failure. Replace valve as required. Speed control pedal linkage is bent or not adjusted. Replace or adjust linkage.

Transmission fluid leaks: Oil drain pipe is plugged. Check pipe and service if necessary. Damaged seals or gaskets. Change defective seal or gaskets. High internal transmission housing pressure. Repair or replace damaged components.

Kubota L4060 Hydraulic System Troubleshooting

Hydraulics overheating: Incorrect type of hydraulic fluid. Use the correct type of fluid. Hydraulic oil is dirty. Hydraulic oil change required. Air in the hydraulic system. Air bleeding. Main relief valve failure. Change relief valve.

Hydraulic fluid pressure is low: Insufficient hydraulic fluid. Fill up the hydraulic fluid. Hydraulic oil filter element is clogged. Replace filter element or clean if required. Hydraulic piping is leaking. Find leaks in the system and fix it. Hydraulic spool valve is not set properly. Set the spool valve properly. Faulty hydraulic pump. Repair or replace hydraulic oil pump. Hydraulic cylinder failure. Replace or repair hydraulic cylinder.

Hitch does not raise or raises very slowly: Hydraulic pump not working. Replace or repair hydraulic oil pump. Main relief valve is damaged. Relief valve need to be replaced. Hydraulic spool valve is defective. Repair or change the valve. Hydraulic cylinder is faulty. Change or repair hydraulic cylinder. Low hydraulic oil level. Fill the system to proper hydraulic oil level. Clogged hydraulic fluid filter element. Replace hydraulic filter element or service if necessary. Excessive loading on the hitch. Reduce loading.

Hitch not lowering or hitch lowers slowly: Damaged hydraulic cylinder. Repair or change hydraulic cylinder. Hydraulic control valve is out of adjustment. Need to make adjustment. Worn hitch rock shaft. Change the shaft. The hitch has not been adjusted. Adjust 3-point hitch as required.

Hitch jerks when drop or lift: Dirty hydraulic oil. The oil must be changed. Hydraulic pump is faulty. Install a new hydraulic fluid pump. There is air in the hydraulic system. Bleed hydraulic system. Defective hydraulic spool valve block. Replace or repair the valve. Hydraulic cylinder failure. Replace or repair hydraulic cylinder.

Kubota L4060 Steering System Troubleshooting

Steering wheel has too much free-play: Steering column coupling or shaft has maximum wear. Replace faulty part. Faulty steering pump. Check the steering pump and replace if necessary. Loose or worn steering linkage components. Check and change as required. Hydrostatic steering unit has malfunction or wear. Inspect and replace as required.

Stiff steering: Air in the hydraulic steering system. Bleed air. Dirty steering filter element. Steering filter maintenance required. Lack of steering oil. Fill the steering system with oil. Hydrostatic steering unit is worn or defective. Inspect and change as required. Faulty steering pump. Steering pump needs to be repaired or replaced. Steering pump control valve is worn or stuck. Clean or replace control valve. Improperly mounted or worn steering column. Mount the steering column as required or change it. Tire pressure uneven. Inflate the tires correctly. Not adjusted toe-in. Check and adjust toe-in. Leaking steering cylinder. Replace damaged piston seals or worn piston rod.

Tractor pulls to left or right: Hydrostatic steering unit is defective or worn. Inspect and change as required. Faulty steering cylinder. Change or repair hydraulic steering cylinder. Not adjusted toe-in. Adjust toe-in wheels. Loose or worn steering linkage components. Change or repair steering linkage. Front wheel bearings are defective or improperly adjusted. Install new bearings or adjust it correctly. Front tires wear unevenly. Change the tires.

Kubota L4060 Electrical Troubleshooting

Battery is not charging: Electrical wire connections are corroded or loose. Tighten or clean electrical wiring connections. Faulty battery terminal clamps. Replace terminal clamps. Dead cell in battery. Replace the battery. Loose or defective belt. Adjust belt tension or replace belt.

Starter turns slow: Low battery capacity. Charge the battery. Battery does not hold charge. Battery needs to be serviced or replaced. Terminals are faulty or battery cables are disconnected. Connect wires properly or change terminals.

Starter motor won't turn: Battery is discharged or worn. Need to charge or replace the battery. Battery wires are disconnected or incorrectly connected. Check wires and connect correctly. Low battery output voltage. Recharge the battery. Starter motor is damaged. Change or repair starter.