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Kubota L3250 Troubleshooting

Kubota L3250 Engine Troubleshooting

Engine starts hard or won't start: Dirty fuel filter. Clean or replace the filter. Air in fuel tank. Bleed fuel tank. Dirty or damaged injection nozzles. Clean or change injection nozzles. Fuel injection pump malfunction. Repair or install new pump.

Engine stops unexpectedly during operation: Wrong setting of fuel injection pump timing. Adjust the pump as required. Dirty fuel filter. Service the filter. Engine is not warmed up to the required temperature. Engine is not warmed up to the required temperature.

Diesel starts but stalls suddenly: Fuel filter element is clogged. Change filter element. Fuel injection pump is defective. Repair or change injection pump. Air filter plugged. Replace air filter element.

Engine overheated: Clogged radiator core or leaking radiator cap. Replace cap or clean radiator. Insufficient coolant. Add coolant fluid and inspect the cooling system for leaks. Loose or damaged fan belt. Change as required. Engine oil level is insufficient. Fill the crankcase with engine oil.

Engine is not running at maximum power: Clogged injection nozzle. Replace injection nozzles. Clogged fuel lines or hoses. Fuel lines and hoses need to be cleaned. Clogged air cleaner. Change air filter element. Cylinder head gasket is damaged. Replace cylinder head gasket.

Engine knocking or noise: Engine is not warmed up to the required temperature. Engine is not warmed up to the required temperature. Not enough engine oil. Fill up the engine oil. Improper setting of fuel injection pump timing. Set it up as required. Pistons are worn or broken. Replace the pistons as required. Connecting rod misalignment or failure. Align or change connecting rod.

Engine stops while idle: Incorrectly adjusted low idle speed. Adjust as required. The valve clearance is incorrect. Correct valve clearance needs to be set. Fuel injection pump is not operating properly. Repair or replace injection pump.

Oil pressure is low: Low oil level. Fill the crankcase with oil. Oil pump failure. Install a new pump. Oil filter clogging. Service or replace engine oil filter.

Kubota L3250 Transmission Troubleshooting

Transmission is excessively noisy: Worn gears or incorrect backlash. Replace gears or adjust backlash correctly. Damaged or worn gear shift forks. Shift forks need to be changed. Worn or damaged shaft splines. Change the shaft. Insufficient transmission oil. Fill up the transmission oil. Worn or cracked bearings. Bearings need to be replaced. Transmission oil is contaminated. Change the oil.

Difficulty shifting gears: Worn or rusty gear shift linkage. Replace or lubricate the shift linkage. Unadjusted or worn clutch. Clutch needs to be adjusted or changed. Shift forks are bent or worn out. Shift forks need to be changed. Worn gear shifting mechanism. Repair or change worn components if necessary.

Lack of transmission oil pressure: Transmission oil insufficient. Fill the transmission housing with oil. Transmission fluid filter is clogged (if fitted). Clean or change transmission fluid filter. Relief valve is damaged. Replace valve as required.

External fluid leaks: Worn seals or gaskets. Change defective gaskets or seal. Transmission fluid level is exceeded. Excess fluid must be drained.

Kubota L3250 Hydraulic System Troubleshooting

Hydraulic system overheats: Incorrect type of hydraulic fluid. Use the correct type of fluid. Hydraulic oil is dirty. Hydraulic oil change required. Air trapped in hydraulic system. Bleed air from system. Defective main relief valve. Change relief valve.

Hydraulic fluid pressure too low: Insufficient hydraulic oil. Need to add oil. Dirty hydraulic oil filter element. Clean the hydraulic filter element or replace if necessary. Leaks in hydraulic lines. Check the system and repair leaks. Hydraulic spool valve is out of adjustment. Spool valve adjustment required. Hydraulic pump malfunction. Change or repair hydraulic fluid pump. Hydraulic cylinder malfunction. Repair or change hydraulic cylinder.

Hitch can't lift or lifts too slowly: Damaged hydraulic pump. Replace or repair hydraulic fluid pump. Damaged main relief valve. Replace relief valve. Defective hydraulic control valve block. Change or repair hydraulic valve. Hydraulic cylinder is defective. Repair or replace hydraulic cylinder. Hydraulic oil is insufficient. Need to add oil. Clogged hydraulic fluid filter element. Change the hydraulic filter element or service if required. Excessive hitch loading. The load should be reduced.

Hitch cannot be lowered or lowering is too slowly: Hydraulic cylinder is defective. Install a new hydraulic cylinder or repair it. Not adjusted hydraulic control valve. Need to adjust. Damaged lift arm shaft. Change the shaft. The hitch has not been adjusted. Adjust the hitch.

Hitch lift or lower is jerky: Contaminated hydraulic oil. Change hydraulic oil. Faulty hydraulic pump. Repair or replace hydraulic oil pump. There is air in the hydraulic system. Bleed hydraulic system. Faulty hydraulic control valve. Change or repair hydraulic valve. Hydraulic cylinder not working. Install a new hydraulic cylinder or repair it.

Kubota L3250 Steering Troubleshooting

Steering wheel has too much free-play: Steering column shaft or coupling is worn out. Replace faulty part. Steering pump is worn. Check the steering pump and replace if necessary. Steering linkage joints are worn or loose. Inspect and replace as required. Steering control valve has damage or wear. Inspect and replace as required. Steering box parts are worn out. Repair power steering box.

Excessive effort to steer: Air lock in the steering system. Air-bleed steering system. Clogged steering filter. Clean or change steering filter. Lack of steering fluid. Need to add steering oil. Defective or worn steering control valve. Check and replace as required. Steering box components have excessive wear. Replace defective parts of power steering box. Steering pump is worn. Steering pump needs to be replaced or repaired. Stuck or worn pump flow control valve. Install a new flow control valve or clean it. Worn or incorrectly fitted steering column. Replace the steering column or refit it correctly. Tyre pressure is uneven. Adjust the tyre pressure. Not adjusted toe-in. Adjust toe-in wheels.

Front wheels wander to left or right: Steering box parts have malfunctions. Change defective steering box parts. Power steering control valve is worn or defective. Inspect and change as required. Improper toe-in. Check and adjust toe-in. Loose or worn steering linkage parts. Check and replace as required. Front wheel bearings are defective or improperly adjusted. Adjust correctly or change bearings. Uneven tyre pressure. Inflate the tyres properly.

Kubota L3250 Electrical System Troubleshooting

Battery is not charging: Corroded or loose electrical wire connections. Tighten or clean connections. Defective battery terminal clamps. Install new terminal clamps. Battery is worn. Battery replacement required. Damaged or loose belt. Need to adjust belt tension or replace belt.

Starter motor cranks slow: Battery capacity is low. Charge the battery. Battery will not hold charge. Service charging system or replace battery. Disconnected wires or corroded battery terminals. Check cable connections and change or clean terminals.

Starter motor is not working: Battery is low or faulty. Change or recharge battery. Battery cables are disconnected or improperly connected. Inspect cables and connect properly. Low battery power. Recharge the battery. Starter motor is damaged. Starter should be changed.