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Kubota L3350 Troubleshooting

Kubota L3350 Diesel Engine Troubleshooting

Engine difficult to start or will not start: Clogged fuel filter. Change filter element. Air in the fuel pipes. Bleed the fuel pipes. Fuel injection nozzles are faulty or clogged. Check injection nozzles and replace if required. Fuel injection pump is faulty. Install a new fuel pump or repair.

Engine stalls after running: Fuel injection pump timing is wrong. Set the fuel pump timing correctly. Fuel filter plugged. Clean or change the filter. Engine is not preheated. Warm up to required temperature.

Engine starts but then stops: Dirty fuel filter. Install new filter element. Fuel injection pump malfunction. Repair or change injection pump. Dirty air filter element. Clean or change.

Engine is overheated: Dirty radiator fins or faulty radiator cap. Clean radiator or replace cap. Not enough coolant. Add coolant fluid to cooling system and also check it for leaks. Fan belt is broken or worn. The fan belt needs to be replaced. Insufficient engine oil. Need to add engine oil.

Diesel power loss: Fuel injection nozzles are clogged or faulty. Clean or change injection nozzles. Dirty fuel hoses or lines. Service fuel lines and hoses. Dirty air cleaner. Replace air filter element. Cylinder-head gasket is leaking. Install a new gasket.

Engine knocking or noise: Engine is not preheated. Warm up to required temperature. Engine oil level low. Fill up the oil to required level. Improper fuel injection timing. Adjust as recommended. Pistons are worn or broken. Install new pistons. Faulty or misaligned connecting rod. Align or change connecting rod.

Engine stops while idling: Incorrect low idle setting. Adjust low idling as recommended. The valve clearance is not adjusted. Adjust to proper valve clearance. Fuel injection pump failure. Install a new pump or rebuild.

Oil pressure is low: Not enough oil in the engine. Fill crankcase to proper oil level. Oil pump failure. Repair or change. Oil filter is dirty. Service or change engine oil filter element.

Kubota L3350 Transmission Troubleshooting

Transmission is making noise: Gears are damaged or backlash is incorrect. Change the gears or set backlash properly. Worn or damaged gear shift forks. Change defective shift forks. Shaft splines are damaged or worn. Change the shaft. Insufficient transmission fluid. Need to add transmission fluid. Worn or broken bearings. Change faulty bearings. Transmission oil is contaminated. Transmission oil change required.

Gears are hard to shift: Rusty or worn gear shift linkage. Replace or lubricate the shift linkage. Worn or unadjusted clutch. Adjust or change the clutch. Shift forks are bent or worn out. Shift forks need to be replaced. Defective parts in the gearshift mechanism. Replace defective parts.

Transmission oil pressure is low: Insufficient transmission fluid. Checking transmission fluid level and add if necessary. Transmission oil filter is clogged (if fitted). Service or change transmission oil filter. Defective relief valve. Change relief valve.

External fluid leaks: Damaged seals or gaskets. Replace worn seal or gaskets. Transmission fluid level is high. Correct the fluid level.

Kubota L3350 Hydraulic System Troubleshooting

Hydraulic system overheated: Hydraulic oil type is incorrect. Pour the correct type of oil. Hydraulic fluid contamination. Change hydraulic fluid. Air in hydraulic system. Bleed air from hydraulic system. Main relief valve is defective. Relief valve must be changed.

Hydraulic oil pressure too low: Insufficient hydraulic oil. Need to add oil. Clogged hydraulic oil filter. Change the hydraulic filter element or service if required. Leaking hydraulic lines. Check the system and repair leaks. Hydraulic control valve block is out of adjustment. Control valve needs to be adjusted. Hydraulic pump malfunction. Repair or replace hydraulic oil pump. Faulty hydraulic cylinder. Repair or install a new hydraulic cylinder.

3-point hitch won't lift or lifts slowly: Hydraulic pump malfunction. Repair or replace hydraulic fluid pump. Damaged main relief valve. Relief valve need to be replaced. Hydraulic spool valve block is faulty. Install a new hydraulic valve or repair it. Hydraulic cylinder not working. Repair or replace hydraulic cylinder. Hydraulic oil is insufficient. Checking hydraulic oil level and add if necessary. Dirty hydraulic fluid filter. Service or replace the hydraulic filter. Excessive loading on the hitch. Reduce loading.

Three-point hitch cannot be dropped or dropping is too slow: Broken hydraulic cylinder. Change or repair hydraulic cylinder. Hydraulic spool valve is out of adjustment. Spool valve adjustment required. Worn hitch rock shaft. Install a new shaft. Three-point hitch has not been adjusted. Need to make adjustments.

Hitch lifting or lowering is jerky: Hydraulic fluid contamination. Change hydraulic fluid. Hydraulic pump malfunction. Install a new hydraulic fluid pump. Air in the hydraulic system. Air bleeding. Hydraulic spool valve block is defective. Repair or change hydraulic valve. Hydraulic cylinder not working. Change or repair hydraulic cylinder.

Kubota L3350 Steering Troubleshooting

Steering wheel has too much free-play: Worn steering column coupling or shaft. Replace faulty part. Steering pump stopped working. Check the hydraulic steering pump and change if necessary. Steering linkage joints are worn or loose. Replace or repair steering linkage. Steering control valve has damage or wear. Replace or repair steering control valve as required. Steering box components are faulty. Replace defective parts of power steering box.

Difficult steering: Air lock in the steering system. Need to bleed air. Clogged steering filter element. Install new steering filter element. Steering oil level is insufficient. Checking steering oil level and add it if necessary. Steering control valve has damage or wear. Change or repair steering valve if required. Steering box components are worn. Replace defective parts of power steering box. Hydraulic steering pump is defective. Check the hydraulic steering pump and change if necessary. Steering pump control valve is worn or stuck. Clean or install new control valve. Damaged or incorrectly assembled steering column. Replace steering column or assemble correctly. Front tires are worn unevenly. Install new tires. Incorrect toe-in. Check toe-in and correct.

Front wheels wander to left or right: Steering box parts are faulty. Replace defective components of power steering box. Steering control valve is worn or defective. Replace or repair control valve as required. Not adjusted toe-in. Check toe-in and correct. Steering linkage assembly is worn or loose. Inspect and replace as required. Incorrectly adjusted or damaged front wheel bearings. Adjust correctly or change bearings. Tire pressure is uneven. Adjust the tire pressure.

Kubota L3350 Electrical System Troubleshooting

Battery won’t charge: Loose or corroded wire connections. Tighten or clean connections. Battery terminal connectors are faulty. Replace terminal connectors. Battery is defective. Replace the battery. Belt is defective or loose. Adjust belt tension or change the belt.

Starter turns slow: Low battery power. Battery is drained, recharge it. Battery is draining quickly. Service charging system or replace battery. Disconnected cables or faulty battery terminals. Check wire connections and change or service terminals.

Starter is not working: Battery is drained or worn. Charge or change the battery. Battery cables are disconnected or improperly connected. Inspect cables and connect properly. Battery power is low. Battery is drained, recharge it. Damaged starter motor. Replace or repair starter.