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Kubota B1550 Troubleshooting

Kubota B1550 Diesel Engine Troubleshooting

Diesel hard to start or doesn't start: Fuel filter element is dirty. Filter maintenance required. Air in the fuel pipes. Bleed the fuel pipes. Fuel injection nozzles are faulty or clogged. Check and replace nozzles if required. Faulty fuel injection pump. Rebuild or change fuel pump.

Engine shuts off suddenly during operation: Wrong setting of fuel injection pump timing. Check the fuel injection pump timing adjustment. Fuel filter plugging. Change filter element. Engine is not fully warmed up. Warm up to required temperature.

Diesel starts but stalls suddenly: Fuel filter element is dirty. Change filter element. Fuel injection pump is not working correctly. Replace or rebuild injection pump. Dirty air cleaner. Replace air filter element.

Engine is overheated: Clogged radiator core or damaged radiator cap. Clean radiator or change cap. Lack of engine coolant. Add coolant and check the components of cooling system. Fan belt slipping or worn. Belt replacement is recommended. Not enough engine oil. Fill up the oil to required level.

Lack of engine power: Clogged or burnt injection nozzle. Service or change injection nozzles. Fuel hoses or lines are dirty. Fuel lines and hoses need to be cleaned. Air filter is clogged. Clean air cleaner element. Cylinder head gasket is blown. Replace cylinder head gasket.

Engine knocks or noises: Engine is not preheated. Warm up to required temperature. Not enough engine oil. Fill up the oil to required level. Improper fuel injection timing. Check the fuel injection pump timing adjustment. Broken or worn pistons. Have pistons replaced. Faulty or misaligned connecting rod. Need to replace or align the connecting rod.

Engine stops at idle: Wrong adjustment of low idle speed. Need to adjust idle speed. Valve clearance is out of adjustment. Need to adjust valve clearance. Fuel injection pump is not operating properly. Repair or install new pump.

Insufficient oil pressure: Low crankcase oil level. Add oil to the engine crankcase. Oil pump failure. Replace as required. Plugged engine oil filter. Service or change engine oil filter element.

Kubota B1550 Transmission Troubleshooting

Transmission noise: Gears are defective or backlash is improper. Install new gears and adjust backlash properly. Shift forks are bent or worn out. Change defective shift forks. Damaged or worn shaft splines. Replace defective shaft. Transmission oil insufficient. Check and refill the transmission oil. Worn or broken bearings. Bearings replacement required. Transmission oil is dirty. Transmission oil change required.

Gear shift is hard: Gear shift linkage is worn or rusty. Install new shift linkage. Malfunction or incorrect clutch adjustment. Clutch replacement or adjustment required. Shift forks are worn or bent. Change the shift forks. Worn gear shifting mechanism. Repair or change worn components if necessary.

Lack of transmission oil pressure: Transmission fluid level is low. Check and refill the transmission fluid. Transmission oil filter is dirty (if equipped). Service or change transmission oil filter. Defective relief valve. Change the valve.

External fluid leaks: Seals or gaskets are worn. Seals and gaskets need to be replaced. Too much fluid in transmission. Excess fluid must be drained.

Hydrostatic Transmission Troubleshooting

Hydrostatic transmission is making noise: Bent or unadjusted speed control pedal linkage. Adjust or repair linkage. Excessive loading. Reduce the load is required. Dirty transmission fluid or insufficient fluid level. Fill to required level or change the fluid. Relief valve malfunction. Change relief valve. Transmission components are damaged or worn. Replace or repair defective components.

Transmission fluid is too hot: Excessive loading. Reduce loading. Cooling components are defective or plugged. Check all cooling components and repair or change if required. Transmission oil level is low. Add oil to the transmission housing. Dirty transmission fluid filter. Clean or change transmission fluid filter.

Low power: Transmission oil insufficient. Fill up the transmission oil. Relief valve malfunction. Replace relief valve as required. Defective or not adjusted speed control pedal linkage. Adjust or change linkage.

External oil leaks: Clogged transmission fluid return pipe. Clean or change return pipe. Seals or gaskets are broken. Change defective gaskets or seal. Transmission case internal pressure is too high. Check hydrostatic transmission components for defect or damage and change if necessary.

Kubota B1550 Hydraulics Troubleshooting

Hydraulic system overheated: Hydraulic fluid type is improper. The proper type of fluid must be used. Contaminated hydraulic oil. Change hydraulic oil. Air in hydraulic system. Bleed air from hydraulic system. Main relief valve malfunction. Relief valve need to be replaced.

Hydraulic oil pressure is low: Insufficient hydraulic oil. Check and refill the hydraulic oil. Clogged hydraulic fluid filter. Change hydraulic filter element or clean if necessary. Leaking hydraulic pipes. Inspect hydraulic system for leaks and repair it. Incorrect setting hydraulic control valve. Use the correct adjustment. Damaged hydraulic pump. Install a new hydraulic oil pump. Broken hydraulic cylinder. Repair or install a new hydraulic cylinder.

Hitch won't raise or raises slowly: Faulty hydraulic pump. Install a new hydraulic fluid pump. Damaged main relief valve. Relief valve replacement required. Defective hydraulic control valve block. Replace or repair the valve. Faulty hydraulic cylinder. Change or repair hydraulic cylinder. Low hydraulic fluid level. Add fluid as required. Clogged hydraulic fluid filter element. Replace filter element or clean if required. Hitch is under excessive load. Reduce loading.

Hitch cannot be lowered or lowering is too slowly: Broken hydraulic cylinder. Install a new hydraulic cylinder or repair it. Incorrect setting hydraulic spool valve. Use the correct setting. Hitch cross shaft is damaged. Replace the shaft. Three-point hitch is out of adjustment. Adjust the 3-point hitch.

Hitch lifting or lowering is jerky: Contaminated hydraulic oil. Change hydraulic oil. Faulty hydraulic pump. Replace or repair hydraulic fluid pump. Air trapped in hydraulic system. Bleed air from system. Hydraulic spool valve is faulty. Repair or replace the valve. Hydraulic cylinder is broken. Change or repair hydraulic cylinder.

Kubota B1550 Steering System Troubleshooting

Excessive play in steering: Steering column shaft or coupling is worn out. Replace faulty part. Damaged hydraulic steering pump. Install a new hydraulic steering pump. Steering linkage joints are worn or loose. Check and change as required. Steering control valve is worn or defective. Check and replace as required. Power steering box parts have malfunctions. Repair power steering gearbox.

Difficult steering: Air lock in the steering system. Bleed air. Steering filter clogging. Change steering filter element. Not enough steering oil. Check oil level and add steering oil as required. Steering control valve is worn or defective. Repair or change. Power steering box components are worn out. Defective parts of power steering gearbox must be replaced. Steering pump not working. Replace or repair steering pump. Faulty or stuck pump flow control valve. Flush or change flow control valve. Incorrectly mounted or defective steering column. Mount the steering column correctly or replace it. Front tires wear unevenly. Change the tires. Not adjusted toe-in. Adjust toe-in wheels.

Front wheels wander to right or left: Steering box components are faulty. Change defective steering box parts. Steering control valve has malfunction or wear. Replace or repair steering control valve as required. Improper toe-in. Adjust toe-in wheels. Worn or loose steering linkage joints. Check and change as required. Worn or incorrectly adjusted or worn front wheel bearings. Change or adjust bearings correctly. Tyre pressure is uneven. Adjust the tyre pressure.

Kubota B1550 Electrical Troubleshooting

Battery will not charge: Loose or corroded cable connections. Tighten or service cable connections. Battery terminal clamps are faulty. Terminal clamps need to be replaced. Defective battery. Install a new battery. Loose or defective belt. Need to adjust belt tension or replace belt.

Starter turning slow: Low battery power. Battery is drained, recharge it. Battery drains quickly. Battery needs service or replacement. Bad terminals or disconnected battery cables. Check battery wires and service or replace terminals.

Starter will not crank: Battery is discharged or defective. Recharge or replace battery. Battery wires are disconnected or incorrectly connected. Check wires and connect correctly. Battery voltage is low. Battery is drained, charge it. Starter motor is faulty. Starter should be changed.