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Kubota B2920 Troubleshooting

Kubota B2920 Diesel Engine Troubleshooting

Diesel hard to start or doesn't start: Fuel filter element is dirty. Change filter element. Air in fuel system. Bleed fuel system. Dirty or damaged injection nozzles. Check injection nozzles and replace if required. Fuel injection pump is defective. Replace or rebuild injection pump.

Engine shuts off suddenly during operation: Fuel injection pump timing is not adjusted. Set the fuel pump timing correctly. Fuel filter element is clogged. Clean the filter or install new filter element. Engine is not preheated. Warm up the engine.

Diesel starts but stalls suddenly: Dirty fuel filter. Change filter element. Faulty fuel injection pump. Install a new pump or rebuild. Air filter element clogged. Clean or change the filter.

Engine overheated: Radiator core is dirty or radiator cap is damaged. Clean radiator or install new cap. Insufficient coolant. Refill to the correct level and inspect system for leaks. Broken or loose fan belt. Replace the fan belt. Engine oil level is insufficient. Need to add engine oil.

Loss of engine power: Faulty fuel injection nozzles. Inspect nozzles and replace if necessary. Fuel hoses or lines are dirty. Service fuel lines and hoses. Air filter plugged. Replace air filter element. Worn cylinder head gasket. Cylinder-head gasket replacement required.

Engine knocks or noises: Low coolant temperature. Warm up the engine. Not enough engine oil. Fill up the oil to required level. Fuel injection pump timing is wrong. Adjust the pump as required. Pistons are broken or worn. Replace the pistons as required. Misaligned or faulty connecting rod. Need to change or align the connecting rod.

Engine stalls while idle: Low idle speed set incorrectly. Correct the settings. Valve clearance is wrong. Need to adjust valve clearance. Fuel injection pump is broken. Rebuild or replace pump.

Oil pressure too low: Low crankcase oil level. Fill the crankcase with oil. Worn oil pump. Repair or change. Clogged oil filter element. Clean or change engine oil filter.

Kubota B2920 Hydrostatic Transmission Troubleshooting

HST transmission noises: Worn or unadjusted speed control linkage. Repair or adjust linkage. Transmission overload. The load should be reduced. Contaminated transmission fluid or low fluid level. Add fluid to the correct level or fill the transmission with fresh fluid. Relief valve is stuck. Replace relief valve. Worn or defective parts of the hydrostatic transmission. After disassembly and inspection, replace defective components.

Transmission fluid overheats: Transmission is under excessive load. Load needs to be reduced. Cooling components are plugged or defective. Check all cooling components and repair or change if required. Transmission fluid level is low. Check and refill the transmission fluid. Clogged transmission oil filter element. Clean or change transmission oil filter.

Power is insufficient: Transmission fluid insufficient. Checking transmission fluid level and add if necessary. Relief valve failure. Replace relief valve. Bent or unadjusted speed control pedal linkage. Adjust or replace linkage.

External fluid leaks: Oil drain line is clogged. Clean or change the line. Worn seals or gaskets. Replace worn seal or gaskets. Internal transmission housing pressure is too high. Change defective parts.

Kubota B2920 Hydraulics Troubleshooting

Hydraulic system overheated: Hydraulic oil type is wrong. Correct type of oil must be used. Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Air in the hydraulic system. Air bleeding. Main relief valve failure. Relief valve replacement required.

Hydraulic fluid pressure is insufficient: Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Hydraulic oil filter element is clogged. Change the hydraulic filter element or service if required. Leaks in hydraulic pipes. Check the hydraulic system and fix leaks. Incorrect setting hydraulic spool valve. Use the correct setting. Hydraulic pump failure. Change or repair hydraulic oil pump. Damaged hydraulic cylinder. Replace or repair hydraulic cylinder.

Hitch can't lift or lifts too slowly: Hydraulic pump malfunction. Replace or repair hydraulic oil pump. Faulty main relief valve. Change relief valve. Hydraulic control valve block is faulty. Repair or replace hydraulic valve. Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder. Insufficient hydraulic fluid. Add fluid as required. Clogged hydraulic oil filter. Clean or replace the hydraulic filter. Excessive hitch loading. Reduce hitch load.

3-point hitch does not lower or lowers very slowly: Hydraulic cylinder is faulty. Change or repair hydraulic cylinder. Hydraulic spool valve is out of adjustment. Spool valve adjustment required. Hitch cross shaft is worn. Replace the shaft. Three-point hitch is out of adjustment. Adjust the 3-point hitch.

Hitch lower or lift is jerky: Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Hydraulic pump malfunction. Repair or replace hydraulic fluid pump. Air trapped in hydraulic system. Bleed air from system. Hydraulic spool valve is defective. Repair or change hydraulic valve. Defective hydraulic cylinder. Repair or replace hydraulic cylinder.

Kubota B2920 Steering System Troubleshooting

Excessive play in steering: Steering column shaft or coupling is worn out. Replace defective part. Faulty steering pump. Install a new steering pump. Steering linkage joints are worn or loose. Replace or repair steering linkage. Hydrostatic steering unit has malfunction or wear. Repair or change the steering unit.

Hard Steering: Air in the hydraulic steering system. Bleed the steering system. Steering filter is dirty. Clean steering filter element. Not enough steering oil. Check oil level and add steering oil as required. Hydrostatic steering unit has damage or wear. Repair or replace the steering unit. Steering pump failure. Install a new steering pump. Steering pump control valve is stuck or faulty. Service or change control valve. Incorrectly mounted or defective steering column. Mount the steering column correctly or replace it. Tire pressure uneven. Inflate the tires correctly. Not adjusted toe-in. Check and adjust toe-in. Leaking steering cylinder. Replace worn seal sleeves or damaged piston rod.

Tractor pulls to right or left: Steering unit has malfunction or wear. Inspect and replace as required. Steering cylinder is defective. Change or repair steering cylinder. Incorrect toe-in. Check and adjust toe-in. Steering linkage components are loose or worn. Change or repair steering linkage. Improperly adjusted or defective front hub bearings. Adjust correctly or install new bearings. Uneven wear on front tires. Replace the tires.

Kubota B2920 Electrical Troubleshooting

Battery does not charge: Electrical wire connections are corroded or loose. Tighten or clean electrical wiring connections. Defective battery terminal clamps. Terminal clamps should be changed. Worn-out battery. Battery replacement required. Loose or defective belt. Replace belt or adjust belt tension.

Starter turns slowly: Battery voltage is low. Charge the battery. Battery runs out quickly. Service charging system or change battery. Battery terminals are corroded or wires are disconnected. Check cables and service or change terminals.

Starter does not work: Battery is low or faulty. Battery needs to be recharged or replaced. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery output voltage. Battery needs to be recharged. Starter motor is faulty. Repair or install a new starter.