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Kubota B2620 Troubleshooting

Kubota B2620 Engine Troubleshooting

Engine hard to start or will not start: Fuel filter plugged. Filter maintenance required. Air in the fuel lines. Bleed the fuel lines. Fuel injection nozzles fault. Clean or replace injection nozzles. Fuel injection pump is not operating properly. Replace or rebuild injection pump.

Engine stalls while running: Timing of fuel injection pump is incorrect. Adjust the pump as required. Dirty fuel filter. Replace the filter element. Engine is not warmed up to the required temperature. Engine is not warmed up to the required temperature.

Diesel starts and stalls immediately: Fuel filter plugging. Filter maintenance required. Fuel injection pump is damaged. Install a new fuel pump or repair. Air filter plugged. Service air cleaner.

Engine overheats: Clogged radiator fins or damaged radiator cap. Replace cap or clean radiator. Insufficient coolant fluid. Refill to the correct level and inspect system for leaks. Excessive wear of the fan belt. The fan belt needs to be replaced. Engine oil level low. Need to add engine oil.

Engine power loss: Faulty or dirty injection nozzles. Check and replace nozzles if required. Restricted fuel lines or hoses. Clean fuel system lines and hoses. Plugged air cleaner. Clean or change. Leaking cylinder head gasket. Change cylinder head gasket.

Engine knocking sound or abnormal noise: Engine is cold. Normalize the temperature by warming up the engine. Engine oil level low. Fill the crankcase with engine oil. Fuel injection pump timing is wrong. Adjust according to specifications. Pistons are broken or worn. Replace the pistons as required. Misaligned or faulty connecting rod. Align or replace connecting rod.

Engine stalls at idle: Too low idle RPM. Adjust as required. Incorrect valve clearance. Adjustment procedure required. Fuel injection pump is broken. Install a new fuel pump or repair.

Oil pressure is insufficient: Low oil level. Need to add oil. Oil pump failure. Inspect and change as required. Clogged oil filter element. Clean or change engine oil filter.

Kubota B2620 Hydrostatic Transmission Troubleshooting

Excessive HST transmission noise: Speed control pedal linkage is bent or not adjusted. Repair or adjust linkage. Excessive transmission load. Load needs to be reduced. Oil is dirty or oil level is too low. Add oil to the correct level or fill the transmission with fresh oil. Defective relief valve. Change relief valve. Worn or defective parts of the hydrostatic transmission. Check hydrostatic transmission components for defect or damage and change if necessary.

Hot transmission oil: Transmission overloaded. Reduce loading. Cooling components are damaged or clogged. Inspect all cooling components and service or change if necessary. Lack of transmission oil supply. Need to add transmission oil. Transmission oil filter element clogging. Service or replace the transmission oil filter.

Lack of power: Insufficient transmission fluid. Checking transmission fluid level and add if necessary. Stuck relief valve. Replace relief valve. Defective or not adjusted speed control pedal linkage. Change or adjust linkage.

Transmission fluid leaking: Clogged oil drain line. Clean or replace drain line. Seals or gaskets are broken. Change defective seal or gaskets. Internal transmission housing pressure is too high. Change defective parts.

Kubota B2620 Hydraulic System Troubleshooting

Hydraulic system overheated: Incorrect type of hydraulic fluid. Use the correct type of fluid. Contaminated hydraulic fluid. Change hydraulic fluid. Air in the hydraulic system. Air bleeding. Main relief valve malfunction. Change relief valve.

Hydraulic oil pressure is low: Hydraulic fluid is insufficient. Fill the system to proper hydraulic fluid level. Dirty hydraulic fluid filter element. Clean or change hydraulic filter. Leaking hydraulic pipes. Inspect the system for leaks and fix it. Hydraulic control valve is out of adjustment. Need to make adjustment. Hydraulic pump not working. Install a new hydraulic oil pump. Faulty hydraulic cylinder. Repair or install a new hydraulic cylinder.

3-point hitch fails to lift or lifts slowly: Hydraulic pump failure. Replace or repair hydraulic fluid pump. Faulty main relief valve. Relief valve replacement required. Damaged hydraulic control valve. Change or repair hydraulic valve. Damaged hydraulic cylinder. Change or repair hydraulic cylinder. Hydraulic fluid level low. Checking hydraulic fluid level and add if necessary. Clogged hydraulic fluid filter element. Replace filter element or clean if required. Excessive loading on the hitch. Reduce the load is required.

Hitch cannot be dropped or dropping is too slow: Broken hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic spool valve block is not adjusted properly. The spool valve should be properly adjusted. Lift arm shaft is worn. Replace the shaft. The hitch is not adjusted. The three-point hitch must be adjusted.

Jerky lifting or lowering of three-point hitch: Dirty hydraulic oil. The oil must be changed. Hydraulic pump malfunction. Replace or repair hydraulic oil pump. Air in hydraulic system. Bleed air from hydraulic system. Defective hydraulic control valve block. Repair or replace hydraulic valve. Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder.

Kubota B2620 Steering System Troubleshooting

Excessive free play of steering wheel: Steering column coupling or shaft has maximum wear. Replace faulty part. Steering pump malfunction. Install a new steering pump. Steering linkage joints are worn or loose. Inspect and change as required. Hydrostatic steering unit has malfunction or wear. Inspect and change as required.

Excessive effort to steer: Air lock in hydraulic steering system. Bleed the steering system. Clogged steering filter element. Change steering filter element. Low steering oil level. Fill up the steering oil. Worn or defective hydrostatic steering unit. Replace or repair steering unit as required. Steering pump is worn. Install a new steering pump. Faulty or stuck pump flow control valve. Clean or replace control valve. Damaged or incorrectly assembled steering column. Replace steering column or assemble correctly. Uneven wear on front tyres. Replace the tyres. Incorrect toe-in. Check toe-in and correct. Steering cylinder leaks. Change worn piston seals or damaged piston rod.

Tractor is pulling to right or left: Hydrostatic steering unit has malfunction or wear. Inspect and change as required. Damaged steering cylinder. Change or repair steering cylinder. Incorrect toe-in. Adjust toe-in properly. Worn or loose steering linkage joints. Check and change as required. Defective or improperly adjusted front wheel bearings. Adjust properly or replace bearings. Front tyres are worn unevenly. Install new tyres.

Kubota B2620 Electrical Troubleshooting

Battery cannot be charged: Loose or corroded wire connections. Tighten or service connections. Electrical terminal connectors are defective. Change terminal connectors. Battery dead cell. Use a new battery. Loose or worn belt. Change belt or adjust belt tension.

Starter turning slow: Battery capacity is low. Battery needs to be recharged. Battery is draining quickly. Battery needs to be serviced or replaced. Disconnected battery cables or bad terminals. Check wire connections and change or service terminals.

Starter is not cranking: Battery is low or faulty. Charge or change the battery. Disconnected or incorrectly connected wires. Inspect battery wires and connect correctly. Battery capacity is low. Battery is drained, charge it. Starter motor is damaged. Starter should be replaced.