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Kubota BX1860 Troubleshooting

Kubota BX1860 Engine Troubleshooting

Diesel engine hard to start or doesn't start: Dirty fuel filter. Install new filter element. Air in fuel system. Bleed fuel system. Faulty fuel injection nozzles. Install a new kit of correctly balanced nozzles. Damaged fuel injection pump. Replacement or repair required.

Diesel shuts off while driving: Fuel injection pump timing is wrong. Check the fuel injection pump timing adjustment. Dirty fuel filter. Clean the filter or install new filter element. Low coolant temperature. Engine is not warmed up to the required temperature.

Diesel starts and stops: Dirty fuel filter. Service the filter. Faulty fuel injection pump. Install a new pump or rebuild. Restricted intake air. Clean or replace element.

Engine overheated: Radiator core is clogged or radiator cap is leaking. Clean radiator or install new cap. Not enough coolant. Fill radiator to proper level and check components for faults. Fan belt is loose or defective. Fan belt must be replaced. Engine oil level is low. Add oil to the engine crankcase.

Engine is not running at maximum power: Fuel injection nozzles are damaged. Replace injection nozzles. Fuel hoses or lines are dirty. Clean fuel hoses and lines. Dirty air cleaner. Clean air cleaner element. Leaking cylinder head gasket. Cylinder-head gasket replacement required.

Engine noise or knocking: Engine has not warmed up to the recommended temperature. Warm up engine as required. Engine oil level is insufficient. Fill up the engine oil. Wrong setting of fuel injection pump timing. Adjust fuel injection pump as required. Pistons are broken or worn. Replace the pistons as required. Misaligned or defective connecting rod. Align or change connecting rod.

Engine stops while idling: Wrong adjustment of low idle speed. Adjust low idle speed. Incorrect valve clearance. Adjustment procedure required. Fuel injection pump malfunction. Replace or rebuild injection pump.

Insufficient oil pressure: Engine oil insufficient. Fill the crankcase with oil. Oil pump is defective. Inspect and change as required. Oil filter clogging. Clean or replace engine oil filter element.

Kubota BX1860 Hydrostatic Transmission Troubleshooting

HST transmission is making noise: Speed control pedal linkage is damaged or out of adjustment. Repair or adjust linkage. Transmission overloaded. Reduce loading. Transmission oil is contaminated or oil level is insufficient. Fill to required level or change the transmission oil. Relief valve is stuck. Install a new valve. Defective or worn transmission parts. After disassembly and inspection, replace defective components.

Transmission fluid overheated: Excessive transmission load. The load should be reduced. Cooling components are plugged or defective. Check all cooling components and repair or change if required. Transmission oil level is low. Fill the transmission housing to proper oil level. Transmission fluid filter element is clogged. Replace or service transmission fluid filter.

Loss of power: Lack of transmission oil supply. Add oil to the transmission housing. Relief valve malfunction. Install a new relief valve. Speed control linkage is worn or unadjusted. Adjust or change linkage.

Transmission oil leaking: Oil return tube is plugged. Clean or replace the tube. Worn seals or gaskets. Install new gaskets or seal. Internal transmission housing pressure is too high. Change defective parts.

Kubota BX1860 Hydraulics Troubleshooting

Excessive hydraulic system heat: Improper type of hydraulic oil. Use the proper type of oil. Contaminated hydraulic oil. Change hydraulic oil. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve is defective. Install a new relief valve.

Hydraulic oil pressure too low: Hydraulic fluid level low. Add fluid as required. Hydraulic oil filter is clogged. Service or replace the hydraulic filter. Leaking hydraulic lines. Inspect the system for leaks and fix it. Incorrect setting hydraulic control valve. Use the correct adjustment. Defective hydraulic pump. Repair or replace hydraulic oil pump. Hydraulic cylinder failure. Repair or install a new hydraulic cylinder.

3-point hitch fails to lift or lifts slowly: Defective hydraulic pump. Change or repair hydraulic fluid pump. Main relief valve malfunction. Install a new relief valve. Hydraulic spool valve block is faulty. Install a new hydraulic valve or repair it. Hydraulic cylinder malfunction. Repair or install a new hydraulic cylinder. Insufficient hydraulic fluid. Add fluid as required. Dirty hydraulic oil filter element. Install a new hydraulic filter element. Hitch is under excessive load. The load should be reduced.

3-point hitch won't lower or lowers slowly: Hydraulic cylinder is defective. Repair or install a new hydraulic cylinder. Incorrect adjusted hydraulic control valve. Adjust correctly. Damaged hitch rock shaft. Replace the shaft. Three-point hitch is out of adjustment. Adjust the hitch.

Hitch lift or lower is jerky: Dirty hydraulic oil. The oil must be changed. Damaged hydraulic pump. Repair or replace hydraulic fluid pump. Air in hydraulic pipes. Bleed hydraulic pipes. Defective hydraulic control valve. Repair or replace hydraulic valve. Hydraulic cylinder is broken. Repair or change hydraulic cylinder.

Kubota BX1860 Steering System Troubleshooting

Excessive play in steering: Steering column coupling or shaft is worn. Replace defective part. Faulty steering pump. Install a new steering pump. Worn or loose steering linkage joints. Change or repair steering linkage. Defective or worn hydrostatic steering unit. Check and replace as required.

Stiff steering: Air in steering system. Need to bleed air. Clogged steering filter. Replace steering filter element. Not enough steering fluid. Fill up steering fluid to required level. Hydrostatic steering unit has damage or wear. Replace or repair steering unit as required. Steering pump stopped working. Replace or repair steering pump. Steering pump control valve is stuck or faulty. Install a new flow control valve or clean it. Worn or incorrectly fitted steering column. Replace the steering column or refit it correctly. Uneven wear on front tyres. Replace the tyres. Not adjusted toe-in. Adjust toe-in properly. Steering cylinder is leaking. Change worn piston seals or damaged piston rod.

Tractor is pulling to right or left: Hydrostatic steering unit has malfunction or wear. Check and replace as required. Steering cylinder is defective. Repair or change steering cylinder. Not adjusted toe-in. Adjust toe-in wheels. Loose or worn steering linkage components. Inspect and replace as required. Improperly adjusted or worn front wheel bearings. Replace or adjust the bearings correctly. Uneven tire pressure. Inflate the tires properly.

Kubota BX1860 Electrical Troubleshooting

Battery cannot be charged: Corroded or loose wire connections. Tighten or service connections. Battery terminal clamps are faulty. Install new terminal clamps. Dead cell in battery. Use a new battery. Belt is damaged or loose. Adjust belt tension or replace belt.

Starter turning slow: Low battery output voltage. Battery is drained, recharge it. Battery won’t hold charge. Service battery or replace it. Battery cables are disconnected or terminals are faulty. Connect cables correctly or replace terminals.

Starter does not work: Battery is drained or worn. Recharge or change battery. Wiring is incorrectly connected or disconnected. Inspect wiring and connect correctly. Low battery voltage. Low battery charging, charge as required. Starter motor is defective. Starter should be changed.