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Kubota BX1850 Troubleshooting

Kubota BX1850 Engine Troubleshooting

Engine hard to start or won't start: Fuel filter element is dirty. Change filter element. Air in the fuel system. Air bleeding. Dirty or damaged injection nozzles. Check injection nozzles and replace if required. Fuel injection pump is damaged. Repair or install new pump.

Engine stops unexpectedly during operation: Timing of fuel injection pump is incorrect. Set the fuel pump timing correctly. Fuel filter element is dirty. Replace the filter element. Coolant temperature is low. Warm up the engine.

Diesel starts and then shuts off: Fuel filter plugged. Service or replace the filter. Faulty fuel injection pump. Rebuild or change fuel pump. Plugged air filter. Air filter maintenance required.

Engine is overheated: Defective radiator cap or clogged radiator fins. Clean radiator or install new cap. Engine has a lack of coolant. Add coolant fluid and inspect the cooling system for leaks. Loose or defective fan belt. Replace the fan belt. Insufficient engine oil. Add oil to the engine crankcase.

Poor engine power: Damaged or dirty injection nozzles. Clean or replace injection nozzles. Fuel hoses or lines are clogged. Clean fuel system lines and hoses. Dirty air cleaner. Replace air filter element. Worn cylinder head gasket. Install a new gasket.

Engine knocking sound or abnormal noise: Engine has not warmed up to the recommended temperature. Normalize the temperature by warming up the engine. Not enough engine oil. Fill up the engine oil. Fuel injection pump timing is wrong. Adjust according to specifications. Pistons are scored or worn. Pistons replacement required. Connecting rod is worn or not aligned. Align or change connecting rod.

Engine stalls at low idle speed: Incorrectly set low idle speed. Normalize low idle speed. Valve clearance is wrong. Have it adjusted. Damaged fuel injection pump. Repair or install new pump.

Oil pressure is insufficient: Lack of oil. Need to add oil. Oil pump failure. Inspect and change as required. Oil filter element is dirty. Clean or replace engine oil filter element.

Kubota BX1850 Hydrostatic Transmission Troubleshooting

Excessive hydrostatic transmission noise: Speed control linkage is defective or unadjusted. Adjust or change linkage. Transmission is under excessive load. Load needs to be reduced. Contaminated transmission fluid or low fluid level. Fill to required level or change the fluid. Defective relief valve. Replace relief valve. Worn or defective parts of the hydrostatic transmission. After disassembly and inspection, replace defective components.

Transmission overheats: Transmission is under excessive load. Reduce the load is required. Cooling components are damaged or clogged. Check all cooling components and clean or replace if required. Low fluid level. Fill the transmission housing to proper fluid level. Dirty transmission fluid filter. Service or change transmission fluid filter.

Power is insufficient: Lack of transmission fluid. Fill the transmission housing to proper fluid level. Stuck relief valve. Replace relief valve. Speed control pedal linkage is bent or not adjusted. Change or adjust linkage.

Transmission oil leakage: Clogged oil drain line. Clean or replace drain line. Damaged gaskets or seals. Change defective seal or gaskets. Internal transmission housing pressure is too high. Check transmission parts for damage or wear and replace if required.

Kubota BX1850 Hydraulics Troubleshooting

Hydraulic system is too hot: Wrong hydraulic oil type. Fill up with the correct type of oil. Hydraulic fluid is dirty. Hydraulic fluid change required. There is air in the hydraulic system. Bleed hydraulic system. Main relief valve is faulty. Install a new relief valve.

Low hydraulic fluid pressure: Low hydraulic oil level. Need to add oil. Hydraulic oil filter element is clogged. Replace filter element or clean if required. Leaking hydraulic pipes. Inspect the system for leaks and fix it. Hydraulic control valve block is set improperly. Set properly. Damaged hydraulic pump. Install a new hydraulic fluid pump. Hydraulic cylinder is faulty. Repair or change hydraulic cylinder.

Hitch does not raise or raises very slowly: Damaged hydraulic pump. Install a new hydraulic oil pump. Main relief valve is defective. Relief valve must be changed. Hydraulic spool valve block is defective. Replace or repair the valve. Broken hydraulic cylinder. Replace or repair hydraulic cylinder. Insufficient hydraulic oil. Checking hydraulic oil level and add if necessary. Hydraulic oil filter is clogged. Clean the hydraulic filter or install new filter element. Heavy load on the hitch. The load should be reduced.

Hitch cannot be dropped or dropping is too slow: Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder. Hydraulic spool valve is out of adjustment. Spool valve adjustment required. Lift arm shaft is damaged. Change the shaft. The hitch is not adjusted. Adjust three-point hitch as required.

Hitch lifting or lowering is jerky: Dirty hydraulic fluid. The fluid must be changed. Hydraulic pump not working. Install a new hydraulic fluid pump. There is air in the hydraulic system. Bleed hydraulic system. Damaged hydraulic spool valve. Repair or replace hydraulic valve. Hydraulic cylinder is defective. Repair or install a new hydraulic cylinder.

Kubota BX1850 Steering System Troubleshooting

Excessive play in steering: Steering column coupling or shaft has maximum wear. Change defective part. Steering pump stopped working. Repair or replace steering pump. Steering linkage parts are loose or worn. Inspect and replace as required. Hydrostatic steering unit has wear or damage. Change or repair steering unit if required.

Excessive effort to steer: Air in steering system. Bleed the system of air. Steering filter clogging. Service or replace the steering filter. Lack of steering fluid. Need to add steering oil. Hydrostatic steering unit is defective or worn. Check and replace as required. Steering pump is worn. Repair or replace steering pump. Pump flow control valve is stuck or worn. Clean or install new control valve. Improperly assembled or defective steering column. Reassemble or change the steering column. Front tyres wear unevenly. Change the tyres. Incorrect toe-in. Check toe-in and correct. Leaking steering cylinder. Replace damaged piston seals or worn piston rod.

Tractor pulls to right or left: Hydrostatic steering unit is defective or worn. Check and replace as required. Steering cylinder is worn. Change or repair steering cylinder. Incorrect toe-in. Adjust toe-in properly. Worn or loose steering linkage assembly. Repair or change steering linkage. Improperly adjusted or worn front wheel bearings. Change or adjust the bearings properly. Tires have uneven wear. Replace the tires.

Kubota BX1850 Electrical Troubleshooting

Battery will not charge: Electrical cable connections are loose or corroded. Tighten or service cable connections. Battery terminal connectors are defective. Terminal connectors should be replaced. Battery faulty cell. Install a new battery. Loose or damaged belt. Belt needs to be adjusted or replaced.

Starter turns slow: Low battery output. Low battery charging, charge as required. Battery drains quickly. Battery needs service or replacement. Bad battery terminals or disconnected wiring. Connect wires properly or change terminals.

Starter motor won't turn: Battery is drained or worn. Recharge or replace battery. Disconnected or improperly connected wiring harness. Inspect battery wiring harness and connect as required. Low battery power. Low battery charging, charge as required. Starter motor is damaged. Starter needs to be changed.