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Kubota L3250 Troubleshooting
The
Kubota L3250 is a two-wheel drive or two-wheel drive compact utility tractor.
This model was manufactured from 1989 to 1990. The tractor was designed in 2
versions: L3250F (2WD) and L3250DT (4WD).
The Kubota L3250 is equipped with a 113.6 cubic inches (1.9L) Kubota
V1902-DI 4-cycle vertical 4-cylinder direct injection naturally
aspirated water-cooled diesel engine with a rated power of 40 hp (29.8
kW). The transmission includes a dry clutch and mechanical shuttle
gearbox with 8 forward and 7 reverse gears.
The maximum travel speed (forward and reverse): 13.5 mph (21.7 km/h) /
13.5 mph (21.7 km/h). The open center hydraulic system includes a gear
pump with a flow of 7.8 gal/min (29.5 l/min). The hydraulic pressure is
172 bar (2500 psi). The Kubota L3250 is equipped with a power assist
steering system, mechanical wet disc brakes, 6.00x16 (AG) or 29x12.50-15
(Turf) front tires, and 13.6x26 (AG) or 21.5x16.1 (Turf) rear tires. The
wheelbase is 68.3" (1730 mm). The tractor is compatible with a
Kubota
BF550 front-end loader with lift capacity to full height of 1213 lbs
(550 kg) and breakout force of 2094 lbs (950 kg).
| Engine Troubleshooting |
| Engine won't start or hard to start |
| Fuel filter is clogged - Filter maintenance required |
| Fuel is not supplied from the tank to the system - Check the fuel shut-off valve |
| Air in fuel pipes - Bleed fuel pipes |
| Fuel injectors are clogged or faulty - Service or change fuel injectors |
| Fuel injection pump damage - Repair or install new pump |
| Engine has bad compression - Inspect and replace faulty parts |
| Engine stalls during operation |
| Low coolant temperature - Warm up to required temperature |
| There is air in the fuel system - Bleed the system |
| Fuel injection failed - Use correct settings |
| Fuel filter plugging - Clean or replace the filter |
| Dirty or faulty injectors - Service or change fuel injectors |
| Engine starts and immediately stalls |
| Timing of fuel injection pump is not adjusted - Repair or replace fuel injection pump |
| Fuel filter clogging - Install new filter element |
| Fuel injector nozzles are dirty or defective - Service or replace injector nozzles |
| Fuel injection pump is not working correctly - Rebuild or change fuel pump |
| Air cleaner clogging - Service or change air cleaner |
| Low idle speed set incorrectly - Normalize low idle speed |
| Fuel injection pump failure - Repair or install a new fuel pump |
| Fuel injector nozzles are damaged or dirty - Replace fuel injector nozzles |
| The valve clearance is incorrect - Correct valve clearance |
| Insufficient coolant - Coolant needs to be refilled. Check and repair damage to the cooling system if required |
| Cooling system is clogged or cooling parts are defective - Replace faulty parts or flush the cooling system |
| Engine oil insufficient - Fill up the oil to required level |
| Worn fan belt or improper belt tension - Adjust properly or replace the belt |
| Defective or wrong type of thermostat - Thermostat needs to be replaced |
| Fuel injectors are clogged or faulty - Service or change fuel injectors |
| Uneven fuel injection pressure - Correct the pressure settings |
| Clogged air filter element - Replace filter or install new filter element |
| Plugged engine oil filter - Clean or change engine oil filter |
| Diesel engine is overloaded - Load reducing required |
| Valve out of adjustment - Check and adjust |
| Incorrect low idle speed adjustment - Normalize low idle speed |
| Restricted fuel pipes or hoses - Fuel pipes and hoses need to be cleaned |
| Engine compression is low: Inlet or outlet valves are defective - Valves need to be replaced |
| Fuel injection pump timing is incorrect - Correct injection timing |
| Fuel injector nozzles are faulty - Replace fuel injector nozzles |
| Engine oil level low - Fill the crankcase with engine oil |
| Engine is not warmed up to the required temperature - Warm up the engine |
| Worn main bearings or crankshaft - Replace crankshaft or bearings |
| Stuck or worn piston rings - Have piston rings replaced |
| Loose flywheel bolts - Inspect flywheel bolts and tighten properly |
| Diesel engine using too much oil |
| External oil leaks: Gaskets or seals are excessively worn - Change to repair leaks |
| Crankcase oil too light - Use correct viscosity oil |
| Worn or stuck piston rings - Replace piston rings |
| Damaged valve stems or valve guides - Valves must be replaced |
| Worn pistons or cylinder liners - Inspect pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Worn-out battery - Battery replacement required |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Loose or corroded terminals and cables - Terminals and cables need to be tightened or cleaned |
| Belt wear or improper belt tension adjustment - Adjust belt tension as required or replace belt |
| Starter motor cranks slow |
| Battery power is low - Battery needs to be recharged |
| Battery won’t hold charge - Service charging system or replace battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Corroded or loose battery cables and terminals - Terminals and cables need to be tightened or cleaned |
| Low battery voltage - Charge the battery |
| Discharged or worn battery - Battery needs to be recharged or replaced |
| Damaged starter motor - Starter needs to be changed |
| Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Clutch is unadjusted or worn - Adjust or replace the clutch |
| Gear shift linkage is loose or broken - Repair or change shift linkage |
| Worn or damaged shift forks - Change the shift forks |
| Gearshift mechanism failure - Change or repair failed components |
| Lack of transmission oil pressure |
| Oil level is low - Check transmission oil level and add oil as required |
| Plugged transmission fluid filter (if equipped) - Change or service the transmission fluid filter |
| Relief valve is defective - Change the valve |
| Cracked or worn bearings - Faulty bearings should be replaced |
| Not enough oil in transmission - Add transmission oil as required |
| Dirty transmission oil - Transmission oil must be changed |
| Backlash is incorrect or gears are worn - Change the gears or adjust backlash correctly |
| Shift forks are damaged or worn - Shift forks need to be replaced |
| Gaskets or seals are damaged - Change defective seal or gaskets |
| Transmission case is cracked - Replace case or transmission assembly |
| Hydraulics Troubleshooting |
| Excessive hydraulic system heat |
| Incorrect hydraulic system pressure setting - Change the pressure settings |
| Main relief valve is damaged or adjusted improperly - Adjust or replace the relief valve |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Aeration in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Hydraulic oil pressure is low |
| Lack of hydraulic oil - Fill the hydraulic system with oil |
| Dirty hydraulic oil filter - Install a new hydraulic filter element |
| Hydraulic pump is faulty - Test pump performance and replace pump if necessary |
| Defective or not adjusted hydraulic control valve - Adjust properly or replace |
| Hydraulic cylinder is broken - Inspect cylinder components for wear or damage and change if required |
| Leakage in hydraulic lines - Inspect hydraulic system for leaks and repair it |
| Hitch cannot be lifted or lifting is too slow |
| Not enough hydraulic oil in the system - Check oil level and add hydraulic oil as required |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Dirty hydraulic oil filter - Service the hydraulic filter or change if required |
| Hydraulic pump not working - Test the pump flow rate and change pump if required |
| Unadjusted or defective main relief valve - Set up or change the relief valve |
| Hydraulic spool valve is faulty or out of adjustment - Set properly or replace |
| Hydraulic cylinder is broken - Inspect cylinder components for damage or wear and change if required |
| Broken or disconnected suction line - Connect or replace |
| Hitch can't drop or drops too slowly |
| Hydraulic spool valve is not set properly or defective - Replace or set properly |
| Hydraulic cylinder malfunction - Inspect cylinder parts for wear or damage and replace if required |
| Damaged hitch rock shaft - Install a new shaft |
| Hitch has mechanical defects - Replace worn or damaged hitch parts |
| Jerky lifting or lowering of 3-point hitch |
| Hydraulic system sucks air - Check the suction line, pump seals, and fittings |
| Dirty hydraulic oil - The oil must be changed |
| Faulty hydraulic oil pump - Check the pump capacity and replace pump if required |
| Hydraulic spool valve is defective or set improper - Replace or adjust properly |
| Broken hydraulic cylinder - Inspect cylinder components for wear or damage and change if required |
| Steering System Troubleshooting |
| Difficult steering |
| Steering column is broken or improperly installed - Steering column must be installed properly or replaced |
| Air leaks in steering system - Bleed air |
| Incorrect toe-in - Adjust toe-in wheels properly |
| Tire pressure is not correct - Check tire pressure and inflate as required |
| Worn steering pump - Repair or change steering pump |
| Worn or defective steering valve assembly - Inspect and replace as required |
| Faulty power steering box components - Replace defective parts of power steering box |
| Low steering fluid level - Fill the steering system with fluid |
| Oil leaks in the steering system - Retighten joints of the hydraulic steering pipes and hoses |
| Steering wheel free play is excessive |
| Steering column coupling or shaft is extremely worn out - Change faulty part |
| Defective or worn steering valve assembly - Inspect and change as required |
| Faulty power steering box components - Repair power steering box |
| Steering pump failure - Repair or replace steering pump |
| Steering linkage or tie-rod ends are worn - Replace damaged component |
| Tractor is pulling to right or left |
| Tires are not properly inflated - Inflate tires as required |
| Incorrect toe-in adjustment - Adjust toe-in wheels properly |
| Steering tie-rod ends or linkage are defective - Replace failed component |
| Damaged power steering box parts - Repair power steering box |
| Damaged or worn steering valve assembly - Check and replace as required |
| Front hub bearings are defective or improperly adjusted - Change or adjust the bearings properly |
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| Farm Tractors Technical Specifications |
