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Kubota L2250 Troubleshooting
The
Kubota L2250 is a 2WD or 4WD compact utility tractor. This model was
manufactured from 1985 to 1990. The Kubota L2250 driveline includes a Kubota
D1302-DI-A 4-cycle vertical 3-cylinder naturally aspirated diesel engine and
mechanical shuttle transmission with 8 forward and 7 reverse gears.
A 79.3 cu.in (1.3 L) engine has a cylinder bore of 3.23" (82 mm), piston
stroke of 3.23" (82 mm), and rated power of 26.5 hp (19.8 kW). Max.
forward speed - 12.9 mph (20.8 km/h), max. reverse speed - 8.2 mph (13.5
km/h). The open center hydraulic system used a gear pump with fluid flow
rate of 6.7 gal/min (25.4 l/min).
The hydraulic fluid capacity is 8.2 gal (31 L). The 2WD models (L2250F)
are equipped with 4.00x15 front tires and 9.5x24 rear tires. The 6.00x14
front tires and 9.5x24 rear tires are used for 4WD tractors (L2250DT).
The wheel base is 64.6" (1640 mm). The Kubota L2250 is compatible with
the following attachments: 60" and 72" mid-mount 3-blade mower decks,
Kubota BF400G front end loader with lift capacity to max height of 882
lbs (400 kg), and Kubota BL4530 backhoe with maximum digging depth of
90" (2280 mm).
| Engine Troubleshooting |
| Engine doesn't start or difficult to start |
| Fuel filter is dirty - Install new filter element |
| No fuel injection - Open fuel cock to inject fuel |
| There is air in the fuel system - Bleed the system |
| Fuel injectors are damaged or dirty - Change fuel injectors |
| Fuel injection pump malfunctioning - Repair or change injection pump |
| Engine has bad compression - Check and replace worn parts |
| Diesel stalls while running |
| Engine is cold - Warm up the engine as required |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Bad fuel injection - Check and adjust |
| Clogged fuel filter element - Clean or change the filter |
| Fuel injectors are damaged or dirty - Inspect fuel injectors and replace if necessary |
| Engine starts and immediately stops |
| Fuel injection pump timing is incorrect - Adjust the fuel injection pump timing correctly |
| Fuel filter is clogged - Clean or change the filter |
| Fuel injector nozzles are damaged - Change or clean injector nozzles |
| Damaged fuel injection pump - Repair or change injection pump |
| Clogged air cleaner element - Install new cleaner element or replace it |
| Incorrectly adjusted low idle speed - Adjust the low idle speed |
| Fuel injection pump is damaged - Rebuild or change fuel pump |
| Fuel injector nozzles are damaged - Inspect injector nozzles and change if required |
| Valve out of adjustment - Adjustment procedure required |
| Not enough coolant - Top up coolant. Repair any leaks if necessary |
| Cooling system parts are damaged or system is dirty - Replace faulty parts or service cooling system |
| Engine oil level is insufficient - Fill the crankcase with engine oil |
| Damaged fan belt or unadjusted belt tension - Change or adjust belt tension correctly |
| Thermostat failure - Install new thermostat |
| Dirty or faulty injectors - Check fuel injectors and replace if required |
| Fuel injection pressure is incorrect - Test fuel injection pressure and adjust it correctly |
| Air filter clogging - Service or change air filter |
| Oil filter element is dirty - Replace or clean engine oil filter element |
| Engine overloaded - Load reducing required |
| Excessive valve clearance - Check and adjust |
| Low idle speed adjustment is incorrect - Adjustment required |
| Dirt in the fuel pipes or hoses - Service fuel hoses and pipes |
| Engine compression too low: Leaking or broken valves - Replace the valves as required |
| Engine knocking sound or abnormal noise |
| Timing of fuel injection pump is wrong - Check and correct adjustments |
| Faulty fuel injector nozzles - Test injector nozzles and replace as required |
| Low engine oil level - Fill up the engine oil |
| Coolant temperature is low - Normalize the temperature by warming up the engine |
| Worn crankshaft or main bearings - Worn parts replacement required |
| Broken or defective piston rings - Replace piston rings |
| Loose flywheel screws - Inspect the flywheel screws and tighten securely |
| Diesel engine using too much oil |
| Oil leaking: Seals or gaskets are defective - Replace defective parts |
| Wrong oil viscosity - Use proper viscosity oil |
| Stuck or defective piston rings - Install new piston rings |
| Worn valve stems and valve guides - Change the valves |
| Pistons or cylinder liners are scuffed - Check pistons and liners, install new parts as required |
| Electrical System Troubleshooting |
| Battery won’t charge |
| Battery is worn - Replace the battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Corroded or loose terminals and cables - Tighten or service cables and terminals |
| Belt is worn or belt tension is incorrectly adjusted - Adjust belt tension properly or replace belt |
| Battery capacity is low - Low battery charging, charge as required |
| Battery is draining quickly - Battery needs to be serviced or replaced |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Corroded or loose battery terminals and cables - Tighten or clean terminals and cables |
| Low battery power - Battery is drained, recharge it |
| Drained or worn battery - Need to charge or replace the battery |
| Starter motor is damaged - Repair or replace starter |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Gear hard to shift |
| Worn or incorrectly adjusted clutch - Adjust or install new clutch |
| Damaged or loose gear shift linkage - Service or replace shift linkage |
| Damaged or worn shift forks - Shift forks need to be replaced |
| Gear shifting mechanism is worn - Change worn components |
| Transmission fluid pressure is insufficient |
| Low transmission oil level - Fill up the transmission oil |
| Transmission oil filter clogging (if fitted) - Change or clean the transmission oil filter |
| Relief valve is faulty - Replace the valve |
| Bearings are worn or damaged - Replace the bearings |
| Insufficient oil supply - Correct the transmission oil level |
| Transmission oil contamination - Change transmission oil |
| Improper backlash or damaged gears - Change damaged gears or adjust backlash properly |
| Worn or damaged shift forks - Replace defective shift forks |
| Gaskets or seals are broken - Install new components |
| Cracked transmission housing - Housing needs to be replaced |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| The system pressure has not been corrected - Make the correct settings |
| Main relief valve is faulty or misadjusted - Adjust relief valve or change if required |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Air in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Insufficient hydraulic fluid pressure |
| Not enough hydraulic oil in the system - Add oil to the hydraulic system |
| Hydraulic fluid filter clogging - Replace hydraulic filter element or service if necessary |
| Faulty hydraulic oil pump - Test the pump flow rate and change pump if required |
| Hydraulic spool valve is not set properly or defective - Change or adjust correctly |
| Defective hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Hydraulic pipes are leaking - Detect leaks in the system and fix it |
| Three-point hitch lifting is too slow or cannot be lifted |
| Hydraulic fluid level is insufficient - Fill the hydraulic system with oil |
| Cold hydraulic fluid - Warm up the fluid |
| Hydraulic fluid filter element is dirty - Clean or replace the hydraulic filter |
| Faulty hydraulic oil pump - Check hydraulic pump flow and replace pump if necessary |
| Main relief valve incorrect adjustment or failure - Adjust the valve or replace if necessary |
| Defective or not adjusted hydraulic spool valve - Adjust correctly or replace |
| Broken hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
| Broken or loose suction line - Retighten or change |
| 3-point hitch won't drop or drops slowly |
| Damaged or incorrect adjusted hydraulic control valve - Adjust correctly or change |
| Hydraulic cylinder failure - Check cylinder parts for wear or damage and replace if necessary |
| Hitch rock shaft is damaged - Install a new shaft |
| The hitch has internal mechanical malfunctions - Replace faulty or worn hitch components |
| Hitch lower or lift is jerky |
| Aeration in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic oil contamination - Change the oil |
| Hydraulic pump not working - Check hydraulic pump flow and replace pump if necessary |
| Hydraulic spool valve block is not set properly or defective - Adjust properly or change |
| Hydraulic cylinder malfunction - Inspect cylinder components for damage or wear and change if required |
| Steering System Troubleshooting |
| Steering wheel is difficult to turn |
| Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly |
| Air trapped in the steering system - Bleed the steering system |
| Not adjusted toe-in - Adjust toe-in correctly |
| Tire pressure is improper - Inflate the tires properly |
| Worn steering pump - Steering pump needs to be repaired or replaced |
| Damaged or worn steering valve assembly - Repair or change the steering valve |
| Worn power steering box components - Defective parts of power steering box must be replaced |
| Steering oil insufficient - Check and refill steering oil |
| Steering system oil leakage - Tighten the steering hose and line joints |
| Steering wheel has too much free-play |
| Steering column coupling or shaft has maximum wear - Replace faulty component |
| Steering valve assembly is damaged or worn - Repair or replace the steering valve |
| Worn power steering box parts - Change defective power steering box components |
| Steering pump malfunction - Steering pump needs to be repaired or replaced |
| Faulty or worn steering tie-rod ends or linkage - Change failed part |
| Front wheels wander to left or right |
| Tires are deflated - Need to inflate tires |
| Improper toe-in adjustment - Adjust toe-in correctly |
| Worn or faulty steering linkage or tie-rod ends - Change damaged part |
| Worn power steering box components - Defective power steering box components must be replaced |
| Steering valve assembly has wear or damage - Inspect and replace as required |
| Front hub bearings are worn or incorrectly adjusted - Adjust properly or replace bearings |
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| Farm Tractors Technical Specifications |
