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Kubota L225 Troubleshooting
The
Kubota L225 is a 2-wheel drive or 4-wheel drive compact utility tractor. This
model was manufactured from 1974 to 1976. The Kubota L225 tractor is equipped
with a 68.3 cubic inches (1.1 L) Kubota D1100A vertical four stroke
three-cylinder naturally aspirated diesel engine.
The engine has a cylinder bore of 3.02" (76 mm), piston stroke of 3.25"
(82 mm), and rated power of 22.5 hp (16.7 kW). The transmission includes
a dry clutch and sliding mesh gearbox with 8 forward and 2 reverse
gears. Max. forward speed - 13.1 mph (21 km/h), max. reverse speed - 9
mph (14.5 km/h).
The open center hydraulic system used a gear pump with fluid flow rate
of 3.7 gal/min (14.1 l/min). The main relief pressure is 117 bar (1700
psi). The Kubota L225 was equipped with a manual steering system,
differential mechanical expanding shoe brakes, 4.00x15 front tires, and
9.5x24 rear tires. The wheel base is 60.3" (1530 mm). The tractor is
compatible with Kubota L1200 front end loader.
| Engine Troubleshooting |
| Engine will not start or hard to start |
| Fuel filter is dirty - Install new filter element |
| Fuel supply valve is closed - Open fuel supply valve |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Clogged or damaged injectors - Check fuel injectors and replace if required |
| Fuel injection pump is not operating properly - Rebuild or install a new injection pump |
| Engine has bad compression - Check cylinder block and change faulty parts |
| Engine stops running while driving |
| Low coolant temperature - Warm up the engine |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Bad fuel injection - Check and adjust |
| Dirty fuel filter element - Clean or replace the filter |
| Clogged or damaged injectors - Check fuel injectors and replace if required |
| Diesel starts but then shuts off |
| Incorrect setting of fuel injection pump timing - Check the fuel injection pump timing setting |
| Plugged fuel filter - Clean or replace the filter |
| Clogged or defective injector nozzles - Inspect injector nozzles and change if required |
| Fuel injection pump is not working correctly - Change or repair the pump |
| Clogged air cleaner element - Install new cleaner element or replace it |
| Engine stops while idling |
| Low idle speed set incorrectly - Adjustment required |
| Fuel injection pump is not working correctly - Rebuild or install a new injection pump |
| Fuel injector nozzles are dirty - Test injector nozzles and replace as required |
| The valve clearance is incorrect - Adjust valve clearance according to specifications |
| Insufficient coolant fluid - Refill to the correct level. Check for coolant leaks |
| Cooling system components are damaged or system is dirty - Flush cooling system or change faulty components |
| Insufficient engine oil - Fill the crankcase with engine oil |
| Worn fan belt or incorrect belt tension - Adjust as required or replace belt |
| Thermostat is defective - Check and replace if required |
| Fuel injectors are clogged or faulty - Test fuel injectors and change if necessary |
| Insufficient fuel injection pressure - Check the fuel injection pressure and adjust if necessary |
| Air filter clogging - Replace or clean the air filter element |
| Engine oil filter is plugged - Replace or service engine oil filter |
| Engine is under excessive load - Shift to lower gear or reduce the load |
| Excessive valve clearance - Need to adjust valve clearance |
| Low idle speed setting is not correct - Correct the settings |
| Fuel hoses or pipes clogging - Clean fuel system hoses and pipes |
| Engine compression is insufficient: Valves are defective or worn - Install new valves |
| Abnormal engine knocking or noise |
| Unadjusted fuel injection pump timing - Check the fuel injection pump timing setting |
| Fuel injector nozzles are defective or dirty - Change injector nozzles |
| Engine oil level is low - Check oil level and add oil as required |
| Engine is not preheated - Warm up to required temperature |
| Main bearings or crankshaft are worn out - Need to install new components |
| Piston rings failure - Have piston rings replaced |
| Flywheel screws are loose - Tighten the screws firmly |
| Diesel engine using too much oil |
| Oil leaks: Worn gaskets or seals - Replace defective parts |
| Oil viscosity is wrong - Fill up with the correct oil viscosity |
| Worn or broken piston rings - Install new piston rings |
| Worn valve stems and valve guides - Valves need to be changed |
| Pistons or cylinder liners are damaged - Check liners and pistons, replace as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Battery faulty cell - Battery change required |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Battery terminals and cables are corroded or loose - Terminals and cables need to be tightened or cleaned |
| Belt slipping or wrong belt tension adjustment - Adjust belt tension as required or change belt |
| Battery capacity is low - Battery needs to be recharged |
| Battery will not hold charge - Battery needs service or replacement |
| Bad battery wiring harness - Inspect wiring for malfunctions, replace or repair |
| Battery terminals and cables are corroded or loose - Terminals and cables need to be tightened or cleaned |
| Battery capacity is low - Charge the battery |
| Discharged or worn battery - Battery needs to be recharged or replaced |
| Starter motor is faulty - Starter needs to be changed |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Worn or incorrectly adjusted clutch - Clutch adjustment or replacement required |
| Damaged or loose gear shift linkage - Replace or repair the shift linkage |
| Shift forks are damaged or worn - Change the shift forks |
| Defective gearshift mechanism - Replace defective components |
| Insufficient transmission fluid pressure |
| Low transmission oil level - Fill up the transmission oil |
| Clogged transmission fluid filter element (if fitted) - Change or service the transmission fluid filter |
| Faulty relief valve - Install a new valve |
| Transmission makes excessive noise |
| Bearings are worn or damaged - Faulty bearings should be changed |
| Oil level is insufficient - Fill the transmission housing to proper oil level |
| Dirty transmission oil - Transmission oil must be changed |
| Incorrect backlash or gears are defective - Change damaged gears or adjust backlash properly |
| Bent or worn shift forks - Change defective shift forks |
| Gaskets or seals are broken - Install new components |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Improper hydraulic pressure adjustments - Adjust it correctly |
| Misadjusted or defective main relief valve - Adjust or change relief valve |
| Contaminated hydraulic oil - Change hydraulic oil |
| Air enters in hydraulic system - Check the pump seals, suction line, and fittings |
| Hydraulic oil pressure too low |
| Lack of hydraulic oil - Add oil to the hydraulic system |
| Hydraulic oil filter element clogging - Install a new hydraulic filter element |
| Hydraulic pump failure - Test pump flow rate and replace pump if required |
| Hydraulic spool valve block is defective or set improper - Adjust properly or replace |
| Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Leakage in hydraulic lines - Find leaks in the system and fix it |
| Hitch cannot be lifted or lifting is too slow |
| Lack of hydraulic oil - Check oil level and add hydraulic oil as required |
| Cold hydraulic fluid - Warm up the fluid |
| Hydraulic fluid filter is clogged - Service or replace the hydraulic filter |
| Damaged hydraulic oil pump - Test the pump performance and change pump if required |
| Unadjusted or defective main relief valve - Set up or change the relief valve |
| Hydraulic spool valve block is defective or set improper - Adjust properly or replace |
| Hydraulic cylinder failure - Check cylinder components for damage or wear and change if necessary |
| Broken or disconnected suction line - Connect or replace |
| Three-point hitch dropping is too slow or cannot be dropped |
| Defective or not adjusted hydraulic control valve - Replace or adjust correctly |
| Hydraulic cylinder is defective - Check cylinder parts for wear or damage and replace if necessary |
| Lift arm shaft is worn - Change the shaft |
| The hitch has internal mechanical malfunctions - Change defective or worn hitch components |
| Three-point hitch raises or lowers not smoothly |
| Air leaks in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Contaminated hydraulic fluid - Change hydraulic fluid |
| Hydraulic pump malfunction - Check the pump performance and replace it if required |
| Hydraulic spool valve block is faulty or out of adjustment - Replace or adjust properly |
| Hydraulic cylinder is faulty - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Hard Steering |
| Steering knuckle or steering column is stuck - Inspect steering column and knuckle, replace worn parts |
| Steering gearbox components are worn - Replace defective components of steering gearbox |
| Faulty drag link or tie rod - Replace or repair |
| Insufficient lubrication in steering box - Need to lubricate the gearbox |
| Not adjusted toe-in alignment - Check and adjust toe-in |
| Tires are not correctly inflated - Inflate tires as necessary |
| Excessive steering wheel free play |
| Steering column bearing or shaft is worn - Change faulty parts |
| Steering linkage assembly is worn or loose - Repair or replace steering linkage |
| Worn steering gearbox bearings - Replace the bearings |
| Front wheel hub bearings or steering knuckles are worn - Change hub bearings or knuckles |
| Damaged or worn steering tie-rod ends - Change faulty part |
| Tractor pulls to right or left |
| Worn or loose steering linkage assembly - Repair or replace steering linkage |
| Defective steering knuckle bushing - Replace knuckle bushing |
| Uneven tire pressure - Inflate the tires properly |
| Toe-in adjustment is incorrect - Adjust toe-in correctly |
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| Farm Tractors Technical Specifications |
