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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
Engine is overheated
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
Poor engine power
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
Starter turning slow
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
Starter motor won't turn
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
Transmission fluid leaks
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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JD 1026R JD 3650 JD 6400 JD 7810
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MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294