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Kubota L275 Troubleshooting

Kubota L275 is 2WD or 4WD compact utility tractor. This model was manufactured between 1981 and 1985. The tractor is powered by Kubota D1302 4-cycle vertical 3-cylinder water cooled diesel engine with a maximum output power of 27.5 Hp (20.5 kW) at 2750 rev/min.

The Kubota L275 is fitted with a 8x7 gear transmission (4 gears in 2 ranges with forward and reverse shuttle). The maximum forward speed - 12.4 mph (19.8 km/h), max. reverse speed - 8.4 mph (13.4 km/h).

The open center hydraulic system includes a gear pump with a rated fluid flow of 6.2 gpm (23.5 lmp). The hydraulic pressure is 2250 psi. The front tire size: 6.50-14, rear tire size: 18.0x30. The wheel base is 66.5 inches for 2WD models and 64.6 inches for 4WD models.

Engine Troubleshooting
Engine won't start or difficult 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 lines - Bleed fuel lines
Clogged fuel injectors - Change fuel injectors
Fuel injection pump is defective - Change or repair the pump
Poor cylinder compression - Check cylinder block and change worn components
Engine stops unexpectedly while running
Engine is not fully warmed up - Warm up to required temperature
Air trapped in fuel system - Bleed air
Irregular fuel injection - Adjust fuel injection timing
Dirty fuel filter element - Service the filter
Dirty or faulty injectors - Check fuel injectors and replace if required
Engine starts and then stalls
Fuel injection pump out of timing - Check the fuel injection pump timing setting
Clogged fuel filter element - Filter maintenance required
Fuel injector nozzles are dirty - Change injector nozzles
Fuel injection pump is defective - Repair or change injection pump
Clogged air cleaner - Change or service air cleaner element
Engine stops at idle
Too low idle RPM - Correct low idle settings
Faulty fuel injection pump - Install a new fuel pump or repair
Fuel injector nozzles are defective or dirty - Check and change nozzles as required
Valve clearance is not correct - Adjust valve clearance according to specifications
Engine overheats
Low engine coolant - Fill the radiator to the required level. Check and repair damage to the cooling system if required
Cooling system is clogged or cooling parts are defective - Flush cooling system or replace faulty parts
Lack of engine oil - Add oil to the engine crankcase
Fan belt tension is incorrect or belt is defective - Adjust as required or change belt
Thermostat is defective - Check and replace if required
Low engine power
Dirty or faulty injectors - Check fuel injectors and replace if required
Incorrect fuel injection pressure - Test fuel injection pressure and adjust it correctly
Air filter is dirty - Service or change air filter
Clogged oil filter - Service or change engine oil filter element
Engine is under excessive load - Reduce load or shift to lower gear
The valve clearance is not adjusted - Adjust valve clearance
Too low idle RPM - Normalize low idle speed
Clogged fuel hoses or pipes - Service fuel hoses and pipes
Engine low compression: Valves are defective or worn - Replace the valves as required
Abnormal engine knocking or noise
Fuel injection pump out of timing - Correct injection timing
Fuel injector nozzles are clogged or faulty - Inspect injector nozzles and change if required
Low engine oil level - Check and refill engine oil
Engine is cold - Warm up the engine to required temperature
Main bearings or crankshaft wear - Change defective components as required
Stuck or worn piston rings - Piston rings replacement required
Loose flywheel bolts - Check flywheel bolts and tighten properly
Engine using too much oil
External oil leaks: Damaged seals or gaskets - Defective components must be replaced
Incorrect oil viscosity - Fill up with the correct oil viscosity
Piston rings are seized or worn - Change the piston rings as required
Damaged valve stems or valve guides - Valves replacement required
Worn pistons or cylinder liners - Inspect liners and pistons, change as necessary

Electrical System Troubleshooting
Battery is not charging
Battery is worn - Install a new battery
Damaged battery wiring harness - Inspect wiring for damage, replace or repair
Corroded or loose battery cables and terminals - Clean or tighten terminals and cables
Belt damage or incorrect belt tension adjustment - Replace belt or correctly adjust belt tension
Starter cranks slowly
Battery power is low - Battery is drained, charge it
Battery won’t hold charge - Service charging system or change battery
Damaged battery cable harness - Check electrical cables for damage, repair or replace
Battery cables and terminals are corroded or loose - Tighten or clean cables and terminals
Starter doesn't crank
Low battery output - Battery needs to be recharged
Drained or worn battery - Change or recharge battery
Faulty starter motor - Repair or install a new starter
Wiring harness is disconnected or improperly connected - Check wiring harness and reconnect properly

Transmission Troubleshooting
Gears are hard to shift
Worn or misadjusted clutch - Adjust or change the clutch
Stuck or damaged gear shift linkage - Repair or change shift linkage
Worn or damaged shift forks - Change the shift forks
Worn gear shift mechanism - Replace worn components
Low transmission pressure
Not enough oil in transmission - Check transmission oil level and add oil as required
Transmission oil filter is plugged (if fitted) - Replace or clean transmission oil filter
Relief valve failure - Change the valve
Transmission makes noise
Bearings are worn or broken - Change the bearings
Not enough oil in transmission - Fill up the transmission oil
Dirty transmission oil - Fill up with fresh transmission oil
Backlash is incorrect or gears are worn - Set backlash correctly or change the gears
Damaged or worn shift forks - Change the shift forks
Transmission oil leaking
Worn gaskets or seals - Gaskets or seal need to be replaced
Transmission case is cracked - Replace case or transmission assembly

Hydraulics Troubleshooting
Hydraulic system is too hot
Improper pressure in hydraulic system - Adjust properly
Main relief valve is damaged or adjusted improperly - Set up or change the relief valve
Contaminated hydraulic fluid - Change hydraulic fluid
Air in hydraulic system - Inspect the suction pipe, fittings, and pump seals
Low hydraulic system pressure
Not enough hydraulic oil in the system - Fill up the hydraulic oil
Hydraulic oil filter element is dirty - Clean or change hydraulic filter
Hydraulic pump is defective - Test pump flow rate and replace pump if required
Hydraulic control valve block is not set properly or defective - Adjust properly or change
Hydraulic cylinder is faulty - Inspect cylinder components for wear or damage and change if required
Leakage in hydraulic lines - Detect leaks in hydraulic system and repair it
3-point hitch raises slowly or won't raise
Hydraulic oil level is low - Fill up the hydraulic oil
Cold hydraulic fluid - Warm up the fluid
Hydraulic fluid filter is dirty - Install a new hydraulic filter element
Hydraulic pump is defective - Test the pump performance and change pump if required
Unadjusted or defective main relief valve - Replace or set up the relief valve
Hydraulic spool valve is defective or set improper - Adjust properly or replace
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required
Broken or disconnected suction line - Connect or replace
Hitch not dropping or hitch drops slowly
Damaged or incorrect adjusted hydraulic control valve - Replace or adjust properly
Hydraulic cylinder is broken - Inspect cylinder parts for wear or damage and replace if required
Damaged hitch cross shaft - Replace the shaft
Mechanical parts of the hitch are damaged - Replace worn or defective hitch components
Hitch lower or lift is jerky
Aeration in hydraulic system - Inspect the suction pipe, fittings, and pump seals
Dirty hydraulic oil - The oil must be changed
Hydraulic pump failure - Test the pump flow rate and change pump if required
Defective or not adjusted hydraulic spool valve - Adjust properly or replace
Faulty hydraulic cylinder - Check cylinder parts for wear or damage and replace 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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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