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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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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| Farm Tractors Technical Specifications |
