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Kubota L345 Troubleshooting
The
Kubota L345 is a two-wheel drive (L345F) or four-wheel drive (L345DT) compact
utility tractor. This model was manufactured between 1978 and 1985. The
components of Kubota L345 driveline system: a 90.7 cu.in (1.5 L) Kubota V1501-A
vertical 4-cycle four cylinder water-cooled diesel engine and sliding gear
transmission with 8 forward and 2 reverse gears.
The engine has a cylinder bore of 3.01" (76 mm), piston stroke of 3.23"
(82 mm), and rated power of 34 hp (25.5 kW). Max. forward speed - 13.7
mph (22 km/h), maximum reverse speed - 6.7 mph (10.8 km/h).
The open center hydraulic system used a gear pump with rated fluid flow
of 6.4 gal/min (24.2 l/min). The hydraulic pressure is 155 bar (2250
psi). The Kubota L345 was equipped with a manual or power assist
steering, wet disc brakes, 6.00x16 front tires, and 13.6x28 rear tires.
The wheelbase is 76.6 in (1940 mm). The tractor is compatible with
Kubota L1720 loader with lift capacity to maximum height of 1495 lbs
(680 kg).
| Engine Troubleshooting |
| Engine won't start or difficult to start |
| Fuel filter clogging - Clean the filter or install new filter element |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Air in fuel system - Air-bleed fuel system |
| Fuel injectors are clogged or faulty - Change fuel injectors |
| Fuel injection pump is broken - Repair or install a new fuel pump |
| Poor engine compression - Check and change damaged parts |
| Diesel stalls while running |
| Engine is not fully warmed up - Warm up engine as required |
| Air in fuel pipes - Bleed fuel pipes |
| Improper fuel injection - Fuel injection settings required |
| Clogged fuel filter element - Replace filter element |
| Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary |
| Diesel engine stops after starting |
| Incorrectly set fuel injection pump timing - Fuel injection pump timing adjustment needs to be corrected |
| Fuel filter is dirty - Filter maintenance required |
| Fuel injector nozzles are dirty or defective - Test injector nozzles and replace as required |
| Fuel injection pump is not operating properly - Replace injection pump or repair it |
| Dirty air cleaner - Air cleaner maintenance required |
| Engine stops while idling |
| Improperly adjusted low idle speed - Need to adjust idle speed |
| Faulty fuel injection pump - Rebuild or change fuel pump |
| Fuel injector nozzles are faulty - Service or replace nozzles if required |
| Valve clearance is not correct - Adjust valve clearance according to specifications |
| Lack of coolant in cooling system - Fill cooling system to proper level. Any leaks must be repaired |
| Cooling system is dirty or cooling components are damaged - Change faulty components or flush the cooling system |
| Not enough engine oil - Checking oil level and add if necessary |
| Unadjusted fan belt tension or worn belt - Adjust correctly or install new belt |
| Defective or wrong type of thermostat - Check and change if necessary |
| Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary |
| Incorrect fuel injection pressure - Adjust to proper pressure |
| Clogged air filter - Change or service air filter element |
| Oil filter element clogging - Clean or replace engine oil filter element |
| Engine overloaded - Reduce load or shift to lower gear |
| Incorrect valve clearance - Check and adjust |
| Improperly adjusted low idle speed - Need to adjust idle speed |
| Fuel hoses or pipes are dirty - Clean fuel system hoses and pipes |
| Engine losing compression: Valves are faulty or leaking - Change the valves |
| Abnormal engine noise or knocking |
| Timing of fuel injection pump is not adjusted - Adjust injection timing |
| Clogged or defective injector nozzles - Change or clean injector nozzles |
| Low engine oil level - Fill up the engine oil |
| Engine is cold - Warm up the engine as required |
| Worn main bearings or crankshaft - Worn parts replacement required |
| Piston rings are worn or broken - Piston rings need to be replaced |
| Loose flywheel bolts - Inspect flywheel bolts and tighten properly |
| Engine consuming too much oil |
| Oil leaks: Seals or gaskets are defective - To repair leaks, replace worn parts |
| Crankcase oil too light - Use proper viscosity oil |
| Worn or stuck piston rings - Change the piston rings as required |
| Valve guides and stems are worn - Replace defective valves |
| Cylinder liners or pistons are scuffed - Check pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Battery is defective - Change the battery |
| Damaged battery wiring harness - Inspect wiring for damage, replace or repair |
| Battery terminals and cables are loose or corroded - Clean or tighten cables and terminals |
| Improper belt tension adjustment or damaged belt - Adjust belt tension correctly or replace belt |
| Low battery voltage - Battery needs to be recharged |
| Battery will not hold charge - Battery needs to be serviced or replaced |
| Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
| Battery terminals and cables are loose or corroded - Cables and terminals must be tightened or cleaned |
| Battery voltage is low - Battery is drained, recharge it |
| Drained or defective battery - Replace or charge as required |
| Damaged starter motor - Starter needs to be replaced |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Hard shifting |
| Worn or misadjusted clutch - Clutch adjustment or replacement required |
| Damaged or loose gear shift linkage - Change defective shift linkage |
| Shift forks are worn or damaged - Change defective shift forks |
| Gear shifting mechanism is worn - Change worn components |
| Transmission fluid pressure is insufficient |
| Low transmission fluid level - Check and refill the transmission fluid |
| Clogged transmission fluid filter element (if fitted) - Change or clean the transmission fluid filter |
| Relief valve sticking - Install a new valve |
| Transmission is excessively noisy |
| Cracked or worn bearings - Faulty bearings should be replaced |
| Insufficient oil supply - Correct the transmission oil level |
| Contaminated transmission fluid - Transmission fluid must be changed |
| Damaged gears or improper backlash - Change worn gears or set backlash correctly |
| Shift forks are worn or damaged - Replace defective shift forks |
| Gaskets or seals are broken - Install new gaskets or seal |
| Transmission case is cracked - Replace case or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system is overheated |
| Improper hydraulic pressure adjustments - Adjust it correctly |
| Unadjusted or defective main relief valve - Adjust relief valve or change if required |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Air enters in hydraulic system - Check the suction line, pump seals, and fittings |
| Low hydraulic fluid pressure |
| Lack of hydraulic oil - Add oil to the hydraulic system |
| Hydraulic oil filter element clogging - Clean the hydraulic filter or install new filter element |
| Hydraulic pump is faulty - Test the pump flow rate and change pump if required |
| Hydraulic spool valve block is not set properly or defective - Adjust correctly or replace |
| Hydraulic cylinder malfunction - Check cylinder parts for wear or damage and replace if necessary |
| Hydraulic lines are leaking - Identify leaks in the system and repair it |
| Hitch fails to lift or lifts slowly |
| Hydraulic fluid level is insufficient - Fill the hydraulic system with oil |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic fluid filter element is dirty - Hydraulic filter maintenance required |
| Hydraulic pump is faulty - Check the pump capacity and replace 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 malfunction - Check cylinder components for wear or damage and change if necessary |
| Suction pipe is broken or loose - Tighten the pipe or replace it |
| Three-point hitch dropping is too slow or cannot be dropped |
| Hydraulic spool valve is defective or set improper - Replace or adjust properly |
| Hydraulic cylinder malfunction - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Hitch rock shaft is damaged - Change the shaft |
| Damaged mechanical components of the hitch - Change faulty or worn hitch components |
| Hitch lowering or lifting is not smoothly |
| Aeration in hydraulic system - Inspect the pump seals, suction line, and fittings |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Hydraulic pump is faulty - Test pump flow rate and replace pump if required |
| Hydraulic spool valve is defective or set improper - Change or adjust properly |
| Hydraulic cylinder is faulty - Inspect cylinder parts for wear or damage and replace if required |
| Steering System Troubleshooting |
| Steering wheel turns hard |
| Steering column is defective or incorrectly installed - Steering column must be installed correctly or replaced |
| Air trapped in the steering system - Bleed the steering system |
| Toe-in adjustment is incorrect - Adjust toe-in correctly |
| Improper tire pressure - Check the pressure and inflate tires as required |
| Defective hydraulic steering pump - Check the hydraulic steering pump and change if necessary |
| Power steering valve has wear or malfunction - Repair or replace the steering valve |
| Faulty steering box parts - Change defective steering box components |
| Insufficient steering fluid - Fill up the steering fluid |
| Steering system oil leak - Retighten steering hose and pipe connections |
| Excessive steering wheel play |
| Steering column shaft or coupling has maximum wear - Replace faulty component |
| Worn or damaged power steering valve - Repair or change the steering valve |
| Worn steering box components - Replace defective parts of power steering box |
| Defective hydraulic steering pump - Replace or repair steering pump |
| Worn or faulty steering linkage or tie-rod ends - Change damaged part |
| Tractor is pulling to right or left |
| Improper tire pressure - Check the pressure and inflate tires as required |
| Toe-in adjustment is incorrect - Adjust toe-in properly |
| Steering tie-rod ends or linkage are worn - Change damaged component |
| Damaged steering box parts - Defective power steering box components must be replaced |
| Worn or defective power steering valve - Repair or replace the steering valve |
| Front hub bearings are incorrectly adjusted or worn - Change or adjust bearings correctly |
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| Farm Tractors Technical Specifications |
