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Kubota L3350 Troubleshooting
The
Kubota L3350 compact utility tractor was manufactured between 1985 and 1990.
This model was designed in two versions: L3350F (2WD) and L3350DT (4WD). The
Kubota L3350 tractor is equipped with a 113.6 cu.in (1.9L) Kubota V1902-DI
4-cycle vertical four-cylinder naturally aspirated water-cooled diesel engine
with rated power of 40 hp (29.8 kW).
The mechanical shuttle transmission includes a dry plate clutch and
partially synchronized gearbox with 8 forward and 8 reverse gears. The
maximum forward speed - 13.5 mph (21.7 kph), max. reverse speed - 13.4
mph (21.6 kph).
The open center hydraulic system used a gear pump with fluid flow rate
of 9.3 gpm (35.2 lpm). The main relief pressure is 172.5 bar (2500 psi).
The 2WD models are equipped with 8.00x16 front tires and 13.6x24 rear
tires. The 9.50x16 front tires and 14.9x24 rear tires are used for 4WD
tractors. The wheel base is 72.6" (1840 mm). The Kubota L3350 is
compatible with the following attachments: Kubota BF800 loader with lift
capacity to full height of 1764 lbs (800 kg), and Kubota L4540 backhoe
with digging depth of 125" (3170 mm).
| Engine Troubleshooting |
| Engine doesn't start or difficult to start |
| Plugged fuel filter - Change the filter element |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Fuel injectors are clogged or faulty - Service or change fuel injectors |
| Fuel injection pump malfunction - Change pump or rebuild it |
| Poor engine compression - Check and change damaged parts |
| Engine stops unexpectedly while running |
| Engine has not warmed up to recommended temperature - Warm up the engine |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Bad fuel injection - Check and adjust |
| Fuel filter is clogged - Service or replace the filter |
| Dirty or damaged injectors - Clean or replace fuel injectors |
| Engine starts and then stalls |
| Incorrectly set fuel injection pump timing - Repair or replace fuel injection pump |
| Fuel filter plugging - Service the filter |
| Fuel injector nozzles are dirty or defective - Service or replace nozzles if required |
| Faulty fuel injection pump - Repair or install new pump |
| Clogged air cleaner element - Replace or clean the air cleaner element |
| Engine stalls when idling |
| Incorrectly set low idle speed - Adjust the low idle speed |
| Fuel injection pump is faulty - Install a new pump or rebuild |
| Fuel injector nozzles are dirty or defective - Test injector nozzles and replace as required |
| The valve clearance is not adjusted - Adjust valve clearance |
| Insufficient coolant fluid - Fill radiator to proper level. Repair any leaks if necessary |
| Cooling system components are failed or system is dirty - Service the cooling system or replace faulty components |
| Engine oil level low - Fill the crankcase with engine oil |
| Fan belt tension is improper or belt is defective - Adjust properly or change the belt |
| Thermostat is defective - Check and change if necessary |
| Fuel injectors are damaged or dirty - Clean or replace fuel injectors |
| Fuel injection pressure is incorrect - Check the fuel injection pressure and adjust if necessary |
| Clogged air filter element - Clean or replace the air filter element |
| Oil filter is clogged - Clean or change engine oil filter |
| Engine is overloaded - Reduce load on the engine |
| Valve clearance is not correct - Adjust valve clearance |
| Too low idle RPM - Adjust as required |
| Dirty fuel pipes or hoses - Clean fuel hoses and pipes |
| Engine lost compression: Valves are broken or leaking - Valves need to be replaced |
| Engine knocking sound or abnormal noise |
| Incorrectly set fuel injection pump timing - Fuel pump timing settings need to be corrected |
| Fuel injector nozzles fault - Inspect injector nozzles and change if required |
| Engine oil level is low - Need to add engine oil |
| Coolant temperature is low - Normalize the temperature by warming up the engine |
| Worn crankshaft or main bearings - Need to install new components |
| Piston rings failure - Replace the piston rings as required |
| Loose flywheel bolts - Check flywheel bolts and tighten properly |
| Oil leaking: Seals or gaskets are wearing excessively - Worn parts need to be replaced |
| Oil viscosity is wrong - Use proper viscosity oil |
| Stuck or defective piston rings - Change piston rings |
| Worn valve guides and valve stems - Replace defective valves |
| Damaged pistons or cylinder liners - Check pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery will not charge |
| Battery dead cell - Battery change required |
| Damaged battery wiring harness - Inspect wiring for damage, replace or repair |
| Corroded or loose cables and terminals - Tighten or clean terminals and cables |
| Belt slipping or wrong belt tension adjustment - Change belt or adjust belt tension properly |
| Starter motor cranks slow |
| Low battery output voltage - Charge the battery |
| Battery does not hold charge - Service charging system or replace battery |
| Battery electrical wire harness damage - Check battery wires for damage, replace or change |
| Corroded or loose cables and terminals - Service or tighten battery cables and terminals |
| Low battery output - Low battery charging, charge as required |
| Drained or worn battery - Battery needs to be recharged or replaced |
| Faulty starter motor - Starter should be replaced |
| Battery cables are disconnected or incorrectly connected - Check cables and reconnect it correctly |
| Transmission Troubleshooting |
| Hard shifting |
| Worn or misadjusted clutch - Clutch replacement or adjustment required |
| Gear shift linkage is stuck or worn - Replace or repair the shift linkage |
| Bent or worn shift forks - Replace the shift forks |
| Gearshift mechanism is worn out - Repair or replace worn components if required |
| Low transmission pressure |
| Oil level is low - Add transmission oil as required |
| Transmission oil filter element is dirty (if fitted) - Change or clean the transmission oil filter |
| Relief valve is defective - Replace relief valve as required |
| Damaged or worn bearings - Faulty bearings should be changed |
| Fluid level is low - Fill system with correct transmission fluid level |
| Dirty transmission oil - Change transmission oil |
| Incorrect backlash or gears are defective - Replace gears or set backlash correctly |
| Worn or damaged shift forks - Shift forks need to be changed |
| Transmission fluid leaking |
| Worn gaskets or seals - Change defective seal or gaskets |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Improper hydraulic system pressure setting - Set the pressure properly |
| Defective or misadjusted main relief valve - Replace or set up the relief valve |
| Contaminated hydraulic fluid - Change hydraulic fluid |
| Air enters in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Hydraulic oil pressure is low |
| Hydraulic fluid level is low - Check and refill the hydraulic fluid |
| Hydraulic oil filter is dirty - Install a new hydraulic filter element |
| Hydraulic pump malfunction - Check pump flow and change pump if necessary |
| Hydraulic control valve block is defective or set improper - Change or adjust correctly |
| Defective hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Leakage in hydraulic pipes - Detect leaks in hydraulic system and repair it |
| Hitch cannot be lifted or lifting is too slow |
| Not enough hydraulic fluid in the system - Add fluid to the hydraulic system |
| Cold oil in hydraulic system - Wait for oil to warm up |
| Hydraulic oil filter clogging - Change the hydraulic filter element or service if required |
| Hydraulic pump not working - Check pump flow and change pump if necessary |
| Main relief valve incorrect adjustment or failure - Adjust relief valve or change if required |
| Hydraulic control valve block is defective or set improper - Adjust properly or change |
| Hydraulic cylinder is not working - Check cylinder parts for wear or damage and replace if necessary |
| Suction line is damaged or disconnected - Connect or replace |
| 3-point hitch lowers slowly or won't lower |
| Hydraulic control valve is not set properly or defective - Adjust correctly or change |
| Hydraulic cylinder is faulty - Check cylinder components for damage or wear and change if necessary |
| Damaged lift arm shaft - Install a new shaft |
| The hitch has internal mechanical malfunctions - Change damaged or worn hitch components |
| Hitch jerks when drop or lift |
| Aeration in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Hydraulic pump not working - Flow-rate pump and change pump if necessary |
| Damaged or incorrect adjusted hydraulic control valve - Set correctly or replace |
| Faulty hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
| Steering System Troubleshooting |
| Steering is stiff |
| Damaged or improperly installed steering column - Reinstall or replace the steering column |
| Air enters in steering system - Bleed air |
| Incorrect toe-in - Adjust toe-in correctly |
| Tires are incorrectly inflated - Inflate as required |
| Defective hydraulic steering pump - Install a new steering pump |
| Power steering valve assembly has wear or malfunction - Inspect and replace as required |
| Worn steering box parts - Replace defective parts of power steering box |
| Not enough steering oil - Check oil level and add steering oil as required |
| Steering system oil leakage - Retighten steering hose and line connections |
| Steering wheel free play is excessive |
| Steering column coupling or shaft has maximum wear - Change faulty component |
| Defective or worn power steering valve assembly - Check and replace as required |
| Faulty steering box parts - Repair power steering box |
| Defective hydraulic steering pump - Check the steering pump and replace if necessary |
| Steering linkage or tie-rod ends are worn - Change failed component |
| Front wheels wander to left or right |
| Front tires are worn out - Install new tires |
| Not adjusted toe-in - Check and adjust toe-in |
| Worn or faulty steering linkage or tie-rod ends - Replace failed part |
| Damaged steering box parts - Replace defective parts of power steering box |
| Defective or worn power steering valve assembly - Change or repair steering valve if required |
| Worn or incorrectly adjusted or worn front hub bearings - Adjust properly or change bearings |
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| Farm Tractors Technical Specifications |
