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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
Engine overheated
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
Diesel power loss
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
High oil consumption
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
Starter will not crank
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
Transmission noises
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



Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
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