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Kubota L3300 Troubleshooting

The Kubota L3300 is a Grand L series compact utility tractor. This model was manufactured from 1994 to 1999. The Kubota L3300 tractor is powered by Kubota D1703-A 4-cycle vertical 3-cylinder indirect injection water-cooled diesel engine. A 100.5 cu.in (1.65L) engine has a cylinder bore of 3.40" (87 mm), piston stroke of 3.60" (92.4 mm), and rated power of 35.1 hp (26.2 kW).

The Kubota L3300 is fitted with two transmission options: FST Sync Shuttle fully synchronized transmission with 8 forward and 8 reverse gears, or Glide Shift creeper transmission with 16 forward and 16 reverse gears. The maximum forward speed - 16.3 mph (26.2 kph), maximum reverse speed - 15 mph (24.1 kph). The open center hydraulic system used a gear pump with a flow rate of 7 gpm (26.5 lpm). The hydraulic pressure is 175 bar (2490 psi). The 2-wheel drive models are equipped with 5.00x15 front tyres and 12.4x24 rear tyres. The 7.20x16 front tyres and 12.4x24 rear tyres fit 4-wheel drive tractors.

The wheelbase is 65.9" (1675 mm) for models with 2WD and 65.7" (1670 mm) for models with 4WD. The Kubota L3300 is compatible with the following attachments: a 72" mid-mount 3-blade mower deck with cutting height of 1.5-4.0" (38-102 mm), 60" front-mount snowblower with hydraulic lift system, 72" front-mount blade, Kubota LA480 front-end loader with lift capacity to full height of 1058 lbs (480 kg), and Kubota BL4690 backhoe with maximum digging depth of 90.2" (2290 mm).

Engine Troubleshooting
Engine doesn't start or starts hard
Clogged fuel filter element - Clean the filter or install new filter element
Closed fuel cock - Open fuel on-off cock to inject fuel
Air in fuel lines - Bleed fuel lines
Dirty or faulty injectors - Inspect fuel injectors and replace if necessary
Faulty fuel injection pump - Rebuild or replace pump
Low compression - Check cylinder block and replace defective parts
Engine stops during operation
Low coolant temperature - Warm up the engine
Air in fuel lines - Bleed fuel lines
Uneven fuel injections - Repair or adjustment
Fuel filter is clogged - Replace the filter element
Faulty or dirty injectors - Change fuel injectors
Diesel starts but suddenly stops
Fuel injection pump timing is incorrect - Fuel injection pump timing adjustment needs to be corrected
Clogged fuel filter element - Change filter element
Fuel injector nozzles are faulty - Check and change nozzles as required
Damaged fuel injection pump - Change or repair the pump
Air cleaner element is clogged - Service or replace the air cleaner
Engine stops while idling
Incorrect low idle speed adjustment - Correct low idle settings
Fuel injection pump damage - Install a new fuel pump or repair
Fuel injector nozzles are faulty - Service or replace injector nozzles
Valve out of adjustment - Adjustment procedure required
Engine overheats
Lack of coolant in cooling system - Top up coolant fluid. Repair any leaks if necessary
Cooling system is dirty or cooling components are damaged - Flush cooling system or replace faulty parts
Not enough engine oil - Fill up the oil to required level
Fan belt is broken or belt tension is unadjusted - Adjust belt tension correctly or replace it
Thermostat is defective - Check and change if necessary
Diesel power loss
Clogged fuel injectors - Clean or replace fuel injectors
Improper fuel injection pressure - Adjust to proper pressure
Air filter element is clogged - Air filter maintenance required
Clogged oil filter - Change or clean engine oil filter element
Engine is under excessive load - Change to lower gear or reduce load
Improper valve clearance - Check and adjust as required
Improperly adjusted low idle speed - Need to adjust idle speed
Dirt in the hoses or pipes - Fuel hoses and pipes must be clean
Engine losing compression: Leaking or faulty valves - Valve replacement required
Engine knocking or noise
Incorrectly set fuel injection pump timing - Adjust injection timing
Fuel injector nozzles are damaged or dirty - Test injector nozzles and replace as required
Insufficient engine oil - Check and refill engine oil
Engine is not fully warmed up - Warm up the engine as required
Crankshaft or main bearings failure - Worn parts replacement required
Piston rings are worn or broken - Replace piston rings
The flywheel to crankshaft bolts are loose - Tighten bolts as required
Diesel engine consuming too much oil
Oil leakage: Gaskets or seals can be faulty - Replace defective parts
Wrong oil viscosity - Use oil of proper viscosity
Worn or stuck piston rings - Piston rings need to be replaced
Worn valve guides and valve stems - Change the valves
Pistons or cylinder liners are scuffed - Inspect liners and pistons, change as necessary

Electrical System Troubleshooting
Battery is not charging
Battery bad cell - Change the battery
Battery electrical wire harness damage - Check battery wires for damage, replace or change
Loose or corroded cables and terminals - Service or tighten battery terminals and cables
Belt damage or incorrect belt tension adjustment - Adjust belt tension as required or change belt
Starter cranks slowly
Low battery capacity - Battery needs to be recharged
Battery discharges quickly - Service battery or replace it
Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair
Corroded or loose battery terminals and cables - Tighten or service terminals and cables
Starter will not crank
Battery power is low - Battery is drained, recharge it
Drained or faulty battery - Need to charge or replace the battery
Starter motor is defective - Repair or change starter
Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly

Transmission Troubleshooting
Gears are hard to shift
Clutch is not adjusted or faulty - Clutch needs to be replaced or adjusted
Gear shift linkage is stuck or damaged - Replace or repair the shift linkage
Damaged or worn shift forks - Install new shift forks
Gearshift mechanism failure - Change or repair failed components
Insufficient transmission oil pressure
Low transmission fluid level - Fill the transmission housing with fluid
Transmission oil filter clogging (if fitted) - Replace or service transmission oil filter
Relief valve is faulty - Change relief valve
Transmission makes excessive noise
Bearings are worn or damaged - Bearings replacement required
Lack of transmission fluid supply - Fill the transmission housing with fluid
Contaminated transmission oil - Transmission oil must be changed
Defective gears or incorrect backlash - Replace gears or set backlash correctly
Worn or damaged shift forks - Replace defective shift forks
Transmission fluid leaking
Broken gaskets or seals - Install new seal or gaskets
Cracked transmission housing - Housing needs to be replaced

Hydraulics Troubleshooting
Hydraulic system overheats
Hydraulic system pressure is not corrected - The pressure must be adjusted correctly
Main relief valve is defective or unadjusted - Set up or change the relief valve
Hydraulic fluid is dirty - Hydraulic fluid change required
Hydraulic system sucks air - Inspect the suction line, pump seals, and fittings
Hydraulic oil pressure too low
Hydraulic fluid level is low - Add fluid to the hydraulic system
Dirty hydraulic oil filter - Hydraulic filter maintenance required
Hydraulic pump is defective - Flow-rate pump and change pump if necessary
Hydraulic spool valve block is faulty or out of adjustment - Change or set correctly
Hydraulic cylinder is defective - Check the hydraulic cylinder parts for damage or wear and replace if necessary
Leakage in hydraulic lines - Detect leaks in hydraulic system and repair it
3-point hitch won't raise or raises slowly
Lack of hydraulic oil - Fill the hydraulic system with oil
Hydraulic oil is too cold - Allow oil to warm
Hydraulic fluid filter clogging - Replace hydraulic filter element or service if necessary
Hydraulic pump is defective - Check the pump capacity and replace pump if required
Main relief valve is defective or unadjusted - Set up or change the relief valve
Defective or incorrect setting hydraulic control valve block - Replace or adjust properly
Hydraulic cylinder failure - Inspect cylinder components for wear or damage and change if required
Suction pipe is damaged or loose - Repair or change
Hitch does not lower or lowers very slowly
Faulty or incorrect setting hydraulic control valve - Replace or adjust properly
Broken hydraulic cylinder - Inspect cylinder components for wear or damage and change if required
Hitch rock shaft is damaged - Change the shaft
The hitch has mechanical faults - Change worn or defective hitch parts
3-point hitch lift or lower is jerky
Air trapped in the hydraulic system - Check the pump seals, suction pipe, and fittings
Hydraulic fluid contamination - Change hydraulic fluid
Hydraulic pump is defective - Flow-rate hydraulic pump and replace pump if necessary
Hydraulic spool valve is faulty or out of adjustment - Adjust properly or replace
Hydraulic cylinder is faulty - Check the hydraulic cylinder parts for damage or wear and replace if necessary

Steering System Troubleshooting
Stiff steering
Steering column is damaged or improperly mounted - Replace the steering column or mount it properly
Air leaks in steering system - Bleed air
Not adjusted toe-in - Check toe-in and correct
Tires are not properly inflated - Inflate tires as required
Steering pump failure - Install a new hydraulic steering pump
Defective or worn hydrostatic steering unit - Change or repair steering unit if required
Relief valve failure or seizing - Service or replace the relief valve
Steering oil insufficient - Check and refill steering oil
Oil leaks in the steering system - Tighten the steering hose and pipe joints
Excessive free play of steering wheel
Steering column shaft or coupling has maximum wear - Replace faulty part
Hydrostatic steering unit is defective or worn - Repair or change the steering unit
Damaged hydraulic steering pump - Install a new hydraulic steering pump
Steering tie-rod ends or linkage are defective - Change failed component
Tractor pulls to left or right
Tire pressure is low - Tires need to be inflated
Incorrect toe-in - Check and adjust toe-in
Worn or faulty steering tie-rod ends or linkage - Replace failed part
Faulty or worn hydrostatic steering unit - Inspect and change as required
Faulty steering cylinder - Replace or repair steering cylinder
Front hub bearings are incorrectly adjusted or worn - Adjust correctly or install new 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