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Kubota L3301HST Troubleshooting
The
Kubota L3301HST is a Standard L01 series compact utility tractor. This model was
manufactured between 2014 and 2021. The components of Kubota L3301HST driveline
system: Kubota D1803-CR-E4 4-cycle vertical 3-cylinder direct injection
naturally aspirated water-cooled diesel engine with a rated power of 33 hp (24.6
kW), and three-range hydrostatic transmission with infinite forward and reverse
gears.
Max travel speed (forward and reverse): 14.1 mph (22.7 km/h) / 12.7 mph
(20.5 km/h). The open center hydraulic system includes a gear pump with
a rated capacity of 6.3 gallons per minute (23.9 liters per minute). The
main relief pressure is 162 bar (2350 psi). The Kubota L3301HST is
equipped with an integral type power steering, wet disc brakes, 7.2x16
(AG) or 27x8.50-15 (Industrial) front tires, and 11.2x24 (AG) or 15x19.5
(Industrial) rear tires.
The wheel base is 63.3" (1610 mm). The tractor is compatible with the
following attachments: a Kubota LA525 front-end loader with lift
capacity to full height of 1131 lbs (513 kg), and Kubota BH77 backhoe
with 2-ft flat digging depth of 89.8" (2280 mm).
| Engine Troubleshooting |
| Engine will not start or starts up hard |
| Fuel filter clogging - Install new filter element |
| No fuel injection - Open fuel cock to inject fuel |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Clogged or damaged injectors - Inspect fuel injectors and replace if necessary |
| Fuel injection pump malfunctioning - Rebuild or change fuel pump |
| Bad cylinder compression - Check cylinder block and replace defective parts |
| Engine shuts off unexpectedly while running |
| Coolant temperature is low - Engine is not warmed up to the required temperature |
| Air in fuel pipes - Bleed fuel pipes |
| Bad fuel injection - Check and adjust |
| Fuel filter is dirty - Filter maintenance required |
| Clogged fuel injectors - Test fuel injectors and change if necessary |
| Diesel starts but suddenly stops |
| Timing of fuel injection pump is not adjusted - Fuel injection pump timing adjustment needs to be corrected |
| Fuel filter plugging - Clean or change the filter |
| Fuel injector nozzles are dirty or defective - Service or replace nozzles if required |
| Damaged fuel injection pump - Rebuild or install a new injection pump |
| Air cleaner element is clogged - Clean or replace the air cleaner element |
| Wrong adjustment of low idle speed - Test and adjust |
| Fuel injection pump failure - Rebuild or install a new injection pump |
| Fuel injector nozzles are damaged or dirty - Service or replace injector nozzles |
| Incorrect valve clearance - Adjust valve clearance |
| Insufficient coolant fluid - Fill the cooling system. Repair any leaks if necessary |
| Cooling system parts are damaged or system is dirty - Change faulty components or service cooling system |
| Engine oil insufficient - Check and refill engine oil |
| Fan belt tension is unadjusted or belt is damaged - Adjust belt tension correctly or replace it |
| Thermostat is defective - Check thermostat, replace if necessary |
| Clogged fuel injectors - Check fuel injectors and replace if required |
| Incorrect fuel injection pressure - Adjust pressure to proper level |
| Air filter element clogging - Replace or service air filter element |
| Oil filter element clogged - Change or clean engine oil filter element |
| Diesel engine overloaded - Reduce engine load |
| Valve clearance is wrong - Check and adjust as required |
| Incorrect low idle setting - Correct the settings |
| Restricted fuel pipes or hoses - Service fuel hoses and pipes |
| Insufficient engine compression: Valves are faulty or leaking - Valve replacement required |
| Engine knocking sound or abnormal noise |
| Timing of fuel injection pump is not adjusted - Adjust the fuel injection pump timing correctly |
| Fuel injector nozzles are damaged - Inspect injector nozzles and change if required |
| Not enough engine oil - Checking oil level and add if necessary |
| Engine is not warmed up to the required temperature - Warm up engine as required |
| Main bearings or crankshaft wear - Need to install new components |
| Defective or broken piston rings - Piston rings need to be replaced |
| Loose flywheel screws - Check the flywheel screws and tighten as required |
| Excessive engine oil consumption |
| Oil leakage: Damaged seals or gaskets - Defective components must be replaced |
| Wrong oil viscosity - Use oil of proper viscosity |
| Piston rings are stuck or broken - Have piston rings replaced |
| Valve guides or stems are damaged - Replace defective valves |
| Scored cylinder liners or pistons - Inspect liners and pistons, change as necessary |
| Electrical System Troubleshooting |
| Battery is not charging |
| Defective battery - Use a new battery |
| Battery electrical wire harness damage - Check battery wires for damage, replace or change |
| Corroded or loose cables and terminals - Service or tighten battery terminals and cables |
| Belt is defective or belt tension is improperly adjusted Install new belt or adjust belt tension as required |
| Battery capacity is low - Charge the battery |
| Battery is not holding charge - Service battery or replace it |
| Battery cable harness damage - Check battery cables for damage, change or repair |
| Corroded or loose terminals and cables - Tighten or service terminals and cables |
| Low battery capacity - Battery is drained, charge it |
| Discharged or faulty battery - Charge or replace the battery |
| Starter motor is damaged - Repair or change starter |
| Battery cables are disconnected or incorrectly connected - Check cables and reconnect it correctly |
| Hydrostatic Transmission Troubleshooting |
| Hydrostatic transmission is making noise |
| Transmission oil level is too low or oil is dirty - Fill the transmission with fresh oil or add oil to the correct level |
| Speed control rod linkage is worn or not adjusted - Adjust or repair rod linkage |
| Relief valve failure - Change the valve |
| Transmission overload - The load should be reduced |
| Worn or damaged parts of the hydrostatic transmission - Change or repair damaged parts |
| Transmission oil over heats |
| Low transmission oil level - Add transmission oil as required |
| Plugged transmission fluid filter - Change or clean the transmission fluid filter |
| Cooling components are clogged or damaged - Check all cooling components and clean or replace if required |
| Excessive loading - Reduce loading |
| Insufficient oil supply - Checking transmission oil level and add if necessary |
| Charge pressure is too low - Check charge pressure |
| Relief valve is worn or damaged - Install a new valve |
| Broken gaskets or seals - Seals and gaskets need to be replaced |
| High pressure inside the transmission case - Replace or repair defective components |
| Oil return tube is clogged - Inspect tube and service if required |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| System pressure has not been adjusted correctly - Pressure needs to be adjust correctly |
| Main relief valve failure or incorrect setting - Adjust or replace the relief valve |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Air trapped in the hydraulic system - Check the pump seals, suction line, and fittings |
| Insufficient hydraulic oil pressure |
| Hydraulic oil level is insufficient - Add oil to the hydraulic system |
| Hydraulic oil filter clogging - Clean the hydraulic filter element or replace if necessary |
| Defective hydraulic pump - Test the pump flow rate and change pump if required |
| Defective or incorrect setting hydraulic control valve block - Set correctly or replace |
| Hydraulic cylinder is defective - Check cylinder components for wear or damage and change if necessary |
| Hydraulic lines are leaking - Detect leaks in the system and fix it |
| Hitch won't lift or lifts slowly |
| Hydraulic fluid level is insufficient - Need to add fluid |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic oil filter element is dirty - Replace hydraulic filter element or service if necessary |
| Hydraulic pump malfunction - Check pump flow and install new pump if necessary |
| Main relief valve failure or incorrect setting - Replace or set up the relief valve |
| Hydraulic spool valve block is defective or set improper - Change or adjust correctly |
| Broken hydraulic cylinder - Check cylinder components for damage or wear and change if necessary |
| Disconnected or damaged suction pipe - Connect or replace |
| Hitch won't lower or lowers slowly |
| Hydraulic spool valve block is not set properly or defective - Change or adjust correctly |
| Hydraulic cylinder is not working - Check cylinder components for damage or wear and change if necessary |
| Hitch rock shaft is damaged - Install a new shaft |
| Defective mechanical parts of the hitch - Replace defective or worn hitch components |
| Jerky lifting or lowering of 3-point hitch |
| Hydraulic system sucks air - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic oil contamination - Change the oil |
| Hydraulic pump malfunction - Test the pump flow rate and change pump if required |
| Hydraulic spool valve is faulty or out of adjustment - Change or set correctly |
| Hydraulic cylinder malfunction - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Steering is stiff |
| Defective or improperly assembled steering column - Reassemble properly or change steering column |
| Aeration in steering system - Air-bleed steering system |
| Toe-in adjustment is incorrect - Adjust toe-in properly |
| Tires are not correctly inflated - Inflate tires as necessary |
| Steering pump is worn - Install a new hydraulic steering pump |
| Faulty or worn steering valve - Change or repair steering valve if required |
| Damaged steering box parts - Repair power steering box |
| Steering fluid insufficient - Check and refill steering fluid |
| Oil leakage in the steering system - Retighten joints of the hydraulic steering pipes and hoses |
| Excessive steering wheel play |
| Steering column coupling or shaft has maximum wear - Replace faulty part |
| Damaged or worn steering valve - Repair or replace the steering valve |
| Damaged power steering box components - Change defective steering box parts |
| Steering pump malfunction - Steering pump needs to be repaired or replaced |
| Worn or faulty steering tie-rod ends or linkage - Change failed component |
| Tractor is pulling to left or right |
| Tire pressure is low - Tires need to be inflated |
| Improper toe-in - Check toe-in and correct |
| Faulty or worn steering linkage or tie-rod ends - Change damaged part |
| Worn steering box components - Defective parts of power steering box must be replaced |
| Damaged or worn steering valve - Inspect and replace as required |
| Incorrectly adjusted or worn front hub bearings - Change or adjust bearings correctly |
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| Farm Tractors Technical Specifications |
