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Kubota L3010 Troubleshooting
The
Kubota L3010 compact utility tractor was manufactured between 1998 and 2002.
This model was designed in 4 versions: L3010F (2WD Gear Transmission), L3010DT
(4WD Gear Transmission), L3010GST (4WD Glide Shift Transmission), and L3010HST
(4WD Hydrostatic Transmission).
The Kubota L3010 is powered by 91.5 cu.in (1.5L) Kubota D1503-L-A
4-cycle vertical 3-cylinder indirect injection water-cooled diesel
engine with a rated power of 30.4 hp (22.6 kW). The Kubota L3010 is
fitted with 3 types of transmission. Type 1: 8x8 synchronized shuttle
transmission. Type 2: 8x8 glide shift transmission. Type 3: three-range
hydrostatic transmission with infinite forward and reverse gears. Max
forward speed - 16.4 mph (26.5 km/h), max reverse speed - 14.1 mph (22.7
km/h). The open center hydraulic system includes a gear pump with fluid
flow rate of 7 gpm (24.5 lpm). The hydraulic pressure is 172 bar (2500
psi).
The 2-wheel drive models are equipped with 5.00x15 front tires and
12.4x24 rear tires. The 7.2x16 front tires and 12.4x24 rear tires are
used for tractors with 4-wheel drive. The wheel base is 65.9" (1675 mm)
for models with 2WD (4x2) and 65.7" (1670 mm) for models with 4WD (4x4).
The Kubota L3010 is compatible with a 72" mid-mount 3-blade mower deck
with cutting height of 1.5-3.5" (38-90 mm), 72" front-mount snowblower
with hydraulic lift system, 60" front-mount blade,
Kubota LA481
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 hard to start |
| Fuel filter plugging - Replace filter element |
| No fuel supply from the tank - Open the fuel supply valve |
| Air in fuel system - Air-bleed fuel system |
| Fuel injectors are defective or dirty - Check fuel injectors and replace if required |
| Fuel injection pump failure - Replacement or repair required |
| Poor cylinder compression - Inspect cylinder block and replace worn components |
| Diesel shuts off during operation |
| Engine has not warmed up to required temperature - Warm up the engine to required temperature |
| Air in fuel system - Air-bleed fuel system |
| Bad fuel injection - Check and adjust |
| Clogged fuel filter element - Replace filter element |
| Fuel injectors are defective or dirty - Inspect fuel injectors and replace if necessary |
| Diesel starts and then stalls |
| Timing of fuel injection pump is not adjusted - Repair or replace fuel injection pump |
| Dirty fuel filter element - Clean or replace the filter |
| Fuel injector nozzles are damaged or dirty - Check and change nozzles as required |
| Fuel injection pump is broken - Rebuild or install a new injection pump |
| Dirty air cleaner element - Replace cleaner or install new cleaner element |
| Engine stalls when idling |
| Too low idle RPM - Adjust as required |
| Fuel injection pump malfunction - Change or repair the pump |
| Fuel injector nozzles are dirty or defective - Service or replace injector nozzles |
| Excessive valve clearance - Need to adjust valve clearance |
| Lack of engine coolant - The cooling system needs to be refilled. Check radiator and hoses for leaks |
| Cooling system components are failed or system is dirty - Service the cooling system or replace faulty components |
| Lack of engine oil - Fill up the oil to required level |
| Fan belt is defective or belt tension is not adjusted - Adjust as required or replace belt |
| Thermostat is defective - Check and change if necessary |
| Clogged fuel injectors - Check fuel injectors and replace if required |
| Improper fuel injection pressure - Correct the pressure settings |
| Air filter element is dirty - Change or service air filter element |
| Engine oil filter is plugged - Change or service engine oil filter |
| Engine overload - Load reducing required |
| Valve clearance is wrong - Adjust valve clearance according to specifications |
| Low idle speed adjustment is incorrect - Correct low idle adjustment |
| Fuel pipes or hoses clogging - Service fuel hoses and pipes |
| Engine lost compression: Leaking or broken valves - Valves need to be replaced |
| Fuel injection pump out of timing - Fuel pump timing settings need to be corrected |
| Clogged or damaged injector nozzles - Change injector nozzles |
| Lack of engine oil - Need to add engine oil |
| Engine is cold - Warm up the engine as required |
| Crankshaft or main bearings wear - Worn parts replacement required |
| Worn or broken piston rings - Piston rings replacement required |
| The flywheel to crankshaft bolts are loose - Tighten bolts as required |
| Engine oil consumption is too high |
| Oil leakage: Seals or gaskets are defective - Worn parts need to be replaced |
| Wrong oil viscosity - Fill up with the correct oil viscosity |
| Piston rings are stuck or broken - Have piston rings replaced |
| Valve stems and guides are worn - Valves need to be changed |
| Pistons or cylinder liners are scuffed - Check liners and pistons, change as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Battery dead cell - Battery replacement required |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Corroded or loose battery cables and terminals - Clean or tighten cables and terminals |
| Belt is damaged or belt tension is incorrectly adjusted - Change belt or properly adjust belt tension |
| Low battery voltage - Recharge the battery |
| Battery runs out quickly - Service or replace the battery |
| Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
| Corroded or loose battery cables and terminals - Tighten or clean cables and terminals |
| Battery voltage is low - Low battery charging, charge as required |
| Drained or defective battery - Recharge or change battery |
| Damaged starter motor - Starter should be changed |
| Cables harness is improperly connected or disconnected - Inspect cables harness and reconnect it properly |
| Transmission Troubleshooting |
| Difficulty shifting gears |
| Misadjusted or defective clutch - Replace or adjust clutch |
| Damaged or loose gear shift linkage - Replace or repair the shift linkage |
| Worn or damaged shift forks - Shift forks need to be replaced |
| Defective gearshift mechanism - Replace defective components |
| Low transmission oil pressure |
| Lack of transmission fluid supply - Fill up the transmission fluid |
| Clogged transmission fluid filter element (if fitted) - Change or service the transmission fluid filter |
| Relief valve is faulty - Replace valve as required |
| Transmission is making noise |
| Broken or worn bearings - Faulty bearings should be changed |
| Low transmission fluid level - Fill up the transmission fluid |
| Transmission fluid contamination - Fill up with fresh transmission fluid |
| Damaged gears or improper backlash - Set backlash correctly or change the gears |
| Damaged or worn shift forks - Replace the shift forks |
| Gaskets or seals are defective Change defective seal or gaskets |
| Cracked transmission case - Install a new transmission case |
| Hydrostatic Transmission Troubleshooting |
| HST transmission makes excessive noise |
| Oil level is insufficient or oil is contaminated - Top up to proper level or change oil |
| Damaged or not adjusted speed control rod linkage - Replace rod linkage or adjust correctly |
| Relief valve is faulty - Replace relief valve as required |
| Excessive transmission load - The load should be reduced |
| Worn or damaged parts of the hydrostatic transmission - Inspect hydrostatic transmission parts for malfunctions and change if required |
| Insufficient oil supply - Correct the transmission oil level |
| Clogged transmission fluid filter element - Replace or clean transmission fluid filter |
| Cooling components are damaged or clogged - Inspect all cooling components and service or replace if necessary |
| Excessive loading - Reduce loading |
| Insufficient oil supply - Add transmission oil as required |
| Charge pressure is insufficient - Check charge pressure |
| Defective or worn relief valve - Replace relief valve |
| Gaskets or seals are damaged - Seals and gaskets replacement required |
| Transmission housing internal pressure is excessive - Repair or replace worn parts |
| Plugged transmission fluid drain pipe - Service or change drain pipe |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Hydraulic system pressure is not adjusted correctly - Correct adjustment is required |
| Defective or misadjusted main relief valve - Replace or set up the relief valve |
| Contaminated hydraulic oil - Change hydraulic oil |
| Air trapped in the hydraulic system - Inspect the pump seals, suction line, and fittings |
| Insufficient hydraulic fluid pressure |
| Not enough hydraulic oil in the system - Fill up the hydraulic oil |
| Hydraulic fluid filter clogging - Hydraulic filter maintenance required |
| Hydraulic pump malfunction - Check pump performance and change it if necessary |
| Hydraulic control valve is faulty or out of adjustment - Replace or set properly |
| Faulty hydraulic cylinder - Check cylinder components for damage or wear and change if necessary |
| Leakage in hydraulic lines - Inspect hydraulic system for leaks and repair it |
| 3-point hitch lifts too slowly or can't lift |
| Lack of hydraulic oil - Add oil to the hydraulic system |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Hydraulic oil filter clogging - Clean or replace the hydraulic filter |
| Damaged hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary |
| Main relief valve is faulty or misadjusted - Adjust the valve or replace if necessary |
| Hydraulic spool valve block is not set properly or defective - Adjust correctly or change |
| Hydraulic cylinder is defective - Inspect cylinder components for damage or wear and change if required |
| Loose or damaged suction line - Tighten or replace |
| 3-point hitch fails to drop or drops slowly |
| Hydraulic control valve block is faulty or out of adjustment - Adjust correctly or change |
| Hydraulic cylinder malfunction - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Damaged hitch rock shaft - Install a new shaft |
| The hitch has mechanical faults - Change worn or damaged hitch components |
| Hitch jerks when lower or lift |
| Air enters in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Hydraulic pump not working - Test the pump flow rate and change pump if required |
| Hydraulic control valve block is defective or set improper - Set properly or replace |
| Hydraulic cylinder is defective - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Steering System Troubleshooting |
| Steering is stiff |
| Steering column is worn or improperly fitted - Refit properly or change the steering column |
| Air enters in steering system - Bleed the steering system |
| Not adjusted toe-in - Adjust toe-in properly |
| Deflated front tyres - Inflate tyres as needed |
| Worn steering pump - Replace or repair steering pump |
| Defective or worn hydrostatic steering unit - Inspect and change as required |
| Relief valve is stuck or defective - Inspect relief valve and replace if necessary |
| Low steering oil level - Fill up the steering oil |
| Steering system has oil leaks - Retighten the connections of the hydraulic steering lines and hoses |
| Steering wheel free play is excessive |
| Steering column coupling or shaft has maximum wear - Change faulty component |
| Worn or damaged hydrostatic steering unit - Replace or repair steering unit as required |
| Steering pump not working - Repair or replace steering pump |
| Worn or faulty steering tie-rod ends or linkage - Change damaged part |
| Front wheels wander to left or right |
| Tire pressure is low - Tires need to be inflated |
| Toe-in adjustment is incorrect - Check and adjust toe-in |
| Steering tie-rod ends or linkage are worn - Replace damaged component |
| Hydrostatic steering unit is worn or defective - Change or repair steering unit if required |
| Steering cylinder is defective - Change or repair hydraulic steering cylinder |
| Incorrectly adjusted or damaged front hub bearings - Adjust properly or change bearings |
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| Farm Tractors Technical Specifications |
