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Kubota L2600 Troubleshooting
The
Kubota L2600 is a Standard L-series compact utility tractor. This model was
manufactured from 2000 to 2003. The tractor was designed in 2 versions: L2600F
(2WD) and L2600DT (4WD). The Kubota L2600 is equipped with a 85 cu.in (1.4 L)
Kubota D1403 vertical 3-cylinder water-cooled diesel engine with a rated power
of 26 hp (19.3 kW) at 2800 rpm.
The transmission includes a dry clutch and sliding mesh gearbox with 8
forward and 2 reverse gears. The maximum travel speed (forward and
reverse): 14.3 mph (22 km/h) / 9.6 mph (15.5 km/h). The open center
hydraulic system used a gear pump with a flow of 4.6 gpm (17.4 lpm) for
L2600F model or 7.2 gpm (27.3 lpm) for L2600DT model. The hydraulic
pressure is 155 (2250 psi).
The Kubota L2600 tractor was equipped with 5.00-15 (2WD) or 7.00-16
(4WD) front tires and 11.2-24 rear tires. The wheelbase is 61.2" (1550
mm) for 2-wheel drive models and 61.6" (1560 mm) for 4-wheel drive
models. Compatible attachments for the tractor: Kubota LB400 loader with
lift capacity to full height of 882 lbs (400 kg), Kubota BL4690 backhoe
with maximum digging depth of 90" (2280 mm) and bucket digging force of
2950 lbs (1338 kg).
Engine Troubleshooting |
Engine doesn't start or hard to start |
Clogged fuel filter element - Clean or replace the filter |
Fuel is not supplied from the tank to the system - Check the fuel shut-off valve |
Air trapped in fuel system - Bleed air |
Faulty or dirty injectors - Check fuel injectors and replace if required |
Fuel injection pump failure - Repair or change injection pump |
Bad engine compression - Check and replace worn parts |
Engine stops running unexpectedly |
Engine is not preheated - Warm up the engine to required temperature |
Fuel-line is leaking air - Retighten clamps, replace defective pipes |
Bad fuel injection - Check and adjust |
Dirty fuel filter element - Clean the filter or install new filter element |
Dirty or damaged injectors - Check fuel injectors and replace if required |
Engine starts but immediately stops |
Fuel injection pump out of timing - Adjust injection timing |
Fuel filter plugging - Clean or change the filter |
Fuel injector nozzles are dirty - Install a new set of well-balanced nozzles |
Fuel injection pump failure - Repair or replace injection pump |
Clogged air cleaner element - Service or change air cleaner |
Too low idle RPM - Normalize low idle speed |
Fuel injection pump is not operating properly - Replace injection pump or repair it |
Fuel injector nozzles are defective or dirty - Change injector nozzles |
Excessive valve clearance - Have it adjusted |
Engine coolant is insufficient - Top up coolant fluid. Check system for leaks |
Cooling system components are worn or system is clogged - Change faulty components or flush the cooling system |
Lack of engine oil - Need to add engine oil |
Worn fan belt or incorrect belt tension - Adjust belt tension properly or change it |
Thermostat fault - Check thermostat, replace if necessary |
Diesel engine loses power |
Fuel injectors are defective or dirty - Check fuel injectors and replace if required |
Fuel injection pressure is wrong - Adjust to proper pressure |
Dirty air filter - Replace filter or install new filter element |
Clogged oil filter element - Clean or change engine oil filter |
Engine is running overloaded - Reduce load on the engine |
The valve clearance is incorrect - Need to adjust valve clearance |
Incorrectly adjusted low idle speed - Test and adjust |
Fuel hoses or pipes are dirty - Service fuel pipes and hoses |
Engine lost compression: Intake or exhaust valves are damaged - Replace the valves |
Abnormal engine noise or knocking |
Fuel injection pump timing is incorrect - Adjust injection timing |
Fuel injector nozzles are dirty - Install a new set of well-balanced nozzles |
Engine oil level low - 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 - Install new parts |
Piston rings failure - Install new piston rings |
Loose flywheel screws - Check the flywheel screws and tighten as required |
Engine consuming too much oil |
Oil leaks: Worn seals or gaskets - New components need to be installed |
Wrong oil viscosity - Use oil of correct viscosity |
Piston rings are seized or worn - Change piston rings |
Damaged valve guides or valve stems - Replace defective valves |
Scored pistons or cylinder liners - Inspect liners and pistons, replace as necessary |
Electrical System Troubleshooting |
Battery won’t charge |
Dead cell in battery - Use a new battery |
Battery electrical wire harness damage - Check battery wires for damage, replace or change |
Battery cables and terminals are corroded or loose - Tighten or service terminals and cables |
Damaged belt or incorrectly adjusted belt tension - Adjust belt tension correctly or change belt |
Battery power is low - Recharge the battery |
Battery is not holding charge - Service or replace the battery |
Bad battery wiring harness - Inspect wiring for malfunctions, replace or repair |
Battery cables and terminals are corroded or loose - Tighten or clean cables and terminals |
Low battery output - Battery is drained, charge it |
Discharged or worn battery - Replace or charge as required |
Starter motor is damaged - Replace or repair starter |
Wiring harness is disconnected or improperly connected - Check wiring harness and reconnect properly |
Transmission Troubleshooting |
Hard to shift gears |
Clutch is not adjusted or faulty - Adjust clutch or replace if required |
Loose or broken gear shift linkage - Change or repair shift linkage |
Bent or worn shift forks - Change defective shift forks |
Worn gear shift mechanism - Replace worn components |
Low transmission fluid pressure |
Oil level is low - Fill up the transmission oil |
Transmission fluid filter element is dirty (if fitted) - Change or clean the transmission fluid filter |
Faulty relief valve - Install a new valve |
Bearings are worn or broken - Bearings need to be changed |
Low transmission oil level - Check transmission oil level and add oil as required |
Transmission fluid contamination - Transmission fluid must be changed |
Defective gears or incorrect backlash - Set backlash properly or change the gears |
Shift forks are damaged or worn - Replace defective shift forks |
Gaskets or seals are defective Change defective gaskets or seal |
Cracked transmission housing - Housing needs to be replaced |
Hydraulics Troubleshooting |
Excessive hydraulic system heat |
Hydraulic system pressure is not corrected - The pressure must be adjusted correctly |
Main relief valve is faulty or misadjusted - Adjust the valve or replace if necessary |
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
Air in hydraulic system - Inspect the pump seals, suction line, and fittings |
Hydraulic oil pressure is insufficient |
Lack of hydraulic fluid - Fill the hydraulic system with oil |
Hydraulic oil filter element is dirty - Install a new hydraulic filter element |
Faulty hydraulic oil pump - Test the pump flow rate and change pump if required |
Hydraulic control valve is not set properly or defective - Replace or adjust properly |
Defective hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
Leakage in hydraulic pipes - Find leaks in hydraulic system and repair it |
3-point hitch lifts slowly or won't lift |
Lack of hydraulic oil - Add oil to the hydraulic system |
Cold hydraulic oil - Warm up the oil |
Hydraulic fluid filter clogging - Hydraulic filter maintenance required |
Defective hydraulic pump - Check pump flow and install new pump if necessary |
Main relief valve malfunction or incorrect adjustment - Adjust or replace the relief valve |
Hydraulic control valve is not set properly or defective - Adjust properly or change |
Hydraulic cylinder is defective - Check cylinder components for wear or damage and change if necessary |
Disconnected or damaged suction pipe - Connect or replace |
Hitch won't lower or lowers slowly |
Hydraulic spool valve block is faulty or out of adjustment - Replace or set correctly |
Hydraulic cylinder malfunction - Check cylinder components for wear or damage and change if necessary |
Lift arm shaft is worn - Change the shaft |
Damaged mechanical components of the hitch - Change damaged or worn hitch parts |
Jerky lowering or lifting of the hitch |
Air in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
Dirty hydraulic oil - The oil must be changed |
Hydraulic pump is defective - Test the pump flow rate and change pump if required |
Hydraulic control valve is faulty or out of adjustment - Adjust correctly or change |
Hydraulic cylinder is not working - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
Steering System Troubleshooting |
Steering wheel is difficult to turn |
Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly |
Air leaks in steering system - Need to bleed air |
Incorrect toe-in - Check and adjust toe-in |
Tires are improperly inflated - Inflate as necessary |
Steering pump failure - Steering pump needs to be replaced or repaired |
Power steering valve assembly is damaged or worn - Inspect and replace as required |
Worn steering box parts - Defective power steering box components must be replaced |
Steering oil level low - Add oil to steering system |
Steering system oil leakage - Retighten steering pipe and hose connections |
Excessive free play of steering wheel |
Worn steering column shaft or coupling - Change defective component |
Power steering valve assembly is worn or defective - Change or repair steering valve if required |
Worn steering box components - Defective power steering box components must be replaced |
Damaged hydraulic steering pump - Install a new steering pump |
Worn or faulty steering tie-rod ends or linkage - Change failed component |
Front wheels wander to right or left |
Improper tire pressure - Check the pressure and inflate tires as required |
Incorrect toe-in - Adjust toe-in properly |
Steering linkage or tie-rod ends are worn - Replace damaged component |
Faulty steering box components - Repair power steering box |
Power steering valve assembly is defective or worn - Change or repair steering valve if required |
Front hub bearings are damaged or incorrectly adjusted - Adjust correctly or change bearings |
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Farm Tractors Technical Specifications |