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Kubota L4200 Troubleshooting

The Kubota L4200 is a Grand L series compact utility tractor. This model was manufactured from 1994 to 1999. The Kubota L4200 tractor is powered by Kubota V2203-A 4-cylinder indirect injection diesel engine with a rated power of 45.3 Hp (35.3 kW) and 139.1 Nm (102.9 lb-ft) of max torque at 1500 rpm.

The Kubota L4200 was fitted with 2 types of transmission: 8x8 FST Sync Shuttle fully synchronized transmission or Glide Shift transmission with 8 forward and 8 reverse gears (16x16 with creeper). The maximum travel speed (forward/reverse): 14.7 mph (23.7 km/h) and 13.5 mph (21.7 km/h).

The open center hydraulic system used a gear pump with a flow rate of 7.8 gal/min (29.5 l/min). The main relief pressure is 173 bar (2520 psi). The 2-wheel drive models are equipped with 6.00x16 front tires and 14.9x24 rear tires. The 8.3x16 front tires and 14.9x24 rear tires are used for tractors with 4-wheel drive. The wheelbase is 71.3" (1810 mm) for models with 2WD and 71.1" (1805 mm) for models with 4WD.

The Kubota L4200 is compatible with the following attachments: 60" and 72" front-mount 3-blade mower decks with hydraulic lift system, Kubota LA681 loader with lift capacity to full height of 1499 lbs (679 kg), and Kubota BL4690 backhoe with max digging depth of 90.2" (2290 mm).

Engine Troubleshooting
Engine will not start or difficult to start
Plugged fuel filter - Replace the filter element
No fuel supply from the tank - Open the fuel supply valve
Air in fuel system - Air-bleed fuel system
Clogged or damaged injectors - Test fuel injectors and change if necessary
Fuel injection pump is not operating properly - Change or repair the pump
Bad engine compression - Check and replace worn parts
Engine stops running while driving
Engine is cold - Warm up engine as required
Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system
Bad fuel injection - Check and adjust
Fuel filter clogging - Change the filter element
Dirty or faulty injectors - Clean or replace fuel injectors
Diesel engine stops after starting
Timing of fuel injection pump is wrong - Fuel injection pump timing adjustment needs to be corrected
Dirty fuel filter element - Clean or change the filter
Fuel injector nozzles are dirty - Service or replace nozzles if required
Fuel injection pump is damaged - Replace injection pump or repair it
Clogged air cleaner - Replace or service air cleaner element
Engine stalls at low idle speed
Low idle speed set incorrectly - Adjust low idle speed
Fuel injection pump is not working correctly - Replacement or repair required
Fuel injector nozzles are dirty or defective - Service or replace nozzles if required
Valve out of adjustment - Adjust valve clearance
Engine overheats
Coolant level is low - Fill radiator to proper level. Repair any leaks if necessary
Cooling system components are failed or system is dirty - Replace faulty parts or flush the cooling system
Low engine oil level - Check and refill engine oil
Fan belt tension is unadjusted or belt is damaged - Adjust correctly or install new belt
Thermostat fault - Install new thermostat
Engine power is too low
Fuel injectors are clogged or faulty - Service or change fuel injectors
Uneven fuel injection pressure - Adjust to proper pressure
Air filter element clogging - Clean or replace the air filter element
Oil filter element clogging - Service or replace engine oil filter
Engine is overloaded - Load reducing is recommended
The valve clearance is incorrect - Correct valve clearance needs to be set
Low idle speed setting is not correct - Normalize low idle speed
Dirt in the hoses or pipes - Service fuel hoses and pipes
Lack of compression: Inlet or outlet valves are defective - Install new valves
Abnormal engine noise or knocking
Unadjusted fuel injection pump timing - Repair or replace fuel injection pump
Fuel injector nozzles are damaged - Test injector nozzles and replace as required
Lack of engine oil - Add oil to the engine crankcase
Engine is cold - Warm up the engine
Worn crankshaft or main bearings - Crankshaft or bearings need to be replaced
Damaged or defective piston rings - Piston rings need to be replaced
Flywheel screws are loose - Tighten the screws firmly
Engine consuming too much oil
Oil leaks: Defective seals or gaskets - Replace to repair leaks
Incorrect oil viscosity - Fill up with the correct oil viscosity
Damaged or seized piston rings - Replace piston rings
Valve guides and stems are worn - Need to replace the valves
Pistons or cylinder liners are worn - Inspect pistons and liners, change as required

Electrical System Troubleshooting
Battery cannot be charged
Defective battery - Install a new battery
Damaged battery cable harness - Check electrical cables for damage, repair or replace
Loose or corroded battery terminals and cables - Tighten or clean terminals and cables
Belt wear or improper belt tension adjustment - Install new belt or adjust belt tension as required
Starter turns slowly
Low battery voltage - Battery is drained, recharge it
Battery runs out quickly - Service battery or replace it
Battery electrical wire harness failure - Inspect wires for defects, change or repair
Battery cables and terminals are loose or corroded - Cables and terminals must be tightened or cleaned
Starter will not work
Battery voltage is low - Low battery charging, charge as required
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
Difficulty shifting gears
Worn or misadjusted clutch - Adjust or replace the clutch
Stuck or damaged gear shift linkage - Replace or repair the shift linkage
Shift forks are damaged or worn - Change defective shift forks
Defective gearshift mechanism - Replace defective components
Lack of transmission oil pressure
Oil level is insufficient - Fill up the transmission oil
Transmission fluid filter clogging (if fitted) - Change or service the transmission fluid filter
Relief valve is faulty - Replace the valve
Transmission makes excessive noise
Cracked or worn bearings - Faulty bearings should be replaced
Insufficient oil supply - Check transmission oil level and add oil as required
Dirty transmission fluid - Change transmission fluid
Worn gears or improper backlash - Set backlash properly or change the gears
Bent or worn shift forks - Replace defective shift forks
Transmission oil leaks
Seals or gaskets are damaged - Change defective gaskets or seal
Transmission case is cracked - Replace case or transmission assembly

Hydraulics Troubleshooting
Hydraulic system overheated
Hydraulic system pressure is not set correctly - Set the hydraulic pressure as required
Main relief valve malfunction or incorrect adjustment - Adjust or change relief valve
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid
Air enters in hydraulic system - Inspect the suction pipe, fittings, and pump seals
Low hydraulic system pressure
Not enough hydraulic fluid in the system - Need to add fluid
Dirty hydraulic oil filter - Clean or change hydraulic filter
Hydraulic pump is faulty - Check pump capacity and change if necessary
Hydraulic spool valve block is not set properly or defective - Replace or set correctly
Hydraulic cylinder is not working - Check cylinder parts for wear or damage and replace if necessary
Hydraulic piping leaks - Identify leaks in the system and repair it
3-point hitch lifts slowly or won't lift
Hydraulic fluid level is insufficient - Add fluid to the hydraulic system
Cold oil in hydraulic system - Wait for oil to warm up
Hydraulic fluid filter is dirty - Change the hydraulic filter element or service if required
Hydraulic pump not working - Test the pump performance and change pump if required
Main relief valve is faulty or misadjusted - Adjust or replace the relief valve
Hydraulic control valve is defective or set improper - Adjust properly or change
Hydraulic cylinder malfunction - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Loose or damaged suction line - Tighten or replace
3-point hitch won't drop or drops slowly
Hydraulic control valve is defective or set improper - Change or set correctly
Faulty hydraulic cylinder - Inspect cylinder parts for wear or damage and replace if required
Worn lift arm shaft - Change the shaft
Defective mechanical parts of the hitch - Change damaged or worn hitch parts
Hitch jerks when lift or lower
Aeration in hydraulic system - Inspect the suction pipe, fittings, and pump seals
Dirty hydraulic oil - The oil must be changed
Faulty hydraulic oil pump - Check pump capacity and change if necessary
Hydraulic spool valve block is faulty or out of adjustment - Replace or adjust correctly
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required

Steering System Troubleshooting
Heavy steering
Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly
Air leaks in steering system - Bleed the system of air
Incorrect toe-in - Adjust toe-in wheels properly
Improper tire pressure - Check the pressure and inflate tires as required
Steering pump malfunction - Repair or change steering pump
Defective or worn hydrostatic steering unit - Replace or repair steering unit as required
Relief valve malfunction or seizing - Inspect relief valve and replace if necessary
Steering fluid insufficient - Check and refill steering fluid
Steering system has oil leaks - Retighten steering hose and pipe connections
Excessive steering wheel free play
Worn steering column coupling or shaft - Replace faulty component
Hydrostatic steering unit is defective or worn - Repair or replace the steering unit
Damaged hydraulic steering pump - Install a new steering pump
Worn or faulty steering linkage or tie-rod ends - Change damaged part
Front wheels wander to left or right
Improper tire pressure - Check the pressure and inflate tires as required
Improper toe-in - Check toe-in and correct
Steering linkage or tie-rod ends are worn - Change failed part
Hydrostatic steering unit has wear or malfunction - Inspect and replace as required
Steering cylinder is faulty - Repair or replace hydraulic steering cylinder
Defective or improperly adjusted front hub bearings - Change or adjust bearings correctly



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