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Kubota BX2350 Troubleshooting

The Kubota BX2350 is a BX50 series compact utility tractor. This model was manufactured from 2006 to 2008. The components of Kubota BX2350 driveline system: D902 vertical 3-cylinder indirect injection liquid-cooled diesel engine and 2-range hydrostatic transmission.

A 54.8 cubic inches engine power is 20.4 Hp (15.2 kW), and a maximum torque is 56.1 Nm (41.4 lb-ft) at 2200 rpm. The max. forward speed - 8.1 mph (13 km/h), a maximum reverse speed - 6.2 mph (10 km/h). The open center hydraulic system includes a gear pump with rated capacity of 6,3 gpm (23,8 lpm).

The hydraulic system pressure is 160 bar (2320 psi). A three-point hitch lift capacity is 990 lbs (450 kg). The 4WD Kubota BX2350 tractor fitted with 18x8.50-10 front tires and 26x12.00-12 rear tires. The wheelbase is 55.1 inches (1390 mm). The tractor is compatible with Kubota LA243 front end loader. The loader has a 48" bucket and maximum lift height of 71.3" (1810 mm).

Engine Troubleshooting
Engine will not start or difficult to start
Fuel filter plugging - Replace the filter element
No fuel injection - Open fuel cock to inject fuel
Air in fuel pipes - Bleed fuel pipes
Dirty or damaged injectors - Clean or replace fuel injectors
Fuel injection pump malfunctioning - Rebuild or change fuel pump
Bad engine compression - Check and change damaged parts
Engine stops during operation
Engine is not preheated - Warm up the engine
There is air in the fuel system - Bleed the system
Bad fuel injection - Check and adjust
Fuel filter clogging - Change the filter element
Dirty or damaged injectors - Inspect fuel injectors and replace if necessary
Diesel starts and immediately stops
Timing of fuel injection pump is wrong - Adjust injection timing
Fuel filter clogging - Change the filter element
Fuel injector nozzles are dirty or defective - Inspect injector nozzles and change if required
Defective fuel injection pump - Repair or install a new fuel pump
Air cleaner element clogging - Air cleaner maintenance required
Engine stalls while idling
Too low idle RPM - Test and adjust
Fuel injection pump is faulty - Rebuild or replace pump
Fuel injector nozzles are damaged - Inspect injector nozzles and change if required
Improper valve clearance - Check and adjust
Engine overheating
Lack of engine coolant - Fill cooling system to proper level. 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 - Need to add engine oil
Fan belt is worn or belt tension is improper - Adjust properly or change the belt
Defective thermostat - Replace the thermostat
Lack of engine power
Dirty or faulty injectors - Service or change fuel injectors
Fuel injection pressure is wrong - Adjust to correct pressure
Clogged air filter element - Replace or clean the air filter element
Engine oil filter is plugged - Clean or change engine oil filter
Diesel engine overloaded - Reduce engine load
The valve clearance is incorrect - Have it adjusted
Low idle speed setting is incorrect - Normalize low idle speed
Dirt in the fuel pipes or hoses - Clean fuel system hoses and pipes
Engine compression is insufficient: Inlet or outlet valves are defective - Have valves replaced
Engine noise or knocking
Incorrect setting of fuel injection pump timing - Correct injection timing
Fuel injector nozzles are damaged - Replace fuel injector nozzles
Not enough engine oil - Checking oil level and add if necessary
Coolant temperature is low - Normalize the temperature by warming up the engine
Worn main bearings or crankshaft - Crankshaft or bearings need to be replaced
Broken or defective piston rings - Replace piston rings
The flywheel to crankshaft bolts are loose - Tighten bolts as required
Engine oil consumption is too high
External oil leaks: Gaskets or seals are excessively worn - New components need to be installed
Improper oil viscosity - Use proper viscosity oil
Piston rings are stuck or broken - Change the piston rings as required
Valve stems or guides are damaged - Need to replace the valves
Cylinder liners or pistons are scuffed - Check liners and pistons, install new components as required

Electrical System Troubleshooting
Battery will not charge
Battery dead cell - Change the battery
Battery cable harness damage - Check battery cables for damage, change or repair
Loose or corroded cables and terminals - Clean or tighten terminals and cables
Improper belt tension adjustment or damaged belt - Install new belt or adjust belt tension as required
Starter cranks slow
Battery power is low - Low battery charging, charge as required
Battery drains quickly - Service or change the battery
Battery cable harness damage - Check battery cables for damage, change or repair
Corroded or loose cables and terminals - Service or tighten battery cables and terminals
Starter motor won't turn
Low battery voltage - Recharge the battery
Drained or faulty battery - Recharge or change battery
Starter motor is defective - Starter needs to be changed
Wiring is improperly connected or disconnected - Need to reconnect the wiring properly

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission is making noise
Contaminated oil or low oil level - Pour fresh oil or add oil to proper level
Speed control rod linkage is worn or not adjusted - Change or adjust rod linkage
Relief valve is defective - Install a new valve
Transmission overloaded - Reduce loading
Defective or worn components of hydrostatic transmission - Change or repair damaged parts
Transmission fluid is too hot
Fluid level is low - Add transmission fluid as required
Transmission fluid filter is dirty - Clean or replace the transmission fluid filter
Damaged or clogged cooling components - Inspect all cooling components and service or replace if necessary
Transmission is under excessive load - Reduce the load is required
Low power
Low transmission fluid level - Fill the transmission housing with fluid
Insufficient charge pressure - Test charge pressure
Defective or worn relief valve - Replace relief valve
External oil leaks
Worn gaskets or seals - Install new gaskets or seal
Internal transmission case pressure is too high - Replace or repair defective components
Oil return tube is clogged - Inspect tube and service if required

Hydraulics Troubleshooting
Hydraulic system overheats
Improper hydraulic system pressure setting - Set the pressure properly
Defective or misadjusted main relief valve - Adjust or change relief valve
Contaminated hydraulic oil - Change hydraulic oil
Air leaks in hydraulic system - Check the suction line, pump seals, and fittings
Insufficient hydraulic oil pressure
Hydraulic oil level is low - Fill up the hydraulic oil
Hydraulic fluid filter is clogged - Service the hydraulic filter or change if required
Hydraulic pump failure - Check pump flow and change pump if necessary
Faulty or incorrect setting hydraulic spool valve - Change or set correctly
Hydraulic cylinder failure - Check cylinder parts for wear or damage and replace if necessary
Hydraulic piping leaks - Find leaks in the system and fix it
Hitch fails to lift or lifts slowly
Not enough hydraulic oil in the system - Fill the hydraulic system with oil
Cold hydraulic fluid - Warm up the fluid
Hydraulic oil filter element is dirty - Install a new hydraulic filter element
Hydraulic pump is faulty - Check pump flow and install new pump if necessary
Main relief valve failure or incorrect setting - Adjust or change relief valve
Defective or not adjusted hydraulic spool valve - Change or adjust correctly
Hydraulic cylinder is broken - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Damaged or loose hydraulic suction line - Tighten or change it
3-point hitch lowers slowly or won't lower
Hydraulic spool valve block is faulty or out of adjustment - Replace or adjust correctly
Broken hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Hitch rock shaft is damaged - Change the shaft
Mechanical parts of the hitch are damaged - Replace faulty or worn hitch components
Three-point hitch raises or lowers not smoothly
Air leaks in hydraulic system - Check the pump seals, suction pipe, and fittings
Hydraulic oil contamination - Change the oil
Hydraulic pump is faulty - Check the pump capacity and replace pump if required
Hydraulic spool valve block is defective or set improper - Adjust correctly or change
Broken hydraulic cylinder - Inspect the hydraulic cylinder components for damage or wear and change if required

Steering System Troubleshooting
Steering wheel is difficult to turn
Steering column is worn or improperly fitted - Refit properly or change the steering column
Air trapped in the steering system - Bleed air
Incorrect toe-in adjustment - Adjust toe-in correctly
Tire pressure is low - Tires need to be inflated
Damaged hydraulic steering pump - Repair or change steering pump
Faulty or worn hydrostatic steering unit - Repair or replace the steering unit
Relief valve is seized or worn - Replace or install new relief valve
Not enough steering oil - Check oil level and add steering oil as required
Steering system oil leakage - Tighten connections of hydraulic hoses and pipes in steering system
Excessive free play of steering wheel
Steering column shaft or coupling has maximum wear - Replace defective component
Hydrostatic steering unit is defective or worn - Repair or change the steering unit
Damaged hydraulic steering pump - Steering pump needs to be repaired or replaced
Steering linkage or tie-rod ends are defective - Change damaged part
Tractor pulls to left or right
Tires are improperly inflated - Inflate as necessary
Improper toe-in adjustment - Adjust toe-in correctly
Faulty or worn steering linkage or tie-rod ends - Replace failed component
Damaged or worn hydrostatic steering unit - Change or repair steering unit if required
Steering cylinder is faulty - Change or repair steering cylinder
Front hub bearings are incorrectly adjusted or worn - Adjust correctly or install new bearings



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