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Kubota M105X Troubleshooting

The Kubota M105X is a 4x4 (4WD) row-crop tractor. This model was manufactured from 2005 to 2007. The Kubota M105X tractor is powered by Kubota V3800-TI-E2 4-cycle 4-cylinder direct injection turbocharged diesel engine.

A 230 cubic inches (3.8L) engine has a cylinder bore of 3.94" (100 mm), piston stroke of 4.72" (120 mm), and rated power of 105 hp (78.3 kW). The Kubota M105X is fitted with two transmission options: Intelli-Shift partial powershift transmission with 16 forward and 16 reverse gears, and Intell-Shift Creeper transmission with 24 forward and 24 reverse gears.

The maximum speed (travel/creeper): 21.4 mph (34.5 km/h) and 0.7 mph (1.1 km/h). The open center hydraulic system includes a gear pump with a flow rate of 18.1 gpm (68.5 lpm). The main relief pressure is 196 bar (2845 psi). The Kubota M105X was equipped with a hydrostatic power steering system, hydraulic wet disc brakes, 13.6R24 front tires, and 18.4R34 rear tires. The wheelbase is 95.9" (2430 mm). The tractor is compatible with a Kubota LA1301S loader with maximum lift height of 143.3" (3630 mm).

Engine Troubleshooting
Engine doesn't start or starts hard
Dirty fuel filter element - Service the filter
Fuel supply valve is closed - Open fuel supply valve
Fuel-line is leaking air - Retighten clamps, replace defective pipes
Fuel injectors are clogged or faulty - Inspect fuel injectors and replace if necessary
Defective fuel injection pump - Repair or change injection pump
Engine has bad compression - Check cylinder block and change faulty parts
Engine stalls while running
Engine is not warmed up to the required temperature - Warm up the engine as required
There is air in the fuel system - Bleed the system
Fuel injection failed - Use correct settings
Fuel filter clogging - Service the filter
Dirty or faulty injectors - Test fuel injectors and change if necessary
Engine starts and stalls immediately
Timing of fuel injection pump is wrong - Check and correct adjustments
Fuel filter clogging - Replace the filter element
Fuel injector nozzles are defective or dirty - Install a new set of well-balanced nozzles
Fuel injection pump failure - Change pump or rebuild it
Clogged air cleaner - Service or replace the air cleaner
Engine stalls while idling
Too low idle RPM - Adjust low idle speed
Fuel injection pump failure - Repair or install new pump
Fuel injector nozzles are defective or dirty - Change injector nozzles
Incorrect valve clearance - Have it adjusted
Engine overheating
Engine coolant is insufficient - Fill radiator to proper level. Any leaks must be repaired
Cooling system parts are worn or system is clogged - Change faulty components or service cooling system
Engine oil insufficient - Add oil to the engine crankcase
Damaged fan belt or incorrect belt tension - Adjust belt tension properly or replace it
Thermostat is defective - Check and replace if required
Lack of engine power
Clogged or damaged injectors - Test fuel injectors and change if necessary
Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly
Dirty air filter element - Install new filter element or replace it
Clogged oil filter - Clean or replace engine oil filter element
Diesel engine overloaded - Change to lower gear or reduce load
The valve clearance is not adjusted - Check and adjust
Wrong adjustment of low idle speed - Adjust low idle speed
Dirt in the fuel pipes or hoses - Clean fuel system pipes and hoses
Engine lost compression: Inlet or outlet valves are defective - Replace the valves
Engine knocks or noises
Timing of fuel injection pump is wrong - Fuel pump timing settings need to be corrected
Damaged or clogged injector nozzles - Install a new set of well-balanced nozzles
Engine oil level is low - Fill the crankcase with engine oil
Engine has not warmed up to recommended temperature - Warm up the engine
Main bearings or crankshaft wear - Worn parts replacement required
Defective or broken piston rings - Piston rings replacement required
Flywheel bolts are loose - Bolts need to be tightened
Diesel engine consuming too much oil
Oil leakage: Seals or gaskets are defective - New components need to be installed
Crankcase oil too light - Use correct viscosity oil
Piston rings are stuck or worn - Piston rings replacement required
Worn valve guides and valve stems - Replace defective valves
Scuffed cylinder liners or pistons - Inspect pistons and liners, replace as required

Electrical System Troubleshooting
Battery is not charging
Worn-out battery - Replace the battery
Damaged battery cable harness - Check electrical cables for damage, repair or replace
Loose or corroded terminals and cables - Terminals and cables need to be tightened or cleaned
Damaged belt or incorrectly adjusted belt tension - Adjust belt tension as required or replace belt
Starter motor turns slow
Low battery voltage - Battery is drained, charge it
Battery is draining quickly - Battery needs to be serviced or replaced
Bad battery wiring harness - Inspect wiring for malfunctions, replace or repair
Loose or corroded cables and terminals - Clean or tighten cables and terminals
Starter is not working
Low battery capacity - Recharge the battery
Discharged or faulty battery - Charge or change the battery
Starter motor failure - Starter should be replaced
Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required

Transmission Troubleshooting
Hard shifts
Clutch is not adjusted or faulty - Adjust correctly or replace
Stuck or damaged gear shift linkage - Change or repair shift linkage
Bent or worn shift forks - Shift forks need to be changed
Gearshift mechanism is worn out - Repair or replace worn components if required
Transmission oil pressure is low
Oil level is insufficient - Add transmission oil as required
Transmission oil filter element is dirty (if fitted) - Change or clean the transmission oil filter
Relief valve is defective - Replace relief valve
Transmission makes noise
Bearings are worn or cracked - Replace the bearings
Not enough oil in transmission - Checking transmission oil level and add if necessary
Transmission oil contamination - Change transmission oil
Worn gears or improper backlash - Change worn gears or set backlash correctly
Damaged or worn shift forks - Replace the shift forks
External fluid leaks
Broken gaskets or seals - Change defective gaskets or seal
Transmission case is cracked - Replace case or transmission assembly

Hydraulics Troubleshooting
Hydraulic system overheated
The system pressure has not been corrected - Make the correct settings
Main relief valve is faulty or misadjusted - Adjust relief valve or change if required
Hydraulic fluid contamination - Change hydraulic fluid
Air in hydraulic system - Inspect the pump seals, suction line, and fittings
Low hydraulic fluid pressure
Hydraulic fluid level is low - Fill the hydraulic system with oil
Hydraulic oil filter clogging - Service or replace the hydraulic filter
Hydraulic pump is defective - Test the pump performance and change pump if required
Hydraulic spool valve is defective or set improper - Replace or adjust correctly
Hydraulic cylinder is broken - Check cylinder components for damage or wear and change if necessary
Hydraulic lines are leaking - Find leaks in the system and fix it
3-point hitch raises slowly or won't raise
Not enough hydraulic fluid in the system - Need to add fluid
Cold fluid in hydraulic system - Wait for fluid to warm up
Hydraulic oil filter is dirty - Clean the hydraulic filter or install new filter element
Hydraulic pump malfunction - Test pump performance and replace pump if necessary
Defective or misadjusted main relief valve - Set up or change the relief valve
Hydraulic spool valve is faulty or out of adjustment - Replace or adjust correctly
Broken hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary
Suction pipe is damaged or loose - Repair or change
Hitch can't drop or drops too slowly
Damaged or incorrect adjusted hydraulic spool valve - Set properly or replace
Hydraulic cylinder failure - Inspect the hydraulic cylinder components for damage or wear and change if required
Lift arm shaft is damaged - Install a new shaft
Hitch has mechanical defects - Replace defective or worn hitch components
Three-point hitch raises or lowers not smoothly
Aeration in hydraulic system - Inspect the pump seals, suction pipe, and fittings
Hydraulic oil contamination - Change the oil
Hydraulic pump not working - Test the pump flow rate and install new pump if required
Hydraulic control valve is not set properly or defective - Set properly or replace
Hydraulic cylinder malfunction - Inspect cylinder parts for wear or damage and replace if required

Steering System Troubleshooting
Steering wheel is difficult to turn
Steering column is broken or improperly installed - Steering column must be installed properly or replaced
Air in steering system - Air-bleed steering system
Not adjusted toe-in - Check toe-in and correct
Tires are improperly inflated - Inflate as necessary
Faulty steering pump - Check the hydraulic steering pump and change if necessary
Hydrostatic steering unit has wear or malfunction - Change or repair steering unit if required
Defective steering cylinder - Change or repair steering cylinder
Relief valve is stuck or worn - Check relief valve and change if required
Insufficient steering fluid - Fill up the steering fluid
Oil leakage in the steering system - Retighten joints of the hydraulic steering pipes and hoses
Excessive steering wheel play
Steering column shaft or coupling has maximum wear - Replace faulty part
Hydrostatic steering unit has wear or damage - Check and replace as required
Steering pump is worn - Steering pump needs to be repaired or replaced
Steering tie-rod ends or linkage are worn - Change failed component
Front wheels wander to left or right
Front tires are worn out - Install new tires
Incorrect toe-in adjustment - Check and adjust toe-in
Faulty or worn steering tie-rod ends or linkage - Replace failed component
Hydrostatic steering unit has wear or damage - Check and replace as required
Defective steering cylinder - Change or repair steering cylinder
Damaged or improperly adjusted or worn front hub bearings - Adjust correctly or replace bearings



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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