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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 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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| Farm Tractors Technical Specifications |
