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Kubota M6-141 Troubleshooting
The
Kubota M6-141 is a 4-wheel drive utility tractor from M6 series. This model was
manufactured between 2015 and 2021. The components of Kubota M6-141 driveline
system: a 374 cubic inches (6.1 L) Kubota V6108-TI-CRS 4-stroke 4-cylinder
direct injection turbocharged intercooled diesel engine and Intelli-Shift
partial powershift transmission with 24 forward and 24 reverse gears.
The engine has a cylinder bore of 4.65" (118 mm), piston stroke of 5.51"
(140 mm), and maximum power of 133 hp (99.2 kW). Max forward speed -
22.7 mph (36.6 kph), maximum reverse speed - 22.9 mph (36.9 kph).
The closed center hydraulic system used a piston pump with a flow of
20.4 gpm (77.2 lpm). The hydraulic system pressure is 200 bar (2900
psi). The Kubota M6141 is equipped with a hydrostatic power steering,
hydraulic wet disc brakes, 14.9R24 front tires, and 18.4R38 rear tires.
The wheelbase is 105.5" (2670 mm). The tractor is compatible with a
Kubota LA2255 front-end loader with lift capacity to full height of 4877
lbs (2212 kg) and breakout force of 7639 lbs (3465 kg).
| Engine Troubleshooting |
| Engine doesn't start or hard to start |
| Fuel filter plugging - Filter maintenance required |
| No fuel supply from the tank - Open the fuel supply valve |
| Air in fuel lines - Bleed fuel lines |
| Faulty or dirty injectors - Service or change fuel injectors |
| Fuel injection pump is not working correctly - Rebuild or replace pump |
| Low cylinder compression - Inspect cylinder block and replace worn components |
| Engine shuts off while driving |
| Low coolant temperature - Warm up the engine to required temperature |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Improper fuel injection - Fuel injection settings required |
| Fuel filter is dirty - Change the filter element |
| Fuel injectors are damaged or dirty - Change fuel injectors |
| Engine starts and then stalls |
| Fuel injection pump out of timing - Check and correct settings |
| Fuel filter plugging - Clean or replace the filter |
| Fuel injector nozzles are dirty - Replace fuel injector nozzles |
| Fuel injection pump is not operating properly - Install a new pump or rebuild |
| Air cleaner element is clogged - Service or change air cleaner |
| Wrong adjustment of low idle speed - Need to adjust idle speed |
| Fuel injection pump malfunctioning - Replace or rebuild injection pump |
| Fuel injector nozzles are damaged or dirty - Change injector nozzles |
| The valve clearance is not adjusted - Adjustment procedure required |
| Insufficient coolant fluid - Top up coolant fluid. If there are leaks in the system, replace worn components |
| Cooling system parts are worn or system is clogged - Flush cooling system or replace faulty parts |
| Engine oil level is low - Checking oil level and add if necessary |
| Fan belt tension is incorrect or belt is broken - Adjust belt tension correctly or change it |
| Thermostat failure - Check thermostat, replace if necessary |
| Dirty or faulty injectors - Clean or replace fuel injectors |
| Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly |
| Clogged air filter element - Air filter maintenance required |
| Oil filter is clogged - Change or service engine oil filter |
| Diesel engine overloaded - Load reducing required |
| Improper valve clearance - Check and adjust |
| Low idle speed setting is not correct - Adjust as required |
| Fuel hoses or pipes are clogged - Service fuel hoses and pipes |
| Engine losing compression: Valves are defective or worn - Replace the valves |
| Engine knocking sound or abnormal noise |
| Fuel injection pump timing is incorrect - Fuel injection pump timing adjustment needs to be corrected |
| Fuel injector nozzles fault - Install new set of properly balanced nozzles |
| Engine oil insufficient - Checking oil level and add if necessary |
| Low coolant temperature - Warm up the engine as required |
| Main bearings or crankshaft wear - Need to install new components |
| Damaged or defective piston rings - Piston rings replacement required |
| Flywheel mounting screws are loose - Tighten the screws |
| Engine using too much oil |
| Oil leaks: Defective seals or gaskets - Change to repair leaks |
| Wrong oil viscosity - Use proper viscosity oil |
| Piston rings are stuck or broken - Have piston rings replaced |
| Damaged valve stems or valve guides - Valves need to be changed |
| Pistons or cylinder liners are scored - Inspect pistons and liners, fit new components as necessary |
| Electrical System Troubleshooting |
| Battery will not charge |
| Defective battery - Install a new battery |
| Battery cable harness damage - Check battery cables for damage, change or repair |
| Loose or corroded battery terminals and cables - Service or tighten battery terminals and cables |
| Belt damage or incorrect belt tension adjustment - Adjust belt tension properly or change belt |
| Low battery output voltage - Battery needs to be recharged |
| Battery runs out quickly - Battery needs to be serviced or replaced |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Loose or corroded terminals and cables - Tighten or service cables and terminals |
| Battery capacity is low - Recharge the battery |
| Drained or faulty battery - Recharge or change battery |
| Starter motor failure - Starter should be changed |
| Wiring harness is disconnected or improperly connected - Check wiring harness and reconnect properly |
| Transmission Troubleshooting |
| Hard shifts |
| Misadjusted or defective clutch - Adjust correctly or replace |
| Gear shift linkage is loose or broken - Replace or repair the shift linkage |
| Worn or damaged shift forks - Install new shift forks |
| Gearshift mechanism failure - Change or repair failed components |
| Transmission fluid pressure is insufficient |
| Insufficient fluid supply - Check and refill the transmission fluid |
| Transmission oil filter element is clogged (if equipped) - Replace or service transmission oil filter |
| Damaged relief valve - Replace valve as required |
| Damaged or worn bearings - Bearings need to be replaced |
| Insufficient oil supply - Fill up the transmission oil |
| Transmission oil contamination - Change transmission oil |
| Backlash is incorrect or gears are worn - Change worn gears or set backlash correctly |
| Bent or worn shift forks - Change the shift forks |
| Gaskets or seals are defective Install new seal or gaskets |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system is too hot |
| Hydraulic system pressure is not adjusted correctly - Correct adjustment is required |
| Faulty or incorrectly adjusted main relief valve - Replace or set up the relief valve |
| Dirty hydraulic oil - The oil must be changed |
| Air trapped in the hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic oil pressure too low |
| Not enough hydraulic fluid in the system - Fill the hydraulic system with oil |
| Dirty hydraulic oil filter - Hydraulic filter maintenance required |
| Hydraulic pump malfunction - Test the pump performance and change pump if required |
| Faulty or incorrect setting hydraulic spool valve - Adjust correctly or change |
| Hydraulic cylinder is broken - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Hydraulic pipes are leaking - Identify leaks in the system and repair it |
| Hitch cannot be raised or raising is too slowly |
| Hydraulic oil level is insufficient - Fill the hydraulic system with oil |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Hydraulic oil filter is dirty - Install a new hydraulic filter element |
| Hydraulic pump is defective - Test pump performance and replace pump if necessary |
| Main relief valve malfunction or incorrect adjustment - Replace or set up the relief valve |
| Hydraulic spool valve block is not set properly or defective - Replace or adjust properly |
| Broken hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
| Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe |
| 3-point hitch lowers slowly or won't lower |
| Defective or incorrect setting hydraulic control valve block - Adjust properly or change |
| Hydraulic cylinder failure - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Lift arm shaft is damaged - Replace the shaft |
| Damaged mechanical components of the hitch - Replace damaged or worn hitch components |
| Hitch is lowered or raised jerkily |
| Air trapped in the hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic oil contamination - Change the oil |
| Faulty hydraulic oil pump - Check pump capacity and change if necessary |
| Hydraulic control valve is defective or set improper - Adjust correctly or change |
| Hydraulic cylinder malfunction - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Steering System Troubleshooting |
| Steering is hard |
| Worn or improperly mounted steering column - Mount the steering column properly or change it |
| Air enters in steering system - Bleed the system of air |
| Toe-in adjustment is incorrect - Check and adjust toe-in |
| Tire pressure is improper - Inflate the tires properly |
| Defective hydraulic steering pump - Replace or repair steering pump |
| Worn or damaged hydrostatic steering unit - Repair or change the steering unit |
| Relief valve failure or sticking - Check relief valve and change if required |
| Not enough steering oil - Check oil level and add steering oil as required |
| Oil leakage in the steering system - Retighten steering pipe and hose connections |
| Excessive play in steering |
| Steering column shaft or coupling is worn out - Change defective part |
| Worn or defective hydrostatic steering unit - Inspect and replace as required |
| Steering pump is worn - Check the hydraulic steering pump and change if necessary |
| Worn or faulty steering tie-rod ends or linkage - Change failed component |
| Tractor pulls to left or right |
| Tire pressure is not correct - Check tire pressure and inflate as required |
| Not adjusted toe-in - Adjust toe-in correctly |
| Steering linkage or tie-rod ends are worn - Replace damaged part |
| Damaged or worn hydrostatic steering unit - Repair or replace the steering unit |
| Steering cylinder malfunction - Repair or replace steering cylinder |
| Front hub bearings are worn or incorrectly adjusted - Install new bearings or adjust it correctly |
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| Farm Tractors Technical Specifications |
