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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
Engine stalling at idle
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
Engine is overheated
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
Loss of engine power
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
Starter motor turns slow
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
Starter motor won't turn
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
Transmission noise
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
Transmission oil leaks
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



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