Home / Farm Tractors / Kubota Tractors / Kubota M6-111

Kubota M6111 Troubleshooting

The four-wheel drive Kubota M6-111 utility tractor was manufactured between 2015 and 2018. The Kubota M6-111 tractor is equipped with a 230 cu.in (3.8 L) Kubota V3800-TI-CRS 4-cylinder common rail direct injection turbocharged intercooled diesel engine. The engine has a cylinder bore of 3.94" (100 mm), piston stroke of 4.72" (120 mm), and maximum power of 107 hp (79.8 kW). The gear transmission consists of electro-hydraulic wet clutch and partial powershift gearbox with 24 forward and 24 reverse gears.

The maximum forward speed - 22.1 mph (35.6 kph), maximum reverse speed - 22.3 mph (35.9 kph). The closed center hydraulic system has a piston pump with a rated capacity of 18.7 gal/min (70.8 l/min). The hydraulic system pressure is 200 bar (2900 psi). The Kubota M6111 is equipped with a hydrostatic power steering system, hydraulic wet disc brakes, 13.6R24 front tyres, and 18.4R34 rear tyres. The tractor can be equipped with the following attachments: Kubota LA1955 front-end loader with a lift capacity to full height of 4299 lbs (1950 kg).

Engine Troubleshooting
Engine doesn't start or difficult to start
Clogged fuel filter element - Service or replace the filter
The fuel shut-off valve is closed - Open fuel shut-off valve
Air in fuel lines - Bleed fuel lines
Dirty or damaged injectors - Change fuel injectors
Damaged fuel injection pump - Replace or repair injection pump
Low cylinder compression - Check cylinder block and replace damaged components
Engine stalls while running
Engine is not preheated - Warm up the engine
Air in fuel lines - Bleed fuel lines
Bad fuel injection - Check and adjust
Fuel filter is dirty - Service the filter
Fuel injectors are defective or dirty - Clean or replace fuel injectors
Diesel starts but suddenly stops
Unadjusted fuel injection pump timing - Repair or replace fuel injection pump
Clogged fuel filter element - Filter maintenance required
Dirty or defective injector nozzles - Check and change nozzles as required
Fuel injection pump is not working correctly - Rebuild or install a new injection pump
Dirty air cleaner - Clean or replace the air cleaner element
Engine stops at idle
Improperly adjusted low idle speed - Correct the settings
Defective fuel injection pump - Replace or repair injection pump
Damaged or clogged injector nozzles - Check and change nozzles as required
The valve clearance is incorrect - Correct valve clearance
Engine overheats
Insufficient coolant fluid - Add the coolant. Check system for leaks
Cooling system components are worn or system is clogged - Service the cooling system or change faulty parts
Lack of engine oil - Check oil level and add oil as required
Worn fan belt or improper belt tension - Adjust belt tension properly or change it
Thermostat malfunction - Check thermostat, replace if necessary
Lack of engine power
Fuel injectors are clogged or faulty - Change fuel injectors
Incorrect fuel injection pressure - Test fuel injection pressure and adjust it correctly
Air filter element is clogged - Air filter maintenance required
Dirty oil filter element - Replace or service engine oil filter
Engine is overloaded - Load reducing is recommended
Valve clearance is out of adjustment - Correct valve clearance
Low idle speed set incorrectly - Need to adjust idle speed
Fuel pipes or hoses clogging - Service fuel hoses and pipes
Low engine compression: Inlet or outlet valves are defective - Valve replacement required
Engine knocking or noise
Unadjusted fuel injection pump timing - Adjust the fuel injection pump timing correctly
Fuel injector nozzles are dirty or defective - Service or replace injector nozzles
Lack of engine oil - Fill up the oil to required level
Coolant temperature is low - Warm up the engine
Main bearings or crankshaft are worn out - Install new parts
Piston rings are damaged or broken - Have piston rings replaced
Flywheel bolts are loose - Bolts need to be tightened
Engine oil consumption is too high
Oil leaking: Seals or gaskets are wearing excessively - Change to repair leaks
Wrong oil viscosity - Use correct viscosity oil
Piston rings are seized or worn - Install new piston rings
Worn valve stems and valve guides - Valves need to be changed
Cylinder liners or pistons are worn - Check pistons and liners, install new parts as required

Electrical System Troubleshooting
Battery does not charge
Worn-out battery - Change the battery
Battery wiring harness failure - Inspect electrical cables for defects, repair or replace
Battery terminals and cables are corroded or loose - Tighten or service cables and terminals
Belt is damaged or belt tension is incorrectly adjusted - Replace belt or properly adjust belt tension
Starter motor turns slow
Battery power is low - Low battery charging, charge as required
Battery runs out quickly - Service or change the battery
Damaged battery wiring harness - Inspect wiring for damage, replace or repair
Loose or corroded terminals and cables - Tighten or service terminals and cables
Starter does not work
Low battery output - Charge the battery
Discharged or faulty battery - Battery needs to be recharged or replaced
Defective starter motor - Repair or replace starter
Wiring harness is disconnected or improperly connected - Check wiring harness and reconnect properly

Transmission Troubleshooting
Gear hard to shift
Failure or improper clutch adjustment - Replace or adjust clutch
Damaged or loose gear shift linkage - Repair or change shift linkage
Shift forks are damaged or worn - Replace defective shift forks
Defective gearshift mechanism - Replace defective components
Insufficient transmission fluid pressure
Fluid level is low - Check transmission fluid level and add it as required
Transmission fluid filter is plugged (if fitted) - Change or service the transmission fluid filter
Relief valve is defective - Install a new relief valve
Transmission makes excessive noise
Damaged or worn bearings - Replace the bearings
Fluid level is low - Fill up the transmission fluid
Transmission fluid contamination - Change transmission fluid
Damaged gears or improper backlash - Replace gears or adjust backlash properly
Worn or damaged shift forks - Install new shift forks
Transmission fluid leaking
Gaskets or seals are damaged - Change defective gaskets or seal
Transmission housing is cracked - Replace housing or transmission assembly

Hydraulics Troubleshooting
Hydraulic system overheats
Incorrect hydraulic pressure adjustments - Adjust correctly
Misadjusted or defective main relief valve - Adjust or change relief valve
Contaminated hydraulic oil - Change hydraulic oil
Air trapped in the hydraulic system - Check the suction pipe, fittings, and pump seals
Low hydraulic system pressure
Not enough hydraulic fluid in the system - Need to add fluid
Hydraulic oil filter is dirty - Clean or change hydraulic filter
Defective hydraulic pump - Check pump capacity and change if necessary
Hydraulic spool valve block is defective or set improper - Replace or adjust correctly
Hydraulic cylinder is broken - Inspect cylinder parts for wear or damage and replace if required
Leakage in hydraulic pipes - Find leaks in hydraulic system and repair it
Hitch cannot be lifted or lifting is too slow
Hydraulic fluid level is low - Fill the hydraulic system with oil
Cold fluid in hydraulic system - Wait for fluid to warm up
Hydraulic oil filter is dirty - Replace filter element or clean if required
Faulty hydraulic oil pump - Flow-rate pump and change pump if necessary
Defective or misadjusted main relief valve - Adjust the valve or replace if necessary
Faulty or incorrect setting hydraulic control valve - Adjust properly or replace
Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe
Three-point hitch dropping is too slow or cannot be dropped
Hydraulic control valve block is faulty or out of adjustment - Change or adjust correctly
Hydraulic cylinder failure - Check the hydraulic cylinder parts for damage or wear and replace if necessary
Worn lift arm shaft - Install a new shaft
The hitch has internal mechanical malfunctions - Replace damaged or worn hitch parts
Hitch jerks when drop or lift
Air enters in hydraulic system - Check the pump seals, suction pipe, and fittings
Contaminated hydraulic oil - Change hydraulic oil
Faulty hydraulic oil pump - Check the pump performance and replace it if required
Damaged or incorrect adjusted hydraulic control valve - Change or adjust correctly
Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required



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