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