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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 |
