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Kubota MK5000 Troubleshooting
The
Kubota MK5000 compact utility tractor was manufactured between 2015 and 2017.
The Kubota MK5000 driveline consists of Kubota V2403-M-DI vertical 4-cylinder
turbocharged diesel engine and 8x8 gear shift partially synchronized
transmission. A 148.5 cubic inches (2.4 L) engine has a cylinder bore of 3.43"
(87 mm), piston stroke of 4.04" (102 mm), and rated power of 48.4 hp (35.6 kW).
The maximum forward speed - 19 mph (30.4 km/h), maximum reverse speed - 19 mph
(30.4 km/h).
The open center hydraulic system includes a gear pump with rated fluid
flow of 8 gpm (30.5 lpm). The hydraulic system pressure is 180 bar (2600
psi). The Kubota MK5000 is equipped with a hydrostatic power steering,
mechanical wet disc brakes, 9.50x16 or 8.00x16 front tyres, and 13.6x28
or 12.4x28 rear tyres. The wheelbase is 74.9" (1895 mm). The tractor is
compatible with Kubota LA1065EC front-end loader with a lift capacity to
full height of 2090 lbs (948 kg).
| Engine Troubleshooting |
| Engine doesn't start or difficult to start |
| Fuel filter is clogged - Service the filter |
| Fuel shut-off valve closed - Open the fuel shut-off valve |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Fuel injectors are clogged or faulty - Service or change fuel injectors |
| Fuel injection pump damage - Rebuild or replace pump |
| Bad engine compression - Check cylinder block and replace damaged components |
| Engine shuts off unexpectedly while running |
| Coolant temperature is low - Normalize the engine temperature |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Fuel injection failed - Use correct settings |
| Fuel filter is dirty - Clean or change the filter |
| Dirty or damaged injectors - Test fuel injectors and change if necessary |
| Diesel engine stalls after starting |
| Timing of fuel injection pump is wrong - Check the fuel injection pump timing setting |
| Clogged fuel filter element - Clean or replace the filter |
| Fuel injector nozzles are dirty - Inspect injector nozzles and change if required |
| Defective fuel injection pump - Replace or rebuild injection pump |
| Dirty air cleaner element - Service or replace the air cleaner |
| Low idle speed setting is not correct - Adjustment required |
| Fuel injection pump malfunctioning - Rebuild or replace pump |
| Fuel injector nozzles are damaged - Check and change nozzles as required |
| The valve clearance is incorrect - Need to adjust valve clearance |
| Insufficient coolant - Fill the radiator to the required level. Check the components of cooling system |
| Cooling system is dirty or cooling components are damaged - Replace faulty parts or service cooling system |
| Lack of engine oil - Checking oil level and add if necessary |
| Fan belt tension is incorrect or belt is defective - Change or adjust belt tension correctly |
| Defective thermostat - Check thermostat, replace if necessary |
| Diesel engine loses power |
| Fuel injectors are clogged or faulty - Check fuel injectors and replace if required |
| Fuel injection pressure is wrong - Check the fuel injection pressure and adjust if necessary |
| Clogged air filter element - Install new filter element or replace it |
| Oil filter element is dirty - Service or change engine oil filter element |
| Engine is under excessive load - Change to lower gear or reduce load |
| Incorrect valve clearance - Correct valve clearance needs to be set |
| Low idle speed setting is not correct - Correct the settings |
| Restricted fuel hoses or pipes - Clean fuel hoses and pipes |
| Engine lost compression: Leaking or broken valves - Install new valves |
| Timing of fuel injection pump is not adjusted - Adjust the fuel injection pump timing correctly |
| Fuel injector nozzles are clogged or faulty - Install a new set of well-balanced nozzles |
| Engine oil insufficient - Checking oil level and add if necessary |
| Engine has not warmed up to recommended temperature - Normalize the engine temperature |
| Crankshaft or main bearings failure - Have bearings or crankshaft replaced |
| Broken or defective piston rings - Piston rings need to be replaced |
| Loose flywheel bolts - Inspect flywheel bolts and tighten properly |
| Excessive oil consumption |
| Oil leaks: Seals or gaskets are wearing excessively - To repair leaks, replace worn parts |
| Incorrect oil viscosity - Fill up with the correct oil viscosity |
| Seized or wear piston rings - Piston rings need to be replaced |
| Valve stems and guides are worn - Valves must be replaced |
| Damaged pistons or cylinder liners - Check pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery faulty cell - Use a new battery |
| Bad battery cable harness - Inspect cables for malfunctions, repair or change |
| Battery terminals and cables are loose or corroded - Tighten or service terminals and cables |
| Belt is defective or belt tension is improperly adjusted Adjust belt tension correctly or replace belt |
| Battery voltage is low - Recharge the battery |
| Battery will not hold charge - Service charging system or install new battery |
| Battery electrical wire harness damage - Check battery wires for damage, replace or change |
| Battery terminals and cables are corroded or loose - Cables and terminals must be tightened or cleaned |
| Battery capacity is low - Recharge the battery |
| Discharged or defective battery - Need to charge or replace the battery |
| Starter motor is defective - Starter should be replaced |
| Disconnected or incorrectly connected cables - Inspect battery cables and connect correctly |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Clutch is unadjusted or worn - Adjust or replace the clutch |
| Gear shift linkage is loose or broken - Replace or repair the shift linkage |
| Bent or worn shift forks - Change the shift forks |
| Faulty parts in the gear shifting mechanism - Change faulty parts |
| Low transmission pressure |
| Low transmission fluid level - Add transmission fluid as required |
| Transmission fluid filter is dirty (if equipped) - Change or service the transmission fluid filter |
| Relief valve is defective - Replace relief valve as required |
| Excessive transmission noise |
| Damaged or worn bearings - Faulty bearings should be replaced |
| Not enough oil in transmission - Fill the transmission housing to proper oil level |
| Transmission oil contamination - Fill up with fresh transmission oil |
| Gears are worn or backlash is improper - Set backlash correctly or change the gears |
| Worn or damaged shift forks - Shift forks need to be replaced |
| Broken gaskets or seals - Gaskets or seal replacement required |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Incorrect hydraulic pressure adjustments - Adjust correctly |
| Defective or misadjusted main relief valve - Set up or change the relief valve |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Air in hydraulic system - Check the suction pipe, fittings, and pump seals |
| Low hydraulic fluid pressure |
| Hydraulic oil level is insufficient - Add oil to the hydraulic system |
| Hydraulic oil filter element clogging - Service the hydraulic filter or change if required |
| Faulty hydraulic oil pump - Check the pump capacity and replace pump if required |
| Hydraulic spool valve block is defective or set improper - Replace or adjust properly |
| Broken hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Leakage in hydraulic pipes - Find leaks in the system and fix it |
| Hitch cannot be lifted or lifting is too slow |
| Lack of hydraulic oil - Fill up the hydraulic oil |
| Cold hydraulic oil - Warm up the oil |
| Hydraulic oil filter is dirty - Clean or change hydraulic filter |
| Defective hydraulic pump - Test pump performance and replace pump if necessary |
| Misadjusted or defective main relief valve - Adjust relief valve or change if required |
| Damaged or incorrect adjusted hydraulic spool valve - Replace or set correctly |
| Broken hydraulic cylinder - Inspect the hydraulic cylinder components for damage or wear and change if required |
| Broken or disconnected suction line - Connect or replace |
| Hitch not dropping or hitch drops slowly |
| Hydraulic spool valve is not set properly or defective - Change or adjust properly |
| Broken hydraulic cylinder - Inspect the hydraulic cylinder components for damage or wear and change if required |
| Worn hitch cross shaft - Replace the shaft |
| The hitch is defective if there is internal mechanical damage - Change damaged or worn hitch parts |
| Hitch jerks when lift or lower |
| Hydraulic system sucks air - Check the suction pipe, fittings, and pump seals |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Faulty hydraulic oil pump - Check the pump performance and replace it if required |
| Hydraulic control valve is defective or set improper - Replace or set properly |
| Hydraulic cylinder failure - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Heavy steering |
| Steering column is broken or improperly installed - Steering column must be installed properly or replaced |
| Air enters in steering system - Air-bleed steering system |
| Steering filter element is clogged - Clean or change it |
| Incorrect toe-in adjustment - Adjust toe-in properly |
| Tires are incorrectly inflated - Inflate as required |
| Hydraulic steering pump is defective - Check the hydraulic steering pump and change if necessary |
| Damaged or worn steering metering unit - Inspect and replace as required |
| Faulty steering box components - Replace defective components of power steering gearbox |
| Relief valve sticking or malfunction - Install a new relief valve or clean it |
| Low steering fluid level - Fill the steering system with fluid |
| Steering system has oil leaks - Tighten the steering pipe and hose joints |
| Steering wheel has too much free-play |
| Steering column shaft or coupling is worn out - Replace defective component |
| Worn or defective steering metering unit - Inspect and replace as required |
| Damaged steering gearbox components - Repair power steering box |
| Steering pump failure - Check the steering pump and replace if necessary |
| Steering tie-rod ends or linkage are defective - Change failed component |
| Tractor pulls to left or right |
| Tires are not properly inflated - Inflate tires as required |
| Toe-in adjustment is incorrect - Adjust toe-in wheels properly |
| Steering linkage or tie-rod ends are worn - Replace damaged part |
| Faulty steering box parts - Replace defective components of power steering gearbox |
| Defective or worn steering unit - Check and replace as required |
| Steering cylinder is worn - Repair or change steering cylinder |
| Incorrectly adjusted or worn front hub bearings - Change or adjust the bearings properly |
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| Farm Tractors Technical Specifications |
