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Kubota M8580 Troubleshooting
The
Kubota M8580 utility tractor from M80 Series was manufactured from 1991 to 1999.
The Kubota M8580 powertrain system components: a 284.7 cu.in (4.7 L) Kubota
V4702-A 4-cylinder direct injection water-cooled diesel engine and power shuttle
transmission with 12 forward and 12 reverse gears. The engine has a cylinder
bore of 4.29" (109 mm), piston stroke of 4.92" (125 mm), and rated power of 85
hp (63 kW). The maximum travel speed (forward/reverse): 22.5 mph (36 kph) and
22.2 mph (35.5 kph).
The open center hydraulic system has a gear pump with a rated capacity
of 21.1 gal/min (79.9 l/min). The Kubota M8580 is equipped with a
hydrostatic power steering, hydraulic wet disc brakes, 12.4x24 or
13.6x24 front tyres, and 16.9x34 or 18.4x34 rear tyres. The tractor can
be equipped with the following attachments:
Kubota M1410 front-end loader
with a lift capacity to full height of 3100 lbs (1406 kg), or
Kubota M1275 front-end loader
with a lift capacity to full height of 2800 lbs (1270 kg).
| Engine Troubleshooting |
| Engine will not start or difficult to start |
| Plugged fuel filter - Replace filter element |
| Fuel shut-off valve closed - Open the fuel shut-off valve |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Clogged or damaged injectors - Check fuel injectors and replace if required |
| Faulty fuel injection pump - Change or repair the pump |
| Bad engine compression - Inspect and replace faulty parts |
| Engine stalls during operation |
| Engine is cold - Warm up engine to required temperature |
| Air in fuel lines - Bleed fuel lines |
| Improper fuel injection - Fuel injection settings required |
| Fuel filter is clogged - Service or replace the filter |
| Faulty or dirty injectors - Inspect fuel injectors and replace if necessary |
| Engine starts but then shuts off |
| Unadjusted fuel injection pump timing - Adjust injection timing |
| Fuel filter clogging - Clean the filter element |
| Clogged or damaged injector nozzles - Replace fuel injector nozzles |
| Faulty fuel injection pump - Repair or install a new fuel pump |
| Air cleaner is dirty - Clean or replace the air cleaner element |
| Incorrectly adjusted low idle speed - Test and adjust |
| Fuel injection pump damage - Replace injection pump or repair it |
| Fuel injector nozzles are dirty or defective - Replace fuel injector nozzles |
| Valve out of adjustment - Adjust valve clearance |
| Engine coolant is insufficient - Add the coolant. Check system for leaks |
| Cooling system is clogged or cooling components are defective - Replace faulty parts or service cooling system |
| Insufficient engine oil - Fill up the engine oil |
| Fan belt is damaged or belt tension is incorrect - Adjust correctly or replace the belt |
| Defective thermostat - Install new thermostat |
| Faulty or dirty injectors - Change fuel injectors |
| Fuel injection pressure is incorrect - Correct the pressure settings |
| Air filter is clogged - Install new filter element or replace it |
| Engine oil filter is plugged - Service or change engine oil filter element |
| Engine overloaded - Reduce load or shift to lower gear |
| Incorrect valve clearance - Need to adjust valve clearance |
| Wrong adjustment of low idle speed - Normalize low idle speed |
| Dirt in the hoses or pipes - Clean fuel hoses and pipes |
| Poor engine compression: Leaking or faulty valves - Valves need to be replaced |
| Incorrect setting of fuel injection pump timing - Repair or replace fuel injection pump |
| Fuel injector nozzles are dirty - Service or replace nozzles if required |
| Lack of engine oil - Need to add engine oil |
| Engine is cold - Warm up the engine |
| Main bearings or crankshaft wear - Crankshaft or bearings need to be replaced |
| Defective or broken piston rings - Piston rings replacement required |
| Loose flywheel bolts - Check flywheel bolts and tighten properly |
| Engine consuming too much oil |
| Oil leakage: Damaged seals or gaskets - Worn parts need to be replaced |
| Oil viscosity is incorrect - Use oil of proper viscosity |
| Worn or broken piston rings - Piston rings replacement required |
| Valve stems or guides are damaged - Replace defective valves |
| Pistons or cylinder liners are worn - Inspect pistons and liners, fit new components as necessary |
| Electrical System Troubleshooting |
| Battery won’t charge |
| Bad cell in battery - Battery change required |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Loose or corroded battery terminals and cables - Tighten or service cables and terminals |
| Belt slipping or wrong belt tension adjustment - Change belt or properly adjust belt tension |
| Low battery capacity - Recharge the battery |
| Battery won’t hold charge - Service charging system or replace battery |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Corroded or loose cables and terminals - Service or tighten battery cables and terminals |
| Starter motor is not working |
| Battery capacity is low - Battery needs to be recharged |
| Discharged or worn battery - Replace or charge as required |
| Defective starter motor - Starter should be changed |
| Disconnected or incorrectly connected cables - Need to reconnect cables correctly |
| Transmission Troubleshooting |
| Gear shift is hard |
| Clutch is unadjusted or worn - Adjust clutch or replace if required |
| Gear shift linkage is loose or broken - Replace or repair the shift linkage |
| Bent or worn shift forks - Change the shift forks |
| Defective gearshift mechanism - Replace defective components |
| Transmission oil pressure is low |
| Oil level is low - Add transmission oil as required |
| Transmission fluid filter is plugged (if fitted) - Replace or clean transmission fluid filter |
| Relief valve is faulty - Replace relief valve |
| Transmission is excessively noisy |
| Bearings are worn or broken - Bearings need to be changed |
| Not enough fluid in transmission - Add transmission fluid as required |
| Dirty transmission oil - Fill up with fresh transmission oil |
| Incorrect backlash or gears are defective - Set backlash correctly or change the gears |
| Worn or damaged shift forks - Install new shift forks |
| Seals or gaskets are damaged - Install new components |
| Cracked transmission housing - Housing needs to be replaced |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Improper hydraulic pressure adjustments - Adjust it correctly |
| Main relief valve is faulty or misadjusted - Adjust or change relief valve |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Aeration in hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic fluid pressure too low |
| Not enough hydraulic oil in the system - Add oil to the hydraulic system |
| Hydraulic oil filter is dirty - Change the hydraulic filter element or service if required |
| Hydraulic pump malfunction - Test the pump flow rate and change pump if required |
| Defective or not adjusted hydraulic spool valve - Replace or set properly |
| Broken hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Hydraulic piping leaks - Find leaks in hydraulic system and repair it |
| 3-point hitch won't raise or raises slowly |
| Hydraulic oil level is insufficient - Fill up the hydraulic oil |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic oil filter element is dirty - Service or replace the hydraulic filter |
| Damaged hydraulic oil pump - Check pump flow and change pump if necessary |
| Main relief valve malfunction or incorrect adjustment - Replace or set up the relief valve |
| Hydraulic spool valve is not set properly or defective - Replace or adjust correctly |
| Broken hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Broken or loose suction line - Retighten or change |
| 3-point hitch lowers slowly or won't lower |
| Hydraulic spool valve block is defective or set improper - Adjust properly or replace |
| Broken hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
| Damaged lift arm shaft - Change the shaft |
| Damaged mechanical components of the hitch - Replace worn or faulty hitch components |
| Hitch lowering or lifting is not smoothly |
| Air leaks in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
| Contaminated hydraulic oil - Change hydraulic oil |
| Hydraulic pump is defective - Check the pump capacity and replace pump if required |
| Hydraulic spool valve is not set properly or defective - Adjust correctly or change |
| Hydraulic cylinder is faulty - Inspect cylinder components for wear or damage and change if required |
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| Farm Tractors Technical Specifications |
