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Kubota M8580 Troubleshooting

Kubota M8580 Engine Troubleshooting

Engine difficult to start or will not start: Fuel filter plugged. Service or replace the filter. Air in fuel system. Bleed fuel system. Faulty or dirty injection nozzles. Service or change injection nozzles. Fuel injection pump is not working correctly. Install a new fuel pump or repair.

Engine stalls while running: Improper setting of fuel injection pump timing. Adjust as recommended. Fuel filter element is dirty. Service or replace the filter. Engine not warmed up. Warm up the engine.

Engine starts and then shuts off: Fuel filter plugged. Service or replace the filter. Fuel injection pump is not working correctly. Replace or repair injection pump. Dirty air filter element. Clean or replace the element.

Engine is overheated: Radiator core is dirty or radiator cap is damaged. Clean radiator or install new cap. Engine coolant is insufficient. The cooling system needs to be refilled and checked for faults. Damaged or worn fan belt. If necessary, replace the belt. Engine oil level low. Check and refill engine oil.

Engine lacks power: Fuel injection nozzles are damaged. Install a new kit of correctly balanced nozzles. Dirty fuel hoses or lines. Fuel hoses and lines must be clean. Restricted intake air. Clean or replace element. Cylinder head gasket is defective. Change cylinder head gasket.

Engine noises or knocks: Engine is cold. Warm up to required temperature. Lack of engine oil. Add oil to the engine crankcase. Incorrect adjustment of fuel injection pump timing. Adjust fuel injection pump as required. Pistons are worn or broken. Pistons need to be replaced. Connecting rod is defective or misaligned. Connecting rod needs to be replaced or aligned.

Engine stalls at idle: Incorrect low idle speed adjustment. Correct low idle adjustment. Valve out of adjustment. Need to adjust valve clearance. Fuel injection pump damage. Change or repair the pump.

Insufficient oil pressure: Engine oil insufficient. Checking oil level and add if necessary. Defective oil pump. Repair or replace. Oil filter element clogging. Clean or change engine oil filter.

Kubota M8580 Transmission Troubleshooting

Transmission makes excessive noise: Damaged gears or incorrect backlash. Change worn gears or adjust backlash correctly. Shift forks are bent or worn out. Install new shift forks. Worn or damaged shaft splines. Install a new shaft. Low oil level. Check transmission oil level and add oil as required. Worn or damaged bearings. Faulty bearings should be replaced. Transmission oil is dirty. Change the oil.

Difficulty shifting gears: Gear shift linkage is worn or rusty. Replace or lubricate the shift linkage. Clutch is faulty or misadjusted. Adjust or change the clutch. Shift forks are bent or worn out. Shift forks need to be changed. Worn out parts of the gearshift mechanism. Replace worn parts.

Low transmission fluid pressure: Lack of transmission fluid. Checking transmission fluid level and add if necessary. Clogged transmission fluid filter (if equipped). Clean or change transmission fluid filter. Relief valve malfunction. Replace the valve.

Transmission fluid leaks: Damaged seals or gaskets. Seals and gaskets need to be replaced. Too much fluid in transmission. Excess fluid must be drained.

Kubota M8580 Hydraulic System Troubleshooting

Hydraulic system overheating: Improper hydraulic oil type. The proper type of hydraulic oil must be used. Hydraulic fluid contamination. Change hydraulic fluid. Air in hydraulic lines. Bleed hydraulic lines. Faulty main relief valve. Install a new relief valve.

Hydraulic fluid pressure too low: Insufficient hydraulic oil. Checking hydraulic oil level and add if necessary. Clogged hydraulic oil filter. Service or replace the hydraulic filter. Leaks in hydraulic pipes. Find leaks in the system and fix it. Hydraulic control valve block is set improperly. Set properly. Defective hydraulic pump. Change or repair hydraulic oil pump. Hydraulic cylinder not working. Replace or repair hydraulic cylinder.

Three-point hitch cannot be lifted or lifting is too slow: Hydraulic pump malfunction. Change or repair hydraulic oil pump. Defective main relief valve. Replace relief valve. Hydraulic spool valve block is defective. Change or repair hydraulic valve. Damaged hydraulic cylinder. Install a new hydraulic cylinder or repair it. Hydraulic oil level low. Need to add oil. Hydraulic fluid filter element is clogged. Clean the hydraulic filter element or replace if necessary. Excessive loading on the hitch. The load should be reduced.

Three-point hitch cannot be dropped or dropping is too slow: Hydraulic cylinder not working. Change or repair hydraulic cylinder. Incorrect setting hydraulic control valve. Use the correct adjustment. Lift arm shaft is damaged. Replace the shaft. The three-point hitch is not adjusted. Need to make adjustments.

Hitch lower or lift is jerky: Contaminated hydraulic fluid. Change hydraulic fluid. Hydraulic pump not working. Replace or repair hydraulic oil pump. Air in the hydraulic system. Air bleeding. Defective hydraulic spool valve. Repair or change the valve. Hydraulic cylinder failure. Change or repair hydraulic cylinder.

Kubota M8580 Steering Troubleshooting

Steering wheel has too much free-play: Worn steering column coupling or shaft. Replace defective component. Defective hydraulic steering pump. Repair or replace steering pump. Worn or loose steering linkage assembly. Inspect and replace as required. Power steering control valve has wear or malfunction. Inspect and change as required.

Steering wheel turns hard: Air in steering hydraulic system. Bleed the steering system. Dirty steering filter element. Steering filter need to be replaced. Steering fluid insufficient. Check and refill steering fluid. Power steering control valve has wear or damage. Change or repair steering control valve if required. Hydraulic steering pump is defective. Repair or replace steering pump. Stuck or faulty steering pump control valve. Clean or install new control valve. Worn or incorrectly fitted steering column. Replace the steering column or refit it correctly. Uneven tyre pressure. Inflate the tyres properly. Improper toe-in. Check toe-in and correct. Steering cylinder leaks. Replace worn seal sleeves or damaged piston rod.

Front wheels wander to left or right: Power steering control valve has wear or malfunction. Replace or repair steering control valve as required. Steering cylinder is faulty. Repair or change hydraulic steering cylinder. Improper toe-in. Adjust toe-in properly. Loose or worn steering linkage parts. Replace or repair steering linkage. Improperly adjusted or worn front wheel bearings. Adjust properly or replace bearings. Front tyres are worn unevenly. Install new tyres.

Kubota M8580 Electrical Troubleshooting

Battery will not charge: Electrical cable connections are corroded or loose. Tighten or service connections. Electrical terminal connectors are defective. Change terminal connectors. Battery is defective. Replace the battery. Belt is damaged or loose. Adjust belt tension or change the belt.

Starter cranks slow: Low battery voltage. Recharge the battery. Battery won’t hold charge. Service or change the battery. Bad battery terminals or disconnected wiring. Check battery wires and service or replace terminals.

Starter motor won't turn: Battery is drained or defective. Charge or change the battery. Wiring harness is disconnected or improperly connected. Check wiring harness and connect as required. Battery capacity is low. Charge the battery. Starter motor is damaged. Repair or install a new starter.