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Kubota M7950 Troubleshooting

Kubota M7950 Engine Troubleshooting

Engine starts hard or won't start: Fuel filter plugging. Clean or replace the filter. Air in the fuel pipes. Bleed the fuel pipes. Fuel injection nozzles are clogged or faulty. Check and replace nozzles if required. Fuel injection pump is defective. Install a new pump or rebuild.

Engine shuts off while running: Timing of fuel injection pump is incorrect. Set it up as required. Fuel filter element is dirty. Service the filter. Low coolant temperature. Engine is not warmed up to the required temperature.

Engine starts but then stalls: Clogged fuel filter. Replace filter element. Fuel injection pump failure. Replace or repair injection pump. Dirty air filter element. Carry out maintenance on air filter.

Engine overheats: Dirty radiator core or defective radiator cap. Clean radiator or replace cap. Low engine coolant. Refill to the correct level and inspect system for leaks. Fan belt is loose or defective. Replace the fan belt. Low engine oil level. Check oil level and add oil as required.

Engine power is too low: Damaged or dirty injection nozzles. Clean or replace injection nozzles. Dirty fuel hoses or lines. Clean fuel lines and hoses. Restricted intake air. Change air filter element. Cylinder head gasket is defective. Gasket should be replaced.

Abnormal engine noise or knocking: Engine is not preheated. Normalize the temperature by warming up the engine. Low engine oil level. Add oil to the engine crankcase. Timing of fuel injection pump is incorrect. Adjust fuel injection pump as required. Pistons are broken or worn. Install new pistons. Misaligned or faulty connecting rod. Need to replace or align the connecting rod.

Engine stalls at idle: Incorrectly adjusted low idle speed. Correct low idle adjustment. The valve clearance is incorrect. Adjustment procedure required. Fuel injection pump damage. Rebuild or change fuel pump.

Oil pressure is low: Oil level is insufficient. Checking oil level and add if necessary. Worn oil pump. Inspect and change as required. Oil filter clogging. Replace or clean engine oil filter element.

Kubota M7950 Transmission Troubleshooting

Transmission noise: Backlash is incorrect or gears are damaged. Replace defective gears or set backlash properly. Shift forks are bent or worn out. Change defective shift forks. Stuck or worn shaft splines. Shaft need to be replaced. Transmission oil insufficient. Add oil to the transmission housing. Worn or damaged bearings. Faulty bearings should be changed. Transmission oil contamination. Transmission oil change required.

Difficulty shifting gears: Stuck or worn gear shift linkage. Replace or lubricate the shift linkage. Unadjusted or worn clutch. Adjust clutch or change if necessary. Shift forks are bent or worn out. Change defective shift forks. Gearshift mechanism malfunction. Identify and replace failed parts.

Insufficient transmission oil pressure: Low fluid level. Check and refill the transmission fluid. Transmission oil filter element clogging (if equipped). Clean or change transmission oil filter. Relief valve is damaged. Replace the valve.

External fluid leaks: Broken seals or gaskets. Gaskets or seal need to be replaced. Transmission fluid level is high. Correct the fluid level.

Kubota M7950 Hydraulics Troubleshooting

Excessive hydraulic system heat: Improper type of hydraulic oil. Use the proper type of oil. Contaminated hydraulic fluid. Change hydraulic fluid. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve malfunctioning. Install a new relief valve.

Hydraulic fluid pressure too low: Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Clogged hydraulic oil filter element. Service or replace the hydraulic filter. Hydraulic piping is leaking. Check the hydraulic system and fix leaks. Incorrect setting hydraulic control valve. Use the correct adjustment. Damaged hydraulic pump. Repair or replace hydraulic oil pump. Hydraulic cylinder malfunction. Repair or replace hydraulic cylinder.

Hitch not raising or hitch raises slowly: Hydraulic pump is defective. Change or repair hydraulic oil pump. Main relief valve is defective. Install a new relief valve. Faulty hydraulic control valve. Replace or repair the valve. Broken hydraulic cylinder. Repair or change hydraulic cylinder. Insufficient hydraulic fluid. Fill the system to proper hydraulic fluid level. Clogged hydraulic oil filter. Clean or change hydraulic filter. Excessive loading on the hitch. Reduce hitch load.

3-point hitch cannot be lowered or lowering is too slowly: Damaged hydraulic cylinder. Change or repair hydraulic cylinder. Hydraulic control valve is out of adjustment. Need to make adjustment. Hitch cross shaft is damaged. Change the shaft. Hitch is out of adjustment. The hitch must be adjusted.

Hitch jerks when drop or lift: Hydraulic oil contamination. Change the oil. Hydraulic pump malfunction. Install a new hydraulic fluid pump. Air trapped in hydraulic system. Bleed air from system. Damaged hydraulic spool valve. Repair or change the valve. Hydraulic cylinder malfunction. Repair or replace hydraulic cylinder.

Kubota M7950 Steering System Troubleshooting

Excessive free play of steering wheel: Steering column shaft or coupling is worn out. Replace faulty part. Steering pump failure. Check the steering pump and replace if necessary. Steering linkage joints are worn or loose. Replace or repair steering linkage. Hydrostatic steering unit has malfunction or wear. Repair or change the steering unit.

Steering is stiff: Air in steering system. Bleed air. Clogged steering filter. Clean or replace the element. Lack of steering fluid. Need to add steering oil. Defective or worn hydrostatic steering unit. Repair power steering box. Defective hydraulic steering pump. Repair or replace steering pump. Damaged or stuck steering pump control valve. Clean or replace control valve. Incorrectly assembled or damaged steering column. Reassemble the steering column correctly or change it. Uneven tire pressure. Inflate the tires properly. Incorrect toe-in. Check and adjust toe-in. Leaking steering cylinder. Replace scratched piston rod or worn cylinder seals.

Tractor is pulling to right or left: Hydrostatic steering unit has damage or wear. Inspect and change as required. Faulty steering cylinder. Replace or repair hydraulic steering cylinder. Incorrect toe-in. Adjust toe-in properly. Steering linkage components are loose or worn. Repair or change steering linkage. Worn or incorrectly adjusted or worn front wheel bearings. Adjust correctly or change bearings. Front tyres are worn unevenly. Install new tyres.

Kubota M7950 Electrical Troubleshooting

Battery won’t charge: Loose or corroded wire connections. Tighten or clean connections. Electrical terminal connectors are defective. Change terminal connectors. Battery faulty cell. Use a new battery. Loose or worn belt. Replace belt or adjust belt tension.

Starter cranks slowly: Battery voltage is low. Recharge the battery. Battery drains quickly. Service charging system or replace battery. Disconnected cables or faulty battery terminals. Check cable connections and change or clean terminals.

Starter doesn't crank: Battery is low or faulty. Recharge or replace battery. Battery wires are disconnected or incorrectly connected. Check wires and connect correctly. Low battery output voltage. Battery is drained, recharge it. Starter motor is damaged. Repair or replace starter.