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Massey Ferguson 8120 Troubleshooting

Massey Ferguson 8120 Engine Troubleshooting

Engine starts up hard or won't start: Fuel filter element is clogged. Clean the filter element. Air in the fuel lines. Bleed the fuel lines. Damaged or dirty injection nozzles. Inspect nozzles and replace if necessary. Fuel injection pump is not working correctly. Replace or repair injection pump.

Engine stops unexpectedly during operation: Incorrect adjustment of fuel injection pump timing. Adjust fuel injection pump as required. Fuel filter element is dirty. Clean or change the filter. Low coolant temperature. Warm up engine as required.

Engine starts and then shuts off: Dirty fuel filter. Install new filter element. Fuel injection pump is defective. Repair or replace injection pump. Air filter is dirty. Clean air cleaner element.

Engine overheated: Radiator core is dirty or radiator cap is damaged. Clean radiator or install new cap. Insufficient coolant. Fill the cooling system and check components for leaks or other faults. Fan belt is broken or worn. Belt replacement is recommended. Engine oil level is insufficient. Need to add engine oil.

Engine power is too low: Faulty fuel injection nozzles. Test injection nozzles and change if necessary. Fuel lines or hoses clogging. Clean fuel system lines and hoses. Air filter element clogged. Replace air filter element. Leaking cylinder head gasket. Install new cylinder head gasket.

Engine knocking or noise: Coolant temperature is low. Warm up engine as required. Engine oil level low. Fill up the engine oil. Incorrect adjustment of fuel injection pump timing. Adjust fuel injection pump as required. Piston wear or scoring. Replace the pistons as required. Misaligned or defective connecting rod. Need to align or replace the connecting rod.

Engine stalls while idling: Improperly adjusted low idle speed. Correct low idle settings. The valve clearance is not adjusted. Have it adjusted. Fuel injection pump failure. Repair or install new pump.

Insufficient oil pressure: Oil level is low. Fill the crankcase with oil. Oil pump failure. Check and replace if necessary. Dirty oil filter element. Change or clean engine oil filter element.

Massey Ferguson 8120 Transmission Troubleshooting

Transmission noise: Backlash is incorrect or gears are damaged. Change worn gears or adjust backlash correctly. Shift forks are worn or bent. Shift forks need to be changed. Worn or stuck shaft splines. Install a new shaft. Low fluid level. Check and refill the transmission fluid. Bearings are damaged or worn. Change faulty bearings. Transmission oil contamination. Change the oil.

Hard shifts: Rusty or worn gear shift linkage. Lubricate or replace shift linkage. Clutch is faulty or misadjusted. Adjust clutch or change if necessary. Shift forks are bent or worn out. Shift forks need to be replaced. Gearshift mechanism malfunction. Identify and replace failed parts.

Low transmission oil pressure: Low oil level. Need to add transmission oil. Transmission oil filter is dirty (if equipped). Service or change transmission oil filter. Relief valve failure. Replace relief valve as required.

External fluid leaks: Seals or gaskets are broken. Install new components. Transmission oil level is exceeded. Correct the oil volume.

Massey Ferguson 8120 Hydraulic System Troubleshooting

Hydraulic system overheating: Hydraulic fluid type is wrong. Use correct type of hydraulic fluid. Hydraulic oil contamination. Change the oil. Air in hydraulic pipes. Bleed hydraulic pipes. Defective main relief valve. Relief valve replacement required.

Low hydraulic fluid pressure: Insufficient hydraulic oil. Need to add oil. Dirty hydraulic fluid filter element. Change hydraulic filter element or clean if necessary. Leaking hydraulic pipes. Check the system and repair leaks. Incorrect setting hydraulic control valve block. Set correctly. Defective hydraulic pump. Replace or repair hydraulic oil pump. Faulty hydraulic cylinder. Repair or replace hydraulic cylinder.

3-point hitch won't lift or lifts slowly: Faulty hydraulic pump. Change or repair hydraulic fluid pump. Main relief valve is defective. Change relief valve. Hydraulic spool valve is faulty. Repair or change the valve. Defective hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic fluid is insufficient. Fill the system to proper hydraulic fluid level. Dirty hydraulic fluid filter element. Install a new hydraulic filter element. Excessive hitch loading. Reduce hitch load.

Hitch cannot be dropped or dropping is too slow: Defective hydraulic cylinder. Repair or change hydraulic cylinder. Not adjusted hydraulic spool valve. Need to adjust spool valve. Damaged lift arm shaft. Replace the shaft. The hitch has not been adjusted. The three-point hitch must be adjusted.

Hitch jerks when drop or lift: Contaminated hydraulic oil. Change hydraulic oil. Damaged hydraulic pump. Replace or repair hydraulic oil pump. Air in the hydraulic system. Air bleeding. Hydraulic control valve block is damaged. Repair or change the valve. Hydraulic cylinder not working. Install a new hydraulic cylinder or repair it.

Massey Ferguson 8120 Steering Troubleshooting

Excessive free play of steering wheel: Steering column coupling or shaft is extremely worn out. Change faulty part. Steering pump is worn. Repair or change steering pump. Worn or loose steering linkage assembly. Change or repair steering linkage. Faulty or worn hydrostatic steering unit. Inspect and change as required.

Heavy steering: Air lock in hydraulic steering system. Need to bleed air. Steering filter is clogged. Clean or change steering filter. Insufficient steering fluid. Fill up the steering fluid. Worn or defective hydrostatic steering unit. Replace or repair steering unit as required. Faulty steering pump. Install a new hydraulic steering pump. Steering pump control valve is worn or stuck. Service or replace flow control valve. Incorrectly assembled or damaged steering column. Reassemble the steering column correctly or change it. Front tires are worn unevenly. Install new tires. Improper toe-in. Adjust toe-in wheels. Steering cylinder leaks. Change damaged piston rod or worn seal sleeves.

Tractor pulls to right or left: Faulty or worn hydrostatic steering unit. Check and replace as required. Defective steering cylinder. Change or repair hydraulic steering cylinder. Incorrect toe-in. Check toe-in and correct. Loose or worn steering linkage components. Inspect and change as required. Improperly adjusted or defective front hub bearings. Change or adjust bearings correctly. Tire pressure is uneven. Adjust the tire pressure.

Massey Ferguson 8120 Electrical System Troubleshooting

Battery will not charge: Electrical wire connections are corroded or loose. Tighten or service cable connections. Battery terminal clamps are defective. Terminal clamps should be changed. Battery dead cell. Install a new battery. Damaged or loose belt. Adjust belt tension or install a new belt.

Starter cranks slowly: Battery power is low. Battery is drained, recharge it. Battery won’t hold charge. Service charging system or replace battery. Corroded battery terminals or disconnected wires. Check wiring connections and replace or clean terminals.

Starter doesn't crank: Battery is low or faulty. Change or recharge battery. Wiring harness is disconnected or improperly connected. Check wiring harness and connect as required. Battery voltage is low. Recharge the battery. Damaged starter motor. Starter should be replaced.