Specifications, Service and Repair of Farm and Lawn Tractors

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Massey Ferguson Super 90 Troubleshooting

Massey Ferguson Super 90 Diesel Engine Troubleshooting

Engine starts up hard or won't start: Fuel filter plugging. Change filter element. Air in fuel tank. Bleed fuel tank. Defective or clogged injection nozzle. Inspect nozzles and replace if necessary. Defective fuel injection pump. Repair or change injection pump.

Engine stalls after running: Incorrect adjustment of fuel injection pump timing. Adjust fuel injection pump as required. Dirty fuel filter. Replace filter element. Engine is not preheated. Warm up engine as required.

Engine starts but stops suddenly: Fuel filter element clogging. Replace the filter element. Fuel injection pump is broken. Change or repair the pump. Air filter element clogged. Clean air cleaner element.

Engine overheated: Dirty radiator core or defective radiator cap. Clean radiator or change cap. Lack of engine coolant. Top up coolant fluid and check system for leaks. Fan belt slipping or worn. Change as required. Low engine oil level. Need to add engine oil.

Engine power is reduced: Faulty or dirty injection nozzles. Inspect nozzles and replace if necessary. Fuel lines or hoses are clogged. Fuel hoses and lines must be clean. Restricted intake air. Clean or change. Cylinder head gasket is damaged. Install new cylinder head gasket.

Abnormal engine knocking or noise: Engine is not fully warmed up. Warm up the engine. Lack of engine oil. Check oil level and add oil as required. Improper setting of fuel injection pump timing. Adjust as recommended. Pistons are worn or broken. Replace the pistons. Connecting rod failure or misalignment. Connecting rod needs to be aligned or changed.

Engine stops at low idle speed: Incorrectly set low idle speed. Correct the settings. The valve clearance is incorrect. Check and adjust. Fuel injection pump malfunctioning. Change or repair the pump.

Oil pressure is insufficient: Low oil level. Fill the crankcase with oil. Oil pump malfunction. Inspect and change as required. Clogged oil filter element. Change or service engine oil filter.

Massey Ferguson Super 90 Transmission Troubleshooting

Excessive transmission noise: Improper backlash or worn gears. Change the gears or set backlash properly. Damaged or worn gear shift forks. Change defective shift forks. Worn or damaged shaft splines. Replace the shaft. Low oil level. Fill the transmission housing to proper oil level. Worn or cracked bearings. Faulty bearings should be replaced. Transmission oil contamination. Transmission oil change required.

Gears are hard to shift: Rusty or worn gear shift linkage. Change or lubricate shift linkage. Worn or improperly adjusted clutch. Adjust clutch or replace if required. Damaged or worn gear shift forks. Shift forks need to be replaced. Worn out parts of the gearshift mechanism. Replace worn parts.

Transmission oil pressure is low: Transmission oil insufficient. Check transmission oil level and add oil as required. Plugged transmission oil filter (if equipped). Clean or change transmission oil filter. Relief valve failure. Replace relief valve.

External fluid leaks: Seals or gaskets are broken. Install new gaskets or seal. High transmission oil level. Correct the oil level.

Massey Ferguson Super 90 Hydraulic System Troubleshooting

Hydraulics overheating: Improper type of hydraulic oil. Use the proper type of oil. Hydraulic oil is contaminated. Fill up with fresh hydraulic oil. There is air in the hydraulic system. Bleed hydraulic system. Defective main relief valve. Replace relief valve.

Hydraulic oil pressure is insufficient: Hydraulic fluid is insufficient. Fill up the hydraulic fluid. Dirty hydraulic fluid filter element. Clean or replace the hydraulic filter. Leaking hydraulic pipes. Identify leaks in the system and repair it. Incorrect adjusted hydraulic spool valve. Adjust the spool valve correctly. Hydraulic pump failure. Install a new hydraulic fluid pump. Hydraulic cylinder not working. Repair or replace hydraulic cylinder.

Hitch does not raise or raises very slowly: Hydraulic pump failure. Replace or repair hydraulic fluid pump. Damaged main relief valve. Install a new relief valve. Faulty hydraulic spool valve. Replace or repair the valve. Faulty hydraulic cylinder. Install a new hydraulic cylinder or repair it. Hydraulic oil level low. Fill the system to proper hydraulic oil level. Clogged hydraulic fluid filter element. Service the hydraulic filter or change if required. Excessive load on hitch. Reduce the load is required.

3-point hitch cannot be lowered or lowering is too slowly: Hydraulic cylinder not working. Replace or repair hydraulic cylinder. Hydraulic spool valve block is not adjusted properly. The spool valve should be properly adjusted. Hitch cross shaft is damaged. Replace the shaft. Hitch is out of adjustment. Adjust the 3-point hitch.

Hitch lifting or lowering is jerky: Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Hydraulic pump malfunction. Replace or repair hydraulic fluid pump. Air in the hydraulic system. Air bleeding. Faulty hydraulic spool valve. Install a new valve or repair it. Broken hydraulic cylinder. Replace or repair hydraulic cylinder.

Massey Ferguson Super 90 Steering Troubleshooting

Excessive free play of steering wheel: Steering column coupling or shaft is extremely worn out. Change faulty part. Steering pump not working. Repair or replace steering pump. Worn or loose steering linkage joints. Repair or replace steering linkage. Steering control valve has wear or damage. Inspect and change as required. Steering box parts are faulty. Repair power steering box.

Stiff steering: Air lock in hydraulic steering system. Bleed air. Steering filter is dirty. Service steering filter. Insufficient steering fluid. Fill up the steering fluid. Steering control valve has wear or damage. Check and replace as required. Steering box parts are faulty. Replace defective parts of power steering box. Steering pump is worn. Replace or repair steering pump. Steering pump control valve is worn or stuck. Change or flush control valve. Worn or incorrectly fitted steering column. Replace the steering column or refit it correctly. Uneven tire pressure. Inflate the tires properly. Not adjusted toe-in. Adjust toe-in wheels.

Tractor is pulling to left or right: Steering box parts have excessive wear. Defective parts of power steering box must be replaced. Defective or worn steering control valve. Change or repair steering control valve if required. Incorrect toe-in. Adjust toe-in properly. Loose or worn steering linkage components. Repair or replace steering linkage. Front wheel bearings are worn or incorrectly adjusted. Adjust correctly or replace bearings. Tire pressure uneven. Inflate the tires correctly.

Massey Ferguson Super 90 Electrical Troubleshooting

Battery does not charge: Electrical cable connections are loose or corroded. Clean or tighten wiring connections. Battery terminal clamps are faulty. Install new terminal clamps. Battery bad cell. Battery replacement required. Belt is loose or defective. Belt needs to be adjusted or replaced.

Starter turning slow: Low battery output voltage. Charge the battery. Battery won’t hold charge. Service battery or replace it. Bad battery terminals or disconnected wiring. Connect wires properly or change terminals.

Starter does not work: Battery is drained or worn. Battery needs to be recharged or replaced. Wiring is incorrectly connected or disconnected. Inspect wiring and connect correctly. Low battery output voltage. Battery is drained, recharge it. Defective starter motor. Repair or change starter.

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