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Massey Ferguson 393 Troubleshooting

Massey Ferguson 393 Engine Troubleshooting

Engine hard to start or won't start: Fuel filter plugged. Filter maintenance required. Air in the fuel lines. Bleed the fuel lines. Defective injection nozzle. If necessary, replace with a new nozzle. Fuel injection pump malfunction. Replace or repair injection pump.

Diesel shuts off while driving: Fuel injection pump timing is wrong. Adjust according to specifications. Fuel filter plugged. Filter maintenance required. Low coolant temperature. Warm up engine as required.

Diesel starts but stalls immediately: Fuel filter element is dirty. Clean or replace the filter. Fuel injection pump is not operating properly. Rebuild or change fuel pump. Dirty air filter element. Install new air filter element.

Engine is overheated: Dirty radiator fins or faulty radiator cap. Install new cap or clean radiator. Coolant level is low. The cooling system needs to be refilled and checked for faults. Fan belt slipping or worn. Belt change is required. Insufficient engine oil. Check oil level and add oil as required.

Loss of engine power: Fuel injection nozzles are faulty or clogged. Replace injection nozzles. Fuel hoses or lines are dirty. Fuel lines and hoses need to be cleaned. Dirty air filter. Air filter maintenance required. Cylinder-head gasket is leaking. Replace the gasket as required.

Abnormal engine knocking or noise: Engine not warmed up. Warm up engine as required. Engine oil level low. Fill the crankcase with engine oil. Improper setting of fuel injection pump timing. Adjust as recommended. Piston wear or scoring. Replace the pistons as required. Misaligned or defective connecting rod. Replace or align connecting rod.

Engine stops when idling: Incorrectly adjusted low idle speed. Adjust low idle speed. Valve clearance is out of adjustment. Have it adjusted. Faulty fuel injection pump. Rebuild or replace pump.

Oil pressure is insufficient: Oil level is insufficient. Need to add oil. Oil pump failure. Repair or replace. Oil filter element is dirty. Clean or change engine oil filter.

Massey Ferguson 393 Transmission Troubleshooting

Transmission noise: Worn gears or incorrect backlash. Change the gears or set backlash properly. Worn or damaged gear shift forks. Change defective shift forks. Worn or damaged shaft splines. Replace the shaft. Insufficient transmission fluid. Check and refill the transmission fluid. Worn or damaged bearings. Install new bearings. Transmission oil is contaminated. Change the oil.

Difficult to shift gears: Gear shift linkage is worn or rusty. Change or lubricate shift linkage. Worn or unadjusted clutch. Clutch replacement or adjustment required. Worn or bent gear shift forks. Shift forks need to be replaced. Gearshift mechanism malfunction. Identify and replace failed parts.

Lack of transmission oil pressure: Transmission fluid level is low. Add fluid to the transmission housing. Transmission fluid filter element clogging (if equipped). Service or change transmission fluid filter. Relief valve malfunction. Replace relief valve as required.

External fluid leaks: Seals or gaskets are broken. Gaskets or seal replacement required. High transmission fluid level. Drain the excess fluid.

Massey Ferguson 393 Hydraulics Troubleshooting

Hydraulic system overheated: Incorrect type of hydraulic fluid. Use the correct type of fluid. Dirty hydraulic fluid. The fluid must be changed. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve is defective. Replace relief valve.

Hydraulic fluid pressure is low: Hydraulic oil level low. Check and refill the hydraulic oil. Hydraulic oil filter element is clogged. Change hydraulic filter element or clean if necessary. Leaking hydraulic lines. Check the system and repair leaks. Hydraulic control valve block is not set properly. Use the proper setting. Hydraulic pump is defective. Replace or repair hydraulic oil pump. Damaged hydraulic cylinder. Change or repair hydraulic cylinder.

Three-point hitch cannot be lifted or lifting is too slow: Damaged hydraulic pump. Replace or repair hydraulic oil pump. Main relief valve malfunctioning. Relief valve need to be replaced. Hydraulic control valve is defective. Repair or change the valve. Defective hydraulic cylinder. Repair or replace hydraulic cylinder. Hydraulic oil is insufficient. Check and refill the hydraulic oil. Clogged hydraulic fluid filter element. Clean or change hydraulic filter. Excessive loading on the hitch. Reduce loading.

Three-point hitch cannot be dropped or dropping is too slow: Hydraulic cylinder failure. Change or repair hydraulic cylinder. Incorrect setting hydraulic control valve block. Set correctly. Worn hitch cross shaft. Replace the shaft. The three-point hitch is not adjusted. Adjust the hitch.

Hitch lowering or lifting is jerky: Dirty hydraulic fluid. The fluid must be changed. Hydraulic pump failure. Change or repair hydraulic fluid pump. Air in hydraulic pipes. Bleed hydraulic pipes. Hydraulic spool valve block is faulty. Install a new hydraulic valve or repair it. Hydraulic cylinder not working. Install a new hydraulic cylinder or repair it.

Massey Ferguson 393 Steering Troubleshooting

Steering wheel has too much free-play: Worn steering column coupling or shaft. Change defective component. Worn steering pump. Install a new steering pump. Steering linkage components are loose or worn. Change or repair steering linkage. Hydrostatic steering unit has damage or wear. Replace or repair steering unit as required.

Steering is hard: Air in steering hydraulic system. Bleed the system of air. Steering filter is plugged. Clean or replace filter element. Steering fluid insufficient. Check and refill steering fluid. Hydrostatic steering unit is defective or worn. Inspect and change as required. Worn steering pump. Install a new hydraulic steering pump. Pump flow control valve is damaged or stuck. Replace or clean flow control valve. Incorrectly assembled or damaged steering column. Reassemble the steering column correctly or change it. Uneven wear on front tires. Replace the tires. Improper toe-in. Check toe-in and correct. Leaking steering cylinder. Damaged cylinder seals or worn piston rod.

Tractor is pulling to right or left: Worn or damaged hydrostatic steering unit. Repair or replace the steering unit. Steering cylinder malfunction. Change or repair hydraulic steering cylinder. Incorrect toe-in. Adjust toe-in wheels. Steering linkage assembly is worn or loose. Check and replace as required. Defective or improperly adjusted front wheel bearings. Replace or adjust the bearings correctly. Tire pressure uneven. Inflate the tires correctly.

Massey Ferguson 393 Electrical Troubleshooting

Battery will not charge: Corroded or loose electrical wire connections. Tighten or service connections. Battery terminal clamps are faulty. Install new terminal clamps. Battery faulty cell. Install a new battery. Loose or defective belt. Belt needs to be adjusted or replaced.

Starter motor turns slow: Low battery voltage. Charge the battery. Battery does not hold charge. Service battery or change it. Terminals are faulty or battery cables are disconnected. Check wiring connections and replace or clean terminals.

Starter motor won't turn: Battery is drained or worn. Recharge or change battery. Battery cables are disconnected or improperly connected. Inspect cables and connect properly. Low battery power. Battery needs to be recharged. Starter motor failure. Replace or repair starter.