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New Holland TN75S Troubleshooting

New Holland TN75S Engine Troubleshooting

Engine difficult to start or won't start: Clogged fuel filter. Change the filter element. Air in fuel system. Bleed fuel system. Clogged or burnt injection nozzle. Install a new kit of correctly balanced nozzles. Fuel injection pump is broken. Change or repair the pump.

Engine shuts off suddenly while running: Timing of fuel injection pump is incorrect. Check the fuel injection pump timing adjustment. Fuel filter plugging. Replace the filter element. Engine is not warmed up to the required temperature. Warm up to required temperature.

Diesel starts but then stops: Fuel filter element is dirty. Clean the filter or install new filter element. Fuel injection pump is faulty. Change pump or rebuild it. Dirty air filter element. Replace air filter element.

Engine overheating: Dirty radiator fins or defective radiator cap. Clean radiator or replace cap. Engine has a lack of coolant. Add coolant and check the components of cooling system. Fan belt is loose or defective. The fan belt needs to be replaced. Engine oil level low. Fill up the engine oil.

Lack of engine power: Clogged or burnt injection nozzle. Change fuel injection nozzles. Clogged fuel hoses or lines. Clean fuel system lines and hoses. Air filter is clogged. Clean or change the filter. Cylinder-head gasket is broken. Replace the gasket as required.

Engine knocks or noises: Engine is cold. Engine is not warmed up to the required temperature. Engine oil level low. Fill up the oil to required level. Fuel injection pump timing is wrong. Set up as recommended. Pistons are worn or scored. Have pistons replaced. Connecting rod is not aligned or worn. Connecting rod needs to be aligned or changed.

Engine stalling at idle: Incorrect low idle setting. Correct low idle settings. Incorrect valve clearance. Adjustment procedure required. Fuel injection pump is broken. Repair or replace injection pump.

Oil pressure is low: Low crankcase oil level. Check and refill the oil. Oil pump failure. Install a new pump. Clogged oil filter element. Clean or change engine oil filter.

New Holland TN75S Transmission Troubleshooting

Transmission noises: Gears are defective or backlash is improper. Replace defective gears or set backlash properly. Worn or bent gear shift forks. Install new shift forks. Worn or damaged shaft splines. Change the shaft. Insufficient transmission oil. Need to add transmission oil. Worn or damaged bearings. Bearings need to be changed. Transmission fluid contamination. Fill up with fresh transmission fluid.

Difficulty shifting gears: Stuck or worn gear shift linkage. Install a new gear shift linkage. Clutch is out of adjustment or defective. Clutch replacement or adjustment required. Worn or damaged gear shift forks. Replace defective shift forks. Gearshift mechanism malfunction. Identify and replace failed parts.

Insufficient transmission fluid pressure: Insufficient transmission oil. Check transmission oil level and add oil as required. Transmission oil filter is clogged (if fitted). Clean or change transmission oil filter. Defective relief valve. Install a new valve.

Transmission oil leaks: Damaged seals or gaskets. Replace worn gaskets or seal. Transmission fluid level is exceeded. Excess fluid must be drained.

New Holland TN75S Hydraulic System Troubleshooting

Hydraulic system is too hot: Hydraulic fluid type is wrong. Use correct type of hydraulic fluid. Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve is defective. Install a new relief valve.

Low hydraulic system pressure: Hydraulic fluid level low. Add fluid as required. Hydraulic oil filter is clogged. Hydraulic filter maintenance required. Leaking hydraulic pipes. Inspect hydraulic system for leaks and repair it. Not adjusted hydraulic spool valve. Need to adjust spool valve. Damaged hydraulic pump. Replace or repair hydraulic oil pump. Hydraulic cylinder failure. Repair or replace hydraulic cylinder.

Hitch not raising or hitch raises slowly: Hydraulic pump not working. Replace or repair hydraulic oil pump. Main relief valve is defective. Relief valve replacement required. Defective hydraulic spool valve block. Repair or change the valve. Hydraulic cylinder failure. Repair or change hydraulic cylinder. Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Clogged hydraulic oil filter. Hydraulic filter maintenance required. Excessive load on hitch. Load needs to be reduced.

Hitch not lowering or hitch lowers slowly: Hydraulic cylinder not working. Replace or repair hydraulic cylinder. Incorrect adjusted hydraulic spool valve. Adjust the spool valve correctly. Lift arm shaft is damaged. Replace the shaft. Misadjusted hitch. Adjust the hitch.

Jerky lowering or lifting of the hitch: Dirty hydraulic fluid. The fluid must be changed. Hydraulic pump not working. Replace or repair hydraulic fluid pump. There is air in the hydraulic system. Bleed hydraulic system. Hydraulic spool valve is defective. Install a new hydraulic valve or repair it. Hydraulic cylinder not working. Change or repair hydraulic cylinder.

New Holland TN75S Steering Troubleshooting

Steering wheel has too much free-play: Steering column shaft or coupling is worn out. Change defective part. Steering pump malfunction. Repair or change steering pump. Steering linkage parts are loose or worn. Replace or repair steering linkage. Hydrostatic steering unit is worn or defective. Inspect and change as required.

Hard Steering: Air in steering hydraulic system. Bleed the system of air. Steering filter clogging. Change steering filter element. Not enough steering oil. Check oil level and add steering oil as required. Faulty or worn hydrostatic steering unit. Change or repair steering unit if required. Defective hydraulic steering pump. Repair or replace steering pump. Steering pump control valve is faulty or stuck. Service or change control valve. Defective or incorrectly mounted steering column. Change steering column or mount correctly. Uneven tyre pressure. Inflate the tyres properly. Improper toe-in. Check toe-in and correct. Steering cylinder is leaking. Change damaged piston rod or worn seal sleeves.

Tractor pulls to left or right: Hydrostatic steering unit has malfunction or wear. Replace or repair steering unit as required. Steering cylinder malfunction. Replace or repair steering cylinder. Incorrect toe-in. Adjust toe-in wheels. Worn or loose steering linkage joints. Inspect and replace as required. Improperly adjusted or defective front wheel bearings. Change or adjust the bearings properly. Front tires are worn unevenly. Install new tires.

New Holland TN75S Electrical System Troubleshooting

Battery won’t charge: Electrical wire connections are loose or corroded. Tighten or service cable connections. Electrical terminal connectors are faulty. Install new terminal connectors. Battery is defective. Use a new battery. Defective or loose belt. Adjust belt tension or replace belt.

Starter turns slow: Low battery power. Charge the battery. Battery is not holding charge. Service battery or replace it. Bad terminals or disconnected battery cables. Check cable connections and replace or service terminals.

Starter is not working: Battery is drained or defective. Replace or charge as required. Wiring is improperly connected or disconnected. Check wiring and connect properly. Battery power is low. Charge the battery. Starter motor is defective. Repair or install a new starter.