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New Holland TN75D Troubleshooting

New Holland TN75D Engine Troubleshooting

Engine starts up hard or will not start: Dirty fuel filter. Change filter element. Air trapped in fuel system. Bleed air. Clogged or defective injection nozzles. If necessary, replace with a new nozzle. Fuel injection pump failure. Repair or install new pump.

Engine stops suddenly during operation: Fuel injection pump timing is wrong. Adjust fuel injection pump as required. Fuel filter plugged. Replace the filter element. Engine is not fully warmed up. Warm up the engine.

Engine starts and stalls suddenly: Fuel filter element is clogged. Clean the filter element. Fuel injection pump failure. Replacement or repair required. Clogged air filter. Change air filter element.

Engine overheats: Damaged radiator cap or dirty radiator core. Replace cap or clean radiator. Engine has a lack of coolant. Add coolant and check the components of cooling system. Fan belt is loose or defective. Install new fan belt. Engine oil level low. Fill up the engine oil.

Reduced engine power: Dirty or damaged injection nozzles. Test injection nozzles and change if necessary. Fuel hoses or lines are clogged. Fuel hoses and lines must be clean. Plugged air cleaner. Change air filter element. Cylinder head gasket is damaged. Change cylinder head gasket.

Engine noise or knocking: Engine not warmed up. Warm up to required temperature. Engine oil insufficient. Check and refill engine oil. Improper fuel injection timing. Use the correct fuel injection pump timing adjustment. Pistons are scored or worn. Have pistons replaced. Connecting rod is misaligned or defective. Connecting rod needs to be aligned or changed.

Engine stops while idling: Too low idle RPM. Test and adjust. Valve clearance is out of adjustment. Correct valve clearance. Fuel injection pump failure. Change or repair the pump.

Low oil pressure: Oil level is insufficient. Fill crankcase to proper oil level. Oil pump is worn or damaged. Repair or change. Clogged oil filter element. Replace or service engine oil filter.

New Holland TN75D Transmission Troubleshooting

Transmission is making noise: Gears are defective or backlash is improper. Install new gears and adjust backlash properly. Shift forks are worn or bent. Install new shift forks. Shaft splines are damaged or worn. Replace defective shaft. Insufficient transmission fluid. Need to add transmission fluid. Bearings are cracked or worn. Change faulty bearings. Transmission fluid is dirty. Fill up with fresh transmission fluid.

Gear shift is hard: Stuck or worn gear shift linkage. Lubricate or replace shift linkage. Clutch is out of adjustment or defective. Adjust or install new clutch. Damaged or worn gear shift forks. Shift forks need to be changed. Worn parts of the gear shifting mechanism. Change worn parts.

Transmission oil pressure is low: Transmission fluid insufficient. Need to add transmission fluid. Transmission oil filter is dirty (if equipped). Clean or replace the transmission filter. Defective relief valve. Install a new valve.

Transmission fluid leakage: Damaged seals or gaskets. Gaskets or seal need to be replaced. High transmission oil level. Correct the oil level.

New Holland TN75D Hydraulics Troubleshooting

Hydraulic system is overheated: Hydraulic fluid type is wrong. Use correct type of hydraulic fluid. Hydraulic oil is dirty. Hydraulic oil change required. Air in hydraulic lines. Bleed hydraulic lines. Main relief valve is faulty. Relief valve replacement required.

Hydraulic fluid pressure is low: Insufficient hydraulic oil. Checking hydraulic oil level and add if necessary. Dirty hydraulic fluid filter. Clean or change hydraulic filter. Leaking hydraulic lines. Check the hydraulic system and fix leaks. Incorrect adjusted hydraulic control valve. Adjust correctly. Damaged hydraulic pump. Replace or repair hydraulic oil pump. Broken hydraulic cylinder. Repair or change hydraulic cylinder.

Hitch does not raise or raises very slowly: Hydraulic pump is defective. Repair or replace hydraulic fluid pump. Main relief valve malfunctioning. Relief valve need to be replaced. Faulty hydraulic control valve. Repair or replace the valve. Defective hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic oil level low. Checking hydraulic oil level and add if necessary. Hydraulic oil filter element is clogged. Change hydraulic filter element or clean if necessary. Excessive hitch loading. Load needs to be reduced.

3-point hitch won't lower or lowers slowly: Damaged hydraulic cylinder. Replace or repair hydraulic cylinder. Incorrect adjusted hydraulic control valve. Adjust correctly. Worn hitch cross shaft. Change the shaft. Hitch is out of adjustment. Adjustment is required.

Hitch lower or lift is jerky: Dirty hydraulic oil. The oil must be changed. Hydraulic pump not working. Install a new hydraulic fluid pump. Air in the hydraulic system. Air bleeding. Hydraulic spool valve is damaged. Repair or replace hydraulic valve. Faulty hydraulic cylinder. Repair or replace hydraulic cylinder.

New Holland TN75D Steering System Troubleshooting

Excessive play in steering: Steering column shaft or coupling has maximum wear. Change faulty component. Hydraulic steering pump is defective. Install a new hydraulic steering pump. Loose or worn steering linkage parts. Inspect and change as required. Hydrostatic steering unit has malfunction or wear. Replace or repair steering unit as required.

Steering is difficult: Air trapped inside steering system. Need to bleed air. Dirty steering filter element. Service steering filter. Steering oil level is low. Fill up steering oil to required level. Hydrostatic steering unit has malfunction or wear. Repair or replace the steering unit. Damaged hydraulic steering pump. Replace or repair steering pump. Stuck or worn pump flow control valve. Service or change 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. Check and adjust toe-in. Steering cylinder leaks. Replace damaged piston seals or worn piston rod.

Front wheels wander to left or right: Faulty or worn hydrostatic steering unit. Check and replace as required. Steering cylinder failure. Replace or repair steering cylinder. Improper toe-in. Check and adjust toe-in. Worn or loose steering linkage joints. Change or repair steering linkage. Improperly adjusted or worn front wheel bearings. Adjust correctly or install new bearings. Uneven tire pressure. Inflate the tires properly.

New Holland TN75D Electrical System Troubleshooting

Battery will not charge: Corroded or loose cable connections. Clean or tighten connections. Faulty electrical terminal connectors. Install new terminal connectors. Battery faulty cell. Replace the battery. Belt is loose or defective. Belt needs to be adjusted or replaced.

Starter cranks slow: Battery capacity is low. Battery is drained, charge it. Battery is draining quickly. Battery needs to be serviced or replaced. Battery cables are disconnected or terminals are faulty. Check wire connections and change or service terminals.

Starter motor won't turn: Battery is discharged or worn. Battery needs to be recharged or replaced. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery voltage. Low battery charging, charge as required. Faulty starter motor. Starter should be changed.