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New Holland TN75A Troubleshooting

New Holland TN75A Engine Troubleshooting

Engine hard to start or will not start: Fuel filter plugging. Clean the filter or install new filter element. Air in fuel tank. Bleed fuel tank. Damaged or dirty injection nozzles. Check and replace nozzles if required. Faulty fuel injection pump. Replace injection pump or repair it.

Engine stalls after running: Fuel injection pump timing is not adjusted. Adjust as recommended. Dirty fuel filter. Clean the filter element. Engine is not fully warmed up. Warm up the engine.

Diesel starts and suddenly stops: Fuel filter plugging. Install new filter element. Fuel injection pump is damaged. Replace or repair injection pump. Restricted intake air. Replace air filter element.

Engine overheating: Dirty radiator fins or faulty radiator cap. Clean radiator or install new cap. Engine coolant is insufficient. Top up coolant fluid and check system for leaks. Fan belt is worn or faulty. Replace the fan belt. Engine oil level is low. Fill the crankcase with engine oil.

Engine power loss: Fuel injection nozzles are faulty or clogged. Change fuel injection nozzles. Restricted fuel lines or hoses. Fuel hoses and lines must be clean. Plugged air cleaner. Clean air cleaner element. Cylinder head gasket is damaged. Install a new gasket.

Engine noise or knocking: Engine not warmed up. Engine is not warmed up to the required temperature. Engine oil insufficient. Check and refill engine oil. Incorrect adjustment of fuel injection pump timing. Set the fuel pump timing correctly. Broken or worn pistons. Have pistons replaced. Connecting rod is not aligned or worn. Need to align or replace the connecting rod.

Engine stops when idling: Incorrectly set low idle speed. Need to adjust idle speed. Valve clearance is out of adjustment. Adjust valve clearance according to specifications. Fuel injection pump malfunction. Install a new pump or rebuild.

Oil pressure is insufficient: Not enough oil in the engine. Add oil as required. Defective oil pump. Install a new pump. Oil filter element clogged. Change or service engine oil filter.

New Holland TN75A Transmission Troubleshooting

Transmission noises: Backlash is incorrect or gears are damaged. Replace gears or adjust backlash correctly. Shift forks are worn or bent. Shift forks need to be replaced. Shaft splines are worn or damaged. Change defective shaft. Lack of transmission oil supply. Check transmission oil level and add oil as required. Worn or damaged bearings. Install new bearings. Transmission fluid is contaminated. Transmission fluid change required.

Difficult to shift gears: Gear shift linkage is rusty or worn. Install new shift linkage. Clutch is worn or not adjusted. Adjust or change the clutch. Worn or bent gear shift forks. Change the shift forks. Gearshift mechanism is damaged. Replace or repair the mechanism.

Low transmission fluid pressure: Transmission oil insufficient. Add oil to the transmission housing. Dirty transmission fluid filter (if fitted). Replace or service transmission fluid filter. Stuck relief valve. Replace valve as required.

Transmission fluid leakage: Damaged gaskets or seals. Replace worn seal or gaskets. Transmission oil level is exceeded. Correct the oil volume.

New Holland TN75A Hydraulics Troubleshooting

Hydraulic system overheats: Hydraulic oil type is wrong. Correct type of oil must be used. Contaminated hydraulic fluid. Change hydraulic fluid. Air in hydraulic pipes. Bleed hydraulic pipes. Defective main relief valve. Relief valve replacement required.

Hydraulic fluid pressure is insufficient: Low hydraulic oil level. Fill the system to proper hydraulic oil level. Dirty hydraulic fluid filter. Hydraulic filter maintenance required. Leaks in hydraulic lines. Identify leaks in the system and repair it. Incorrect setting hydraulic spool valve. Use the correct setting. Hydraulic pump not working. Install a new hydraulic oil pump. Hydraulic cylinder not working. Install a new hydraulic cylinder or repair it.

Hitch does not raise or raises very slowly: Faulty hydraulic pump. Install a new hydraulic fluid pump. Main relief valve failure. Install a new relief valve. Hydraulic spool valve block is faulty. Repair or replace the valve. Hydraulic cylinder is faulty. Install a new hydraulic cylinder or repair it. Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Hydraulic fluid filter element is clogged. Service or replace the hydraulic filter. Excessive load on hitch. Reduce loading.

3-point hitch won't lower or lowers slowly: Defective hydraulic cylinder. Repair or change hydraulic cylinder. Incorrect setting hydraulic spool valve. Use the correct setting. Hitch rock shaft is worn. Change the shaft. Three-point hitch has not been adjusted. The 3-point hitch must be adjusted.

Hitch lower or lift is jerky: Hydraulic fluid contamination. Change hydraulic fluid. Defective hydraulic pump. Replace or repair hydraulic oil pump. Air in hydraulic lines. Bleed hydraulic lines. Defective hydraulic spool valve block. Install a new hydraulic valve or repair it. Hydraulic cylinder is faulty. Replace or repair hydraulic cylinder.

New Holland TN75A Steering System Troubleshooting

Excessive free play of steering wheel: Steering column coupling or shaft is extremely worn out. Change faulty part. Faulty steering pump. Repair or replace steering pump. Steering linkage components are loose or worn. Check and replace as required. Hydrostatic steering unit has wear or malfunction. Check and replace as required.

Difficult steering: Air in steering hydraulic system. Air-bleed steering system. Steering filter element is clogged. Service or replace the steering filter. Steering fluid insufficient. Check and refill steering fluid. Hydrostatic steering unit is defective or worn. Check and replace as required. Hydraulic steering pump is defective. Repair or change steering pump. Stuck or faulty steering pump control valve. Replace or service 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. Steering cylinder is leaking. Replace worn seal sleeves or damaged piston rod.

Tractor is pulling to left or right: Defective or worn hydrostatic steering unit. Inspect and change as required. Steering cylinder is worn. Repair or change hydraulic steering cylinder. Not adjusted toe-in. Adjust toe-in properly. Worn or loose steering linkage assembly. Repair or change steering linkage. Front wheel bearings are defective or improperly adjusted. Adjust properly or change bearings. Uneven wear on front tyres. Replace the tyres.

New Holland TN75A Electrical Troubleshooting

Battery cannot be charged: Wiring connections are loose or corroded. Tighten or clean electrical wiring connections. Battery terminal clamps are defective. Install new terminal clamps. Bad cell in battery. Use a new battery. Belt is worn or loose. Adjust belt tension or change the belt.

Starter motor turns slow: Low battery output voltage. Charge the battery. Battery is draining quickly. Service charging system or change battery. Corroded battery terminals or disconnected wires. Check cables and service or change terminals.

Starter does not work: Battery is discharged or defective. Recharge or replace battery. Wiring is improperly connected or disconnected. Check wiring and connect properly. Battery power is low. Charge the battery. Damaged starter motor. Repair or change starter.