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New Holland TD90D Troubleshooting

New Holland TD90D Engine Troubleshooting

Engine starts up hard or won't start: Fuel filter plugging. Install new filter element. Air in the fuel system. Air bleeding. Fuel injection nozzles are faulty or clogged. Check injection nozzles and replace if required. Damaged fuel injection pump. Replace or rebuild injection pump.

Engine shuts off suddenly while running: Fuel injection pump timing is wrong. Adjust according to specifications. Clogged fuel filter. Service the filter. Engine is not warmed up to the required temperature. Engine is not warmed up to the required temperature.

Engine starts and stops suddenly: Fuel filter element clogging. Clean the filter or install new filter element. Fuel injection pump is not working correctly. Install a new pump or rebuild. Air filter is clogged. Clean or change the filter.

Engine overheated: Dirty radiator core or defective radiator cap. Install new cap or clean radiator. Lack of coolant in cooling system. Top up coolant fluid and check system for leaks. Fan belt is broken or worn. Replace as required. Insufficient engine oil. Fill the crankcase with engine oil.

Engine power is reduced: Defective or clogged injection nozzle. If necessary, replace with a new nozzle. Dirt in the fuel hoses or lines. Clean fuel system lines and hoses. Plugged air cleaner. Clean or replace element. Cylinder head gasket is damaged. Replace the gasket as required.

Engine knocking or noise: Low coolant temperature. Normalize the temperature by warming up the engine. Not enough engine oil. Check and refill engine oil. Timing of fuel injection pump is incorrect. Use the correct fuel injection pump timing adjustment. Pistons are broken or worn. Pistons replacement required. Connecting rod is defective or not aligned. Align or change connecting rod.

Engine stops when idling: Improperly adjusted low idle speed. Test and adjust. Incorrect valve clearance. Have it adjusted. Fuel injection pump malfunction. Replacement or repair required.

Insufficient oil pressure: Lack of oil. Checking oil level and add if necessary. Oil pump failure. Remove and inspect oil pump. Engine oil filter is plugged. Change or service engine oil filter.

New Holland TD90D Transmission Troubleshooting

Transmission is making noise: Improper backlash or worn gears. Install new gears and adjust backlash properly. Worn or bent gear shift forks. Change defective shift forks. Worn or stuck shaft splines. Install a new shaft. Transmission fluid level is low. Need to add transmission fluid. Bearings are cracked or worn. Replace the bearings. Transmission fluid contamination. Transmission fluid change required.

Gears are hard to shift: Gear shift linkage is corroded or worn. Install new shift linkage. Clutch is out of adjustment or defective. Adjust correctly or replace. Worn or bent gear shift forks. Shift forks need to be replaced. Gearshift mechanism is damaged. Replace or repair the mechanism.

Insufficient transmission fluid pressure: Insufficient transmission oil. Fill up the transmission oil. Clogged transmission oil filter element (if fitted). Clean or replace the transmission filter. Stuck relief valve. Replace valve as required.

Transmission oil leaking: Worn seals or gaskets. Seals and gaskets need to be replaced. High transmission fluid level. Drain the excess fluid.

New Holland TD90D Hydraulics Troubleshooting

Hydraulic system is too hot: Hydraulic fluid type is incorrect. Pour the correct type of fluid. Hydraulic oil contamination. Change the oil. Air in the hydraulic system. Air bleeding. Main relief valve malfunctioning. Relief valve replacement required.

Insufficient hydraulic fluid pressure: Hydraulic fluid level low. Add fluid as required. Clogged hydraulic oil filter element. Install a new hydraulic filter element. Leaks in hydraulic lines. Find leaks in the system and fix it. Not adjusted hydraulic spool valve. Need to adjust spool valve. Faulty hydraulic pump. Repair or replace hydraulic fluid pump. Hydraulic cylinder is broken. Repair or replace hydraulic cylinder.

3-point hitch fails to lift or lifts slowly: Hydraulic pump is defective. Install a new hydraulic fluid pump. Main relief valve is faulty. Install a new relief valve. Damaged hydraulic control valve. Change or repair hydraulic valve. Hydraulic cylinder not working. Replace or repair hydraulic cylinder. Hydraulic fluid is insufficient. Add fluid as required. Clogged hydraulic oil filter element. Clean the hydraulic filter or install new filter element. Excessive load on hitch. Reduce hitch load.

Three-point hitch cannot be dropped or dropping is too slow: Hydraulic cylinder is faulty. Replace or repair hydraulic cylinder. Not adjusted hydraulic control valve. Need to adjust. Worn hitch rock shaft. Change the shaft. Unadjusted hitch. Adjust the hitch.

Jerky lowering or lifting of the hitch: Hydraulic oil contamination. Change the oil. Hydraulic pump not working. Repair or replace hydraulic oil pump. Air trapped in hydraulic system. Bleed air from system. Hydraulic spool valve block is defective. Repair or replace the valve. Damaged hydraulic cylinder. Install a new hydraulic cylinder or repair it.

New Holland TD90D Steering System Troubleshooting

Steering wheel free play is excessive: Steering column shaft or coupling has maximum wear. Change faulty part. Steering pump stopped working. Repair or change steering pump. Worn or loose steering linkage assembly. Check and change as required. Steering control unit has wear or malfunction. Inspect and replace as required.

Difficult steering: Air in the hydraulic steering system. Bleed the steering system. Steering filter is dirty. Service steering filter. Steering oil level is low. Fill up steering oil to required level. Faulty or worn steering control unit. Inspect and replace as required. Defective hydraulic steering pump. Replace or repair steering pump. Pump flow control valve is stuck or worn. Service or change control valve. Improperly mounted or worn steering column. Mount the steering column as required or change it. Tire pressure is uneven. Adjust the tire pressure. Not adjusted toe-in. Adjust toe-in wheels. Steering cylinder leakage. Replace scratched piston rod or worn cylinder seals.

Front wheels wander to left or right: Steering control unit has malfunction or wear. Check and replace as required. Steering cylinder malfunction. Repair or replace hydraulic steering cylinder. Incorrect toe-in. Adjust toe-in properly. Steering linkage joints are worn or loose. Repair or change steering linkage. Improperly adjusted or worn front wheel bearings. Adjust correctly or change bearings. Uneven tire pressure. Inflate the tires properly.

New Holland TD90D Electrical System Troubleshooting

Battery is not charging: Wiring connections are corroded or loose. Service or tighten connections. Defective electrical terminal connectors. Change terminal connectors. Bad cell in battery. Battery change required. Loose or damaged belt. Belt needs to be adjusted or replaced.

Starter turning slow: Low battery output. Recharge the battery. Battery drains quickly. Service battery or replace it. Faulty battery terminals or disconnected cables. Connect wiring correctly or install new terminals.

Starter doesn't crank: Battery is discharged or worn. Recharge or replace battery. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery power. Battery is drained, recharge it. Starter motor failure. Repair or change starter.