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New Holland TZ25DA Troubleshooting

New Holland TZ25DA Engine Troubleshooting

Engine starts hard or will not start: Fuel filter element is dirty. Replace the filter element. Air in the fuel lines. Bleed the fuel lines. Clogged or burnt injection nozzle. Clean or change injection nozzles. Fuel injection pump is faulty. Repair or install new pump.

Engine shuts off suddenly while running: Incorrect adjustment of fuel injection pump timing. Adjust fuel injection pump as required. Clogged fuel filter. Clean or change the filter. Engine is cold. Engine is not warmed up to the required temperature.

Diesel starts and suddenly stops: Clogged fuel filter. Clean the filter or install new filter element. Defective fuel injection pump. Repair or install a new fuel pump. Air filter plugged. Change air filter element.

Engine overheats: Dirty radiator fins or faulty radiator cap. Clean radiator or install new cap. Not enough coolant. Add coolant fluid and inspect the cooling system for leaks. Broken or loose fan belt. Install new fan belt. Lack of engine oil. Fill up the engine oil.

Low engine power: Clogged injection nozzle. Replace injection nozzles. Fuel lines or hoses are clogged. Clean fuel system lines and hoses. Dirty air filter. Install new air filter element. Cylinder head gasket defective. Gasket should be replaced.

Engine knocking sound or abnormal noise: Engine is not fully warmed up. Engine is not warmed up to the required temperature. Low engine oil level. Fill the crankcase with engine oil. Wrong setting of fuel injection pump timing. Adjust as recommended. Worn or broken pistons. Pistons replacement required. Connecting rod is not aligned or worn. Connecting rod needs to be aligned or changed.

Engine stalls while idle: Incorrect low idle setting. Adjustment required. Valve clearance is wrong. Need to adjust valve clearance. Fuel injection pump is defective. Install a new pump or rebuild.

Insufficient oil pressure: Lack of oil. Check oil level and add oil as required. Defective oil pump. Repair or change. Oil filter element clogged. Change or service engine oil filter.

New Holland TZ25DA Hydrostatic Transmission Troubleshooting

Hydrostatic transmission noises: Speed control linkage is worn or unadjusted. Replace or adjust linkage. Excessive transmission load. Reduce transmission load. Insufficient oil level or contaminated oil. Change transmission oil or top up to proper level. Stuck relief valve. Replace relief valve. Damaged or worn components of hydrostatic transmission. Change or repair defective parts.

Transmission fluid overheating: Transmission overloaded. Load needs to be reduced. Defective or plugged cooling components. Check all cooling components and clean or replace if required. Transmission fluid level is low. Add fluid to the transmission housing. Dirty transmission oil filter element. Clean or replace the transmission filter.

Power is insufficient: Low oil level. Fill the transmission housing with oil. Defective relief valve. Install a new valve. Speed control linkage is worn or unadjusted. Adjust or repair linkage.

Transmission oil leaking: Clogged transmission fluid return pipe. Clean or change return pipe. Seals or gaskets are worn. Replace worn seal or gaskets. Internal transmission housing pressure is too high. Change defective parts.

New Holland TZ25DA Hydraulics Troubleshooting

Excessive hydraulic system heat: Wrong hydraulic oil type. Fill up with the correct type of oil. Dirty hydraulic oil. The oil must be changed. Air in the hydraulic system. Air bleeding. Main relief valve malfunctioning. Replace relief valve.

Insufficient hydraulic fluid pressure: Low hydraulic oil level. Fill the system to proper hydraulic oil level. Clogged hydraulic oil filter. Clean the hydraulic filter element or replace if necessary. Hydraulic piping is leaking. Check the hydraulic system and fix leaks. Hydraulic spool valve block is not adjusted properly. The spool valve should be properly adjusted. Hydraulic pump malfunction. Repair or replace hydraulic fluid pump. Defective hydraulic cylinder. Change or repair hydraulic cylinder.

3-point hitch fails to lift or lifts slowly: Hydraulic pump malfunction. Change or repair hydraulic oil pump. Damaged main relief valve. Relief valve need to be replaced. Defective hydraulic spool valve. Repair or replace hydraulic valve. Hydraulic cylinder failure. Repair or install a new hydraulic cylinder. Hydraulic oil level low. Check and refill the hydraulic oil. Dirty hydraulic oil filter element. Change the hydraulic filter element or service if required. Excessive loading on the hitch. Reduce the load is required.

Hitch won't drop or drops slowly: Damaged hydraulic cylinder. Repair or replace hydraulic cylinder. Not adjusted hydraulic spool valve. Need to adjust spool valve. Damaged lift arm shaft. Replace the shaft. The 3-point hitch is not adjusted. The three-point hitch must be adjusted.

Jerky lowering or lifting of the hitch: Dirty hydraulic oil. The oil must be changed. Hydraulic pump is faulty. Change or repair hydraulic fluid pump. Air in hydraulic lines. Bleed hydraulic lines. Defective hydraulic control valve. Repair or replace hydraulic valve. Hydraulic cylinder not working. Repair or install a new hydraulic cylinder.

New Holland TZ25DA Steering System Troubleshooting

Excessive play in steering: Steering column coupling or shaft has maximum wear. Replace faulty part. Steering pump is worn. Steering pump needs to be repaired or replaced. Loose or worn steering linkage components. Change or repair steering linkage. Worn or defective steering control unit. Change or repair steering control unit if required.

Steering wheel turns hard: Air in the hydraulic steering system. Bleed air from system. Steering filter clogging. Clean or replace filter element. Steering oil level is insufficient. Checking steering oil level and add it if necessary. Steering control unit has wear or malfunction. Inspect and replace as required. Faulty steering pump. Install a new hydraulic steering pump. Stuck or damaged steering pump control valve. Service or replace flow control valve. Improperly assembled or defective steering column. Reassemble or change the steering column. Uneven tyre pressure. Inflate the tyres properly. Improper toe-in. Check and adjust toe-in. Steering cylinder is leaking. Replace worn seal sleeves or damaged piston rod.

Front wheels wander to left or right: Steering control unit has damage or wear. Change or repair steering unit if required. Steering cylinder is faulty. Repair or change steering cylinder. Incorrect toe-in. Check toe-in and correct. Loose or worn steering linkage components. Check and replace as required. Front wheel bearings are defective or improperly adjusted. Adjust correctly or change bearings. Front tyres are worn unevenly. Install new tyres.

New Holland TZ25DA Electrical System Troubleshooting

Battery will not charge: Loose or corroded wire connections. Clean or tighten connections. Faulty battery terminal clamps. Terminal clamps need to be replaced. Battery is worn. Battery change required. Belt is defective or loose. Need to adjust belt tension or replace belt.

Starter motor cranks slow: Battery power is low. Recharge the battery. Battery is draining quickly. Service charging system or replace battery. Terminals are faulty or battery cables are disconnected. Check wiring connections and replace or clean terminals.

Starter doesn't crank: Battery is low or faulty. Change or recharge battery. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery capacity. Charge the battery. Starter motor is faulty. Starter needs to be changed.