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New Holland TC25D Troubleshooting

New Holland TC25D Engine Troubleshooting

Engine hard to start or will not start: Fuel filter plugging. Replace the filter element. Air trapped in fuel system. Bleed air. Fuel injection nozzles are dirty or defective. Replace injection nozzles. Fuel injection pump damage. Replace injection pump or repair it.

Engine stalls after running: Fuel injection pump timing is not adjusted. Use the correct fuel injection pump timing adjustment. Clogged fuel filter. Filter maintenance required. Engine is cold. Warm up engine as required.

Engine starts but immediately stalls: Fuel filter plugging. Clean the filter or install new filter element. Fuel injection pump malfunctioning. Rebuild or change fuel pump. Restricted intake air. Service air cleaner.

Engine overheats: Clogged radiator core or damaged radiator cap. Clean radiator or change cap. Coolant level is low. Fill radiator to proper level and check components for faults. Fan belt slipping or worn. Install new fan belt. Not enough engine oil. Need to add engine oil.

Poor engine power: Defective or clogged injection nozzle. Inspect nozzles and replace if necessary. Dirty fuel hoses or lines. Fuel hoses and lines must be clean. Clogged air filter. Clean air cleaner element. Cylinder head gasket is blown. Replace the gasket as required.

Abnormal engine noise or knocking: Engine has not warmed up to the recommended temperature. Warm up to required temperature. Not enough engine oil. Check and refill engine oil. Fuel injection pump timing is wrong. Check the fuel injection pump timing adjustment. Broken or worn pistons. Replace the pistons as required. Faulty or misaligned connecting rod. Connecting rod needs to be replaced or aligned.

Engine stops when idling: Wrong adjustment of low idle speed. Test and adjust. Improper valve clearance. Adjust valve clearance. Fuel injection pump is faulty. Rebuild or change fuel pump.

Insufficient oil pressure: Low crankcase oil level. Fill the crankcase with oil. Defective oil pump. Install a new pump. Plugged engine oil filter. Clean or replace engine oil filter element.

New Holland TC25D Transmission Troubleshooting

Transmission makes excessive noise: Backlash is incorrect or gears are damaged. Adjust backlash correctly or replace the gears. Worn or damaged gear shift forks. Shift forks need to be replaced. Shaft splines are damaged or worn. Shaft need to be changed. Transmission fluid insufficient. Need to add transmission fluid. Worn or damaged bearings. Faulty bearings should be changed. Transmission fluid is contaminated. Fill up with fresh transmission fluid.

Hard shifting: Worn or rusty gear shift linkage. Lubricate or replace the shift linkage. Unadjusted or worn clutch. Clutch adjustment or replacement required. Shift forks are bent or worn out. Change the shift forks. Worn gear shifting mechanism. Repair or change worn components if necessary.

Low transmission fluid pressure: Low fluid level. Need to add transmission fluid. Transmission fluid filter element is clogged (if equipped). Clean or change transmission fluid filter. Stuck relief valve. Change the valve.

External oil leaks: Seals or gaskets are broken. Change defective gaskets or seal. Transmission fluid level is exceeded. Excess fluid must be drained.

Hydrostatic Transmission Troubleshooting

HST transmission noise: Speed control pedal linkage is damaged or out of adjustment. Adjust or repair linkage. Transmission is under excessive load. Reduce transmission load. Low transmission oil level or contaminated oil. Add oil to proper level or pour fresh transmission oil. Relief valve is damaged. Replace relief valve. Worn or defective transmission components. Replace or repair defective components.

Transmission oil overheated: Excessive loading. Load needs to be reduced. Cooling components are plugged or defective. Check all cooling components and change or repair if required. Transmission oil insufficient. Check transmission oil level and add oil as required. Transmission oil filter is dirty. Service or replace the transmission oil filter.

Loss of power: Low fluid level. Fill the transmission housing to proper fluid level. Relief valve is damaged. Replace relief valve as required. Speed control linkage is defective or unadjusted. Adjust or change linkage.

Transmission fluid leaking: Oil drain line is clogged. Clean or change the line. Seals or gaskets are worn. Replace worn gaskets or seal. High internal transmission housing pressure. Replace worn components.

New Holland TC25D Hydraulic System Troubleshooting

Hydraulic system overheating: Incorrect type of hydraulic oil. The correct type of oil must be used. Hydraulic oil is dirty. Hydraulic oil change required. Air in hydraulic lines. Bleed hydraulic lines. Main relief valve malfunctioning. Install a new relief valve.

Hydraulic oil pressure too low: Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Dirty hydraulic oil filter element. Replace filter element or clean if required. Leaks in hydraulic lines. Inspect hydraulic system for leaks and repair it. Hydraulic control valve is set improperly. The control valve must be set correctly. Hydraulic pump malfunction. Change or repair hydraulic oil pump. Broken hydraulic cylinder. Repair or replace hydraulic cylinder.

Hitch won't raise or raises slowly: Defective hydraulic pump. Install a new hydraulic fluid pump. Main relief valve malfunctioning. Relief valve need to be replaced. Defective hydraulic spool valve. Repair or change the valve. Damaged hydraulic cylinder. Repair or change hydraulic cylinder. Hydraulic fluid is insufficient. Add fluid as required. Hydraulic oil filter is clogged. Clean or change hydraulic filter. Excessive hitch loading. Reduce loading.

Hitch fails to drop or drops slowly: Faulty hydraulic cylinder. Change or repair hydraulic cylinder. Hydraulic spool valve is not set properly. Set the spool valve properly. Damaged lift arm shaft. Change the shaft. The hitch is not adjusted. Adjust the hitch.

Hitch lifting or lowering is jerky: Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Faulty hydraulic pump. Replace or repair hydraulic fluid pump. Air in the hydraulic system. Air bleeding. Faulty hydraulic spool valve. Install a new valve or repair it. Broken hydraulic cylinder. Repair or install a new hydraulic cylinder.

New Holland TC25D Steering System Troubleshooting

Steering wheel has too much free-play: Worn steering column shaft or coupling. Change faulty component. Damaged hydraulic steering pump. Check the hydraulic steering pump and change if necessary. Steering linkage components are loose or worn. Replace or repair steering linkage. Steering control unit is damaged or worn. Inspect and change as required.

Hard Steering: Air trapped inside steering system. Bleed the steering system. Steering filter is clogged. 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. Steering pump is faulty. Check the steering pump and replace if necessary. Stuck or damaged steering pump control valve. Replace or service control valve. Incorrectly fitted or worn steering column. Refit or replace the steering column. Front tyres wear unevenly. Change the tyres. Not adjusted toe-in. Check toe-in and correct. Steering cylinder leaks. Change worn piston seals or damaged piston rod.

Tractor is pulling to left or right: Steering control unit has wear or malfunction. Repair or replace the steering unit. Faulty steering cylinder. Repair or replace steering cylinder. Incorrect toe-in. Adjust toe-in wheels. Steering linkage joints are worn or loose. Inspect and replace as required. Worn or incorrectly adjusted or worn front wheel bearings. Adjust correctly or replace bearings. Uneven tire pressure. Inflate the tires properly.

New Holland TC25D Electrical System Troubleshooting

Battery won’t charge: Loose or corroded cable connections. Service or tighten connections. Faulty battery terminal connectors. Install new terminal connectors. Dead cell in battery. Replace the battery. Loose or worn belt. Need to adjust belt tension or replace belt.

Starter cranks slow: Low battery power. Low battery charging, charge as required. Battery drains quickly. Battery needs service or replacement. Battery cables are disconnected or terminals are faulty. Check wiring connections and replace or clean terminals.

Starter motor is not working: Battery is discharged or defective. Battery needs to be recharged or replaced. Disconnected or incorrectly connected wires. Inspect battery wires and connect correctly. Low battery capacity. Battery is drained, charge it. Damaged starter motor. Repair or change starter.