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New Holland TN70A Troubleshooting

New Holland TN70A Engine Troubleshooting

Engine difficult to start or doesn't start: Dirty fuel filter. Clean or replace the filter. Air trapped in fuel system. Bleed air. Dirty or faulty injection nozzles. Check and replace nozzles if required. Fuel injection pump malfunction. Replacement or repair required.

Engine stalls while running: Improper fuel injection timing. Check the fuel injection pump timing adjustment. Fuel filter plugging. Change the filter element. Engine has not warmed up to the recommended temperature. Warm up the engine.

Engine starts and then shuts off: Fuel filter plugged. Install new filter element. Fuel injection pump is damaged. Change pump or rebuild it. Plugged air cleaner. Carry out maintenance on air filter.

Engine overheats: Clogged radiator fins or damaged radiator cap. Replace cap or clean radiator. Low engine coolant. Add coolant and check the components of cooling system. Broken or loose fan belt. Belt replacement is recommended. Engine oil level low. Check and refill engine oil.

Diesel power loss: Clogged injection nozzle. Install a new kit of correctly balanced nozzles. Fuel hoses or lines are clogged. Clean fuel hoses and lines. Clogged air filter. Replace air filter element. Defective cylinder head gasket. Replace the gasket as required.

Abnormal engine noise or knocking: Engine is not preheated. Warm up the engine. Engine oil level low. Check and refill engine oil. Fuel injection pump timing is not adjusted. Set up as recommended. Scored or worn pistons. Replace the pistons as required. Connecting rod is not aligned or defective. Align or change connecting rod.

Engine stalls while idle: Incorrect low idle speed adjustment. Need to adjust idle speed. Excessive valve clearance. Need to adjust valve clearance. Fuel injection pump malfunction. Repair or install a new fuel pump.

Oil pressure too low: Lack of oil. Fill up the engine oil. Worn oil pump. Remove and inspect oil pump. Oil filter clogged. Change or service engine oil filter.

New Holland TN70A Transmission Troubleshooting

Transmission noise: Defective gears or improper backlash. Install new gears and set backlash correctly. Worn or bent shift forks. Install new shift forks. Shaft splines are stuck or worn out. Replace defective shaft. Lack of transmission oil supply. Need to add transmission oil. Worn or damaged bearings. Bearings need to be changed. Transmission oil is dirty. Transmission oil change required.

Difficulty shifting gears: Corroded or worn gear shift linkage. Lubricate or replace shift linkage. Malfunction or incorrect clutch adjustment. Adjust correctly or replace. Shift forks are bent or worn out. Replace the shift forks. Gearshift mechanism is damaged. Replace or repair the mechanism.

Insufficient transmission oil pressure: Transmission fluid insufficient. Need to add transmission fluid. Dirty transmission fluid filter element (if equipped). Service or replace the transmission fluid filter. Relief valve malfunction. Replace relief valve.

Transmission oil leaking: Broken seals or gaskets. Seals and gaskets replacement required. High transmission fluid level. Drain the excess fluid.

New Holland TN70A Hydraulics Troubleshooting

Hydraulic system is too hot: Wrong type of hydraulic fluid. Fill up with the correct type of hydraulic fluid. Hydraulic fluid is contaminated. Fill up with new hydraulic fluid. Air in hydraulic lines. Bleed hydraulic lines. Main relief valve failure. Relief valve replacement required.

Insufficient hydraulic fluid pressure: Low hydraulic oil level. Checking hydraulic oil level and add if necessary. Dirty hydraulic fluid filter. Hydraulic filter maintenance required. Leaks in hydraulic lines. Identify leaks in the system and repair it. Hydraulic spool valve block is not adjusted properly. The spool valve should be properly adjusted. Hydraulic pump malfunction. Install a new hydraulic oil pump. Hydraulic cylinder malfunction. Change or repair hydraulic cylinder.

Hitch can't lift or lifts too slowly: Damaged hydraulic pump. Change or repair hydraulic fluid pump. Damaged main relief valve. Change relief valve. Hydraulic control valve block is damaged. Repair or replace hydraulic valve. Defective hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic oil is insufficient. Checking hydraulic oil level and add if necessary. Hydraulic fluid filter element is clogged. Replace filter element or clean if required. Excessive loading on the hitch. The load should be reduced.

Hitch not lowering or hitch lowers slowly: Hydraulic cylinder not working. Change or repair hydraulic cylinder. Incorrect setting hydraulic spool valve. Use the correct setting. Worn hitch rock shaft. Install a new shaft. Three-point hitch is out of adjustment. The 3-point hitch must be adjusted.

Hitch lifting or lowering is jerky: Hydraulic fluid contamination. Change hydraulic fluid. Hydraulic pump is faulty. Replace or repair hydraulic fluid pump. Air in hydraulic lines. Bleed hydraulic lines. Hydraulic spool valve is faulty. Install a new valve or repair it. Hydraulic cylinder is faulty. Install a new hydraulic cylinder or repair it.

New Holland TN70A Steering Troubleshooting

Excessive steering wheel free play: Steering column shaft or coupling has maximum wear. Change faulty part. Steering pump stopped working. Replace or repair steering pump. Steering linkage assembly is worn or loose. Repair or replace steering linkage. Hydrostatic steering unit has wear or damage. Replace or repair steering unit as required.

Difficult steering: Air lock in hydraulic steering system. Bleed air from system. Steering filter is plugged. Install new steering filter element. Steering fluid insufficient. Check and refill steering fluid. Worn or defective hydrostatic steering unit. Check and replace as required. Hydraulic steering pump is defective. Repair or change steering pump. Steering pump control valve is worn or stuck. Clean or replace control valve. Damaged or incorrectly assembled steering column. Replace steering column or assemble correctly. Front tires wear unevenly. Change the tires. Not adjusted toe-in. Check toe-in and correct. Steering cylinder is leaking. Damaged cylinder seals or worn piston rod.

Tractor pulls to right or left: Hydrostatic steering unit is defective or worn. Check and replace as required. Steering cylinder is damaged. Repair or change hydraulic steering cylinder. Incorrect toe-in. Check and adjust toe-in. Loose or worn steering linkage parts. Repair or replace steering linkage. Incorrectly adjusted or damaged front wheel bearings. Adjust properly or replace bearings. Front tires wear unevenly. Change the tires.

New Holland TN70A Electrical System Troubleshooting

Battery cannot be charged: Corroded or loose electrical wire connections. Tighten or service connections. Faulty battery terminal connectors. Terminal connectors should be replaced. Battery failing. Change the battery. Defective or loose belt. Adjust belt tension or replace belt.

Starter motor cranks slow: Low battery voltage. Battery is drained, recharge it. Battery won’t hold charge. Service charging system or install new battery. Bad battery terminals or disconnected wiring. Check wiring connections and replace or clean terminals.

Starter motor won't turn: Battery is low or faulty. Recharge or change battery. Wire harness is disconnected or incorrectly connected. Check wire harness and connect as required. Low battery voltage. Charge the battery. Starter motor is faulty. Starter should be replaced.