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New Holland TN70 Troubleshooting

New Holland TN70 Engine Troubleshooting

Engine starts up hard or won't start: Fuel filter element is dirty. Replace filter element. Air in fuel tank. Bleed fuel tank. Defective injection nozzle. Install a new kit of correctly balanced nozzles. Faulty fuel injection pump. Replace injection pump or repair it.

Engine stops suddenly during operation: Incorrect adjustment of fuel injection pump timing. Adjust according to specifications. Dirty fuel filter. Change filter element. Coolant temperature is low. Warm up the engine.

Engine stalls after starting: Fuel filter element clogging. Change the filter element. Fuel injection pump malfunction. Replace injection pump or repair it. Air filter plugged. Clean or replace the element.

Engine is overheated: Damaged radiator cap or dirty radiator core. Replace cap or clean radiator. Lack of coolant in cooling system. Top up coolant fluid and check system for leaks. Fan belt is worn or faulty. Change the fan belt. Not enough engine oil. Check oil level and add oil as required.

Engine power is too low: Clogged or burnt injection nozzle. Clean or replace injection nozzles. Fuel lines or hoses clogging. Clean fuel system hoses and lines. Clogged air cleaner. Service or replace the air filter. Cylinder-head gasket is leaking. Replace the gasket as required.

Engine knocking or noise: Engine not warmed up. Warm up engine as required. Engine oil insufficient. Need to add engine oil. Improper fuel injection timing. Check the fuel injection pump timing adjustment. Scored or worn pistons. Pistons replacement required. Connecting rod is misaligned or worn. Connecting rod must be aligned or replaced.

Engine stops while idle: Low idle speed setting is not correct. Adjust low idling as recommended. The valve clearance is not adjusted. Adjust valve clearance. Fuel injection pump is broken. Replace or repair injection pump.

Low oil pressure: Not enough oil in the engine. Need to add oil. Oil pump failure. Replace as required. Oil filter is dirty. Replace or service engine oil filter.

New Holland TN70 Transmission Troubleshooting

Transmission noise: Improper backlash or worn gears. Replace defective gears or set backlash properly. Worn or damaged gear shift forks. Shift forks need to be replaced. Worn or damaged shaft splines. Install a new shaft. Low oil level. Check and refill the transmission oil. Worn or broken bearings. Replace faulty bearings. Transmission fluid is contaminated. Fill up with fresh transmission fluid.

Gear shift is hard: Stuck or worn gear shift linkage. Lubricate or replace the shift linkage. Worn or improperly adjusted clutch. Change or adjust clutch. Worn or bent shift forks. Shift forks need to be replaced. Defective parts in the gearshift mechanism. Replace defective parts.

Low transmission pressure: Lack of transmission oil supply. Fill up the transmission oil. Clogged transmission oil filter element (if fitted). Service or change transmission oil filter. Relief valve is damaged. Change relief valve.

External fluid leaks: Damaged seals or gaskets. Gaskets or seal replacement required. Transmission oil level is exceeded. Correct the oil volume.

New Holland TN70 Hydraulics Troubleshooting

Hydraulic system overheats: Hydraulic fluid type is incorrect. Pour the correct type of fluid. Dirty hydraulic fluid. The fluid must be changed. Air in the hydraulic system. Air bleeding. Main relief valve malfunction. Relief valve replacement required.

Hydraulic fluid pressure is insufficient: Insufficient hydraulic oil. Checking hydraulic oil level and add if necessary. Hydraulic oil filter element is clogged. Install a new hydraulic filter element. Leaking hydraulic lines. Check the system and repair leaks. Incorrect setting hydraulic control valve. Use the correct adjustment. Damaged hydraulic pump. Change or repair hydraulic oil pump. Hydraulic cylinder is faulty. Repair or replace hydraulic cylinder.

Three-point hitch cannot be lifted or lifting is too slow: Hydraulic pump is defective. Install a new hydraulic oil pump. Faulty main relief valve. Install a new relief valve. Hydraulic spool valve is defective. Replace or repair the valve. Hydraulic cylinder is broken. Change or repair hydraulic cylinder. Insufficient hydraulic fluid. Checking hydraulic fluid level and add if necessary. Hydraulic fluid filter element is clogged. Clean the hydraulic filter element or replace if necessary. Excessive hitch loading. Reduce the load is required.

Hitch cannot be lowered or lowering is too slowly: Damaged hydraulic cylinder. Repair or replace hydraulic cylinder. Incorrect adjusted hydraulic control valve. Adjust correctly. Worn lift arm shaft. Change the shaft. The hitch has not been adjusted. Adjust the hitch.

Hitch lift or lower is jerky: Dirty hydraulic oil. The oil must be changed. Damaged hydraulic pump. Install a new hydraulic fluid pump. Air trapped in hydraulic system. Bleed air from system. Defective hydraulic spool valve block. Repair or change the valve. Defective hydraulic cylinder. Repair or change hydraulic cylinder.

New Holland TN70 Steering Troubleshooting

Excessive steering wheel free play: Steering column coupling or shaft is extremely worn out. Change defective component. Worn steering pump. Install a new steering pump. Steering linkage assembly is worn or loose. Inspect and replace as required. Worn or defective hydrostatic steering unit. Replace or repair steering unit as required.

Heavy steering: Air trapped inside steering system. Bleed air from system. Clogged steering filter. Change steering filter element. Insufficient steering fluid. Fill up the steering fluid. Hydrostatic steering unit has malfunction or wear. Check and replace as required. Steering pump is worn. Steering pump needs to be repaired or replaced. Steering pump control valve is stuck or faulty. Replace or service control valve. Improperly installed or damaged steering column. Install the steering column as required or replace it. Uneven tyre pressure. Inflate the tyres properly. Not adjusted toe-in. Adjust toe-in properly. Leaking steering cylinder. Change worn piston rod or damaged cylinder seals.

Front wheels wander to right or left: Faulty or worn hydrostatic steering unit. Replace or repair steering unit as required. Worn steering cylinder. Repair or change hydraulic steering cylinder. Not adjusted toe-in. Check and adjust toe-in. Loose or worn steering linkage parts. Repair or replace steering linkage. Front wheel bearings are damaged or incorrectly adjusted. Change or adjust the bearings properly. Front tyres wear unevenly. Change the tyres.

New Holland TN70 Electrical System Troubleshooting

Battery will not charge: Electrical wire connections are corroded or loose. Clean or tighten wiring connections. Defective electrical terminal connectors. Terminal connectors should be replaced. Battery dead cell. Change the battery. Defective or loose belt. Replace belt or adjust belt tension.

Starter turning slow: Low battery capacity. Charge the battery. Battery runs out quickly. Battery needs service or replacement. Disconnected wiring or bad battery terminals. Check wire connections and change or service terminals.

Starter is not cranking: Battery is drained or worn. Recharge or replace battery. Wiring is incorrectly connected or disconnected. Inspect wiring and connect correctly. Low battery power. Battery needs to be recharged. Starter motor is faulty. Repair or install a new starter.