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New Holland T1520 Troubleshooting

New Holland T1520 Engine Troubleshooting

Engine starts hard or doesn't start: Clogged fuel filter. Service or replace the filter. Air in the fuel pipes. Bleed the fuel pipes. Faulty fuel injection nozzles. Test injection nozzles and change if necessary. Fuel injection pump malfunction. Repair or change injection pump.

Engine shuts off suddenly while running: Incorrect adjustment of fuel injection pump timing. Set the fuel pump timing correctly. Fuel filter plugged. Filter maintenance required. Engine is not preheated. Warm up to required temperature.

Diesel starts and stops: Fuel filter plugged. Replace filter element. Fuel injection pump is defective. Repair or replace injection pump. Dirty air filter. Carry out maintenance on air filter.

Engine overheated: Dirty radiator core or faulty radiator cap. Clean radiator or replace cap. Low coolant level. Add coolant and check the components of cooling system. Broken or loose fan belt. Belt replacement is recommended. Engine oil insufficient. Fill up the oil to required level.

Loss of engine power: Fuel injection nozzles are damaged. Replace injection nozzles. Dirt in the fuel lines or hoses. Clean fuel system lines and hoses. Air filter element clogged. Service air cleaner. Leaking cylinder head gasket. Install new cylinder head gasket.

Abnormal engine noise or knocking: Engine is not warmed up to the required temperature. Normalize the temperature by warming up the engine. Engine oil level is insufficient. Check oil level and add oil as required. Improper setting of fuel injection pump timing. Adjust fuel injection pump as required. Pistons are broken or worn. Replace the pistons. Misaligned or faulty connecting rod. Align or replace connecting rod.

Engine stalls while idle: Incorrectly set low idle speed. Adjust as required. Excessive valve clearance. Check and adjust. Defective fuel injection pump. Rebuild or replace pump.

Insufficient oil pressure: Engine oil insufficient. Fill the crankcase with oil. Oil pump is defective. Replace as required. Engine oil filter is plugged. Change or service engine oil filter.

New Holland T1520 Transmission Troubleshooting

Transmission is making noise: Incorrect backlash or gears are worn. Change worn gears or adjust backlash correctly. Damaged or worn gear shift forks. Replace defective shift forks. Shaft splines are damaged or worn. Replace the shaft. Transmission fluid insufficient. Checking transmission fluid level and add if necessary. Worn or broken bearings. Bearings replacement required. Transmission oil contamination. Change the oil.

Gear shift is hard: Rusty or worn gear shift linkage. Install a new gear shift linkage. Clutch is faulty or misadjusted. Clutch needs to be replaced or adjusted. Damaged or worn gear shift forks. Shift forks need to be changed. Gear shifting mechanism is defective. Defective parts must be replaced.

Insufficient transmission fluid pressure: Transmission fluid insufficient. Need to add transmission fluid. Transmission oil filter is dirty (if equipped). Service or change transmission oil filter. Stuck relief valve. Replace relief valve.

Transmission fluid leaking: Damaged gaskets or seals. Seals and gaskets need to be replaced. Transmission oil level is exceeded. Correct the oil volume.

Hydrostatic Transmission Troubleshooting

HST transmission noises: Speed control pedal linkage is bent or not adjusted. Change or adjust linkage. Transmission overloaded. Load needs to be reduced. Oil is dirty or oil level is too low. Add oil to proper level or pour fresh transmission oil. Relief valve failure. Change relief valve. Damaged or worn components of hydrostatic transmission. Replace or repair defective components.

Transmission oil overheating: Transmission overload. Load needs to be reduced. Damaged or clogged cooling components. Inspect all cooling components and replace or clean if necessary. Transmission oil insufficient. Fill the transmission housing with oil. Transmission oil filter is dirty. Clean or change transmission oil filter.

Power is insufficient: Insufficient transmission oil. Check transmission oil level and add oil as required. Relief valve is stuck. Install a new valve. Speed control linkage is worn or unadjusted. Adjust or install new linkage.

Transmission oil leakage: Clogged transmission fluid return tube. Clean or replace return tube. Seals or gaskets are broken. Gaskets or seal need to be replaced. High internal transmission housing pressure. Replace worn components.

New Holland T1520 Hydraulics Troubleshooting

Hydraulics overheating: Improper type of hydraulic oil. Use the proper type of oil. Contaminated hydraulic fluid. Change hydraulic fluid. There is air in the hydraulic system. Bleed hydraulic system. Main relief valve is damaged. Replace relief valve.

Hydraulic fluid pressure too low: Insufficient hydraulic oil. Need to add oil. Clogged hydraulic oil filter. Change hydraulic filter element or clean if necessary. Leaking hydraulic lines. Inspect hydraulic system for leaks and repair it. Hydraulic spool valve is out of adjustment. Spool valve adjustment required. Faulty hydraulic pump. Repair or replace hydraulic fluid pump. Hydraulic cylinder is faulty. Replace or repair hydraulic cylinder.

Hitch won't raise or raises slowly: Damaged hydraulic pump. Install a new hydraulic oil pump. Damaged main relief valve. Change relief valve. Defective hydraulic spool valve. Repair or replace the valve. Damaged hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic fluid is insufficient. Add fluid as required. Dirty hydraulic fluid filter element. Hydraulic filter maintenance required. Excessive loading on the hitch. Reduce hitch load.

Hitch not lowering or hitch lowers slowly: Hydraulic cylinder is faulty. Install a new hydraulic cylinder or repair it. Hydraulic control valve block is set improperly. Set properly. Worn hitch cross shaft. Change the shaft. Three-point hitch has not been adjusted. The 3-point hitch must be adjusted.

Jerky lowering or lifting of the hitch: Contaminated hydraulic oil. Change hydraulic oil. Hydraulic pump is faulty. Change or repair hydraulic oil pump. There is air in the hydraulic system. Bleed hydraulic system. Hydraulic control valve is faulty. Install a new valve or repair it. Hydraulic cylinder is broken. Repair or change hydraulic cylinder.

New Holland T1520 Steering Troubleshooting

Steering wheel has too much free-play: Worn steering column shaft or coupling. Replace faulty part. Damaged hydraulic steering pump. Install a new steering pump. Worn or loose steering linkage assembly. Replace or repair steering linkage. Hydrostatic steering unit is worn or defective. Inspect and change as required.

Steering is stiff: Air trapped inside steering system. Bleed the system of air. Dirty steering filter. Replace steering filter element. Steering oil insufficient. Check and refill steering oil. Hydrostatic steering unit is defective or worn. Inspect and change as required. Steering pump stopped working. Install a new steering pump. Steering pump control valve is stuck or worn. Install a new flow control valve or clean it. Improperly fitted or damaged steering column. Refit or change the steering column. Tyre pressure is uneven. Adjust the tyre pressure. Incorrect toe-in. Adjust toe-in properly. Steering cylinder leakage. Change damaged piston rod or worn piston seals.

Front wheels wander to right or left: Hydrostatic steering unit is defective or worn. Inspect and replace as required. Worn steering cylinder. Replace or repair steering cylinder. Incorrect toe-in. Adjust toe-in properly. Loose or worn steering linkage components. Repair or change steering linkage. Front wheel bearings are damaged or incorrectly adjusted. Adjust correctly or change bearings. Tire pressure is uneven. Adjust the tire pressure.

New Holland T1520 Electrical Troubleshooting

Battery does not charge: Loose or corroded electrical wiring connections. Tighten or service cable connections. Faulty electrical terminal connectors. Replace terminal connectors. Bad cell in battery. Replace the battery. Belt is worn or loose. Change belt or adjust belt tension.

Starter motor cranks slow: Low battery voltage. Battery is drained, charge it. Battery runs out quickly. Battery needs service or replacement. Disconnected wires or corroded battery terminals. Check wiring connections and replace or clean terminals.

Starter will not crank: Battery is low or faulty. Charge or change the battery. Battery cables are disconnected or incorrectly connected. Check cables and connect as needed. Low battery voltage. Battery is drained, charge it. Damaged starter motor. Starter should be replaced.