________________________________________________________________________________

New Holland TZ18DA Troubleshooting

New Holland TZ18DA Engine Troubleshooting

Engine starts hard or will not start: Fuel filter plugging. Clean the filter element. Air in the fuel system. Air bleeding. Dirty or damaged injection nozzles. Replace injection nozzles. Fuel injection pump is not operating properly. Repair or change injection pump.

Engine stops running suddenly: Improper fuel injection timing. Adjust fuel injection pump as required. Clogged fuel filter. Service or replace the filter. Coolant temperature is low. Engine is not warmed up to the required temperature.

Diesel starts but immediately shuts off: Dirty fuel filter. Change the filter element. Fuel injection pump is damaged. Rebuild or install a new injection pump. Plugged air cleaner. Service or replace the air filter.

Engine is overheated: Clogged radiator fins or leaking radiator cap. Clean radiator or install new cap. Not enough coolant. Add coolant and check the components of cooling system. Fan belt slipping or worn. Replace the fan belt. Engine oil insufficient. Check oil level and add oil as required.

Loss of engine power: Fuel injection nozzles are faulty or clogged. Replace injection nozzles. Dirt in the fuel lines or hoses. Fuel hoses and lines must be clean. Dirty air cleaner. Air filter maintenance required. Cylinder head gasket is blown. Replace the gasket as required.

Abnormal engine noise or knocking: Engine is not fully warmed up. Normalize the temperature by warming up the engine. Engine oil level is insufficient. Fill up the engine oil. Timing of fuel injection pump is incorrect. Set it up as required. Scored or worn pistons. Pistons replacement required. Connecting rod is misaligned or worn. Connecting rod must be aligned or replaced.

Engine stops while idling: Low idle speed set incorrectly. Adjust low idle speed. Improper valve clearance. Correct valve clearance needs to be set. Faulty fuel injection pump. Rebuild or change fuel pump.

Insufficient oil pressure: Lack of oil. Add oil to the engine crankcase. Oil pump is damaged. Repair or change. Plugged engine oil filter. Replace or service engine oil filter.

New Holland TZ18DA Hydrostatic Transmission Troubleshooting

HST transmission noises: Worn or out of adjustment speed control linkage. Adjust or replace linkage. Transmission overload. Reduce transmission load. Low transmission oil level or contaminated oil. Change transmission oil or top up to proper level. Defective relief valve. Change relief valve. Transmission parts are worm or defective. Check internal transmission parts for damage or wear and replace if required.

Transmission oil overheated: Transmission is under excessive load. Reduce the load is required. Cooling components are defective or plugged. Inspect all cooling components and service or replace if necessary. Transmission oil insufficient. Fill the transmission housing to proper oil level. Transmission oil filter is clogged. Service or change transmission oil filter.

Power is insufficient: Insufficient transmission oil. Fill up the transmission oil. Relief valve failure. Replace relief valve. Worn or out of adjustment speed control linkage. Adjust or repair linkage.

External oil leaks: Oil drain line is clogged. Clean or change the line. Damaged gaskets or seals. Install new components. Transmission case internal pressure is too high. Replace worn components.

New Holland TZ18DA Hydraulics Troubleshooting

Hydraulics overheating: Wrong hydraulic fluid type. Pour the proper type of fluid. Hydraulic oil is dirty. Hydraulic oil change required. There is air in the hydraulic system. Bleed hydraulic system. Main relief valve is defective. Replace relief valve.

Hydraulic oil pressure is insufficient: Hydraulic fluid is insufficient. Fill up the hydraulic fluid. Dirty hydraulic fluid filter element. Service or replace the hydraulic filter. Leaking hydraulic lines. Inspect hydraulic system for leaks and repair it. Incorrect adjusted hydraulic spool valve. Adjust the spool valve correctly. Hydraulic pump failure. Replace or repair hydraulic fluid pump. Hydraulic cylinder failure. Repair or change hydraulic cylinder.

Hitch won't raise or raises slowly: Hydraulic pump is defective. Replace or repair hydraulic oil pump. Main relief valve malfunction. Relief valve replacement required. Faulty hydraulic spool valve. Repair or change hydraulic valve. Defective hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic fluid level low. Add fluid as required. Dirty hydraulic fluid filter element. Clean the hydraulic filter element or replace if necessary. Excessive loading on the hitch. Reduce hitch load.

Hitch cannot be dropped or dropping is too slow: Hydraulic cylinder malfunction. Change or repair hydraulic cylinder. Hydraulic control valve block is out of adjustment. Control valve needs to be adjusted. Worn hitch rock shaft. Replace the shaft. Three-point hitch is out of adjustment. Adjust 3-point hitch as required.

3-point hitch jerks when lower or lift: Hydraulic oil is contaminated. Fill up with fresh hydraulic oil. Hydraulic pump is faulty. Install a new hydraulic oil pump. Air in hydraulic system. Bleed air from hydraulic system. Defective hydraulic control valve block. Repair or replace hydraulic valve. Damaged hydraulic cylinder. Repair or install a new hydraulic cylinder.

New Holland TZ18DA Steering Troubleshooting

Excessive play in steering: Steering column coupling or shaft is extremely worn out. Replace faulty part. Defective hydraulic steering pump. Repair or change steering pump. Steering linkage assembly is worn or loose. Check and replace as required. Power steering control unit is defective or worn. Check and replace as required.

Steering wheel turns hard: Air lock in hydraulic steering system. Need to bleed air. Clogged steering filter element. Steering filter need to be replaced. Steering oil level is insufficient. Checking steering oil level and add it if necessary. Power steering control unit has wear or damage. Repair or replace the steering unit. Faulty steering pump. Repair or change steering pump. Stuck or faulty steering pump control valve. Service or replace flow control valve. Defective or incorrectly mounted steering column. Change steering column or mount correctly. Tire pressure uneven. Inflate the tires correctly. Incorrect toe-in. Check and adjust toe-in. Steering cylinder leakage. Change worn piston rod or damaged cylinder seals.

Front wheels wander to right or left: Power steering control unit is damaged or worn. Change or repair steering unit if required. Defective steering cylinder. Repair or replace steering cylinder. Incorrect toe-in. Check toe-in and correct. Loose or worn steering linkage components. Repair or replace steering linkage. Improperly adjusted or defective front wheel bearings. Adjust correctly or install new bearings. Front tyres wear unevenly. Change the tyres.

New Holland TZ18DA Electrical System Troubleshooting

Battery cannot be charged: Wiring connections are loose or corroded. Service or tighten connections. Battery terminal connectors are faulty. Change terminal connectors. Battery failing. Replace the battery. Loose or defective belt. Belt needs to be adjusted or replaced.

Starter motor cranks slow: Low battery capacity. Battery needs to be recharged. Battery is draining quickly. Service charging system or install new battery. Disconnected battery cables or bad terminals. Check cables and service or change terminals.

Starter will not work: Battery is drained or worn. Recharge or change battery. Wire harness is disconnected or incorrectly connected. Check wire harness and connect as required. Low battery capacity. Battery is drained, charge it. Starter motor failing. Repair or install a new starter.