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New Holland T6.155 Troubleshooting

New Holland T6.155 Engine Troubleshooting

Engine hard to start or won't start: Fuel filter plugging. Change the filter element. Air in fuel tank. Bleed fuel tank. Clogged or burnt injection nozzle. Check and replace nozzles if required. Damaged fuel injection pump. Replacement or repair required.

Engine shuts off suddenly during operation: Fuel injection pump timing is not adjusted. Check the fuel injection pump timing adjustment. Fuel filter element clogging. Change filter element. Engine is cold. Engine is not warmed up to the required temperature.

Engine starts but stops suddenly: Fuel filter plugged. Change filter element. Fuel injection pump is faulty. Repair or install new pump. Air filter plugged. Clean or replace element.

Engine overheating: Radiator core is dirty or radiator cap is damaged. Replace cap or clean radiator. Lack of engine coolant. The cooling system needs to be refilled and checked for faults. Fan belt is broken or worn. Replace the fan belt. Engine oil insufficient. Fill the crankcase with engine oil.

Lack of engine power: Defective or clogged injection nozzle. Check injection nozzles and replace if required. Fuel hoses or lines are dirty. Service fuel lines and hoses. Restricted intake air. Clean or change. Cylinder-head gasket is broken. Install a new gasket.

Engine knocking or noise: Engine is not warmed up to the required temperature. Warm up to required temperature. Engine oil insufficient. Checking oil level and add if necessary. Wrong setting of fuel injection pump timing. Set it up as required. Scored or worn pistons. Have pistons replaced. Misaligned or faulty connecting rod. Connecting rod needs to be aligned or changed.

Engine stalls at idle: Low idle speed setting is incorrect. Need to adjust idle speed. Valve out of adjustment. Adjust valve clearance according to specifications. Faulty fuel injection pump. Replace injection pump or repair it.

Insufficient oil pressure: Lack of oil. Add oil to the engine crankcase. Oil pump malfunction. Remove and inspect oil pump. Oil filter element clogged. Replace or service engine oil filter.

New Holland T6.155 Transmission Troubleshooting

Transmission noise: Gears are defective or backlash is improper. Change the gears or set backlash properly. Damaged or worn gear shift forks. Replace defective shift forks. Shaft splines are worn or stuck. Change the shaft. Lack of transmission oil supply. Fill the transmission housing with oil. Bearings are broken or worn. Change the bearings. Transmission oil is contaminated. Transmission oil change required.

Gear shift is hard: Gear shift linkage is worn or rusty. Replace or lubricate the shift linkage. Improperly adjusted or worn clutch. Adjust clutch or change if necessary. Shift forks are bent or worn out. Replace the shift forks. Gearshift mechanism is damaged. Replace or repair the mechanism.

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

External fluid leaks: Seals or gaskets are worn. Replace worn seal or gaskets. Too much fluid in transmission. Excess fluid must be drained.

New Holland T6.155 Hydraulics Troubleshooting

Hydraulic system overheated: Improper hydraulic oil type. The proper type of hydraulic oil must be used. Dirty hydraulic oil. The oil must be changed. Air in hydraulic pipes. Bleed hydraulic pipes. Main relief valve malfunctioning. Relief valve replacement required.

Hydraulic oil pressure is low: Low hydraulic fluid level. Fill up the hydraulic fluid. Hydraulic oil filter is clogged. Clean the hydraulic filter or install new filter element. Leaks in hydraulic pipes. Identify leaks in the system and repair it. Hydraulic control valve is out of adjustment. Need to make adjustment. Hydraulic pump is defective. Replace or repair hydraulic oil pump. Broken hydraulic cylinder. Replace or repair hydraulic cylinder.

Hitch not lifting or hitch lifts slowly: Defective hydraulic pump. Repair or replace hydraulic fluid pump. Main relief valve is defective. Change relief valve. Hydraulic spool valve is damaged. Change or repair hydraulic valve. Hydraulic cylinder failure. Change or repair hydraulic cylinder. Insufficient hydraulic oil. Fill the system to proper hydraulic oil level. Clogged hydraulic fluid filter. Change hydraulic filter element or clean if necessary. Hitch is under excessive load. Load needs to be reduced.

Hitch cannot be lowered or lowering is too slowly: Hydraulic cylinder failure. Repair or replace hydraulic cylinder. Hydraulic control valve block is not set properly. Use the proper setting. Worn lift arm shaft. Install a new shaft. The hitch is not adjusted. The 3-point hitch must be adjusted.

Hitch lift or drop is jerky: Dirty hydraulic oil. The oil must be changed. Hydraulic pump is defective. Change or repair hydraulic oil pump. Air in hydraulic system. Bleed air from hydraulic system. Hydraulic spool valve is damaged. Replace or repair the valve. Hydraulic cylinder malfunction. Change or repair hydraulic cylinder.

New Holland T6.155 Steering System Troubleshooting

Excessive steering wheel free play: Steering column shaft or coupling is worn out. Replace faulty component. Damaged hydraulic steering pump. Repair or change steering pump. Loose or worn steering linkage parts. Inspect and replace as required. Worn or defective hydrostatic steering unit. Repair or change the steering unit.

Difficult steering: Air trapped inside steering system. Bleed air. Steering filter is dirty. Clean or change steering filter. Insufficient steering fluid. Fill up the steering fluid. Hydrostatic steering unit has wear or damage. Repair or change the steering unit. Steering pump stopped working. Replace or repair steering pump. Pump flow control valve is stuck or damaged. Clean or install new control valve. Damaged or incorrectly assembled steering column. Replace steering column or assemble correctly. Front tires wear unevenly. Change the tires. Improper toe-in. Check toe-in and correct. Steering cylinder leaks. Replace scratched piston rod or worn cylinder seals.

Tractor pulls to right or left: Hydrostatic steering unit has wear or damage. Check and replace as required. Worn steering cylinder. Replace or repair steering cylinder. Not adjusted toe-in. Check and adjust toe-in. Worn or loose steering linkage joints. Repair or change steering linkage. Improperly adjusted or worn front wheel bearings. Adjust correctly or change bearings. Tire pressure is uneven. Adjust the tire pressure.

New Holland T6.155 Electrical System Troubleshooting

Battery will not charge: Electrical cable connections are corroded or loose. Tighten or clean electrical wiring connections. Battery terminal connectors are defective. Replace terminal connectors. Battery dead cell. Use a new battery. Loose or defective belt. Install a new belt or adjust belt tension.

Starter motor turns slow: Low battery capacity. Charge the battery. Battery won’t hold charge. Service charging system or replace battery. Disconnected cables or faulty battery terminals. Connect cables correctly or replace terminals.

Starter is not working: Battery is discharged or worn. Battery needs to be recharged or replaced. Wiring is improperly connected or disconnected. Check wiring and connect properly. Low battery output. Charge the battery. Defective starter motor. Repair or install a new starter.