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New Holland TT55 Troubleshooting

New Holland TT55 Engine Troubleshooting

Engine starts hard or doesn't start: Dirty fuel filter. Service the filter. Air in fuel tank. Bleed fuel tank. Fuel injection nozzles fault. Check injection nozzles and replace if required. Defective fuel injection pump. Replacement or repair required.

Engine stalls while running: Incorrect adjustment of fuel injection pump timing. Adjust the pump as required. Clogged fuel filter. Clean or replace the filter. Engine is cold. Engine is not warmed up to the required temperature.

Diesel starts but immediately shuts off: Fuel filter plugging. Replace the filter element. Faulty fuel injection pump. Repair or install new pump. Clogged air filter. Change air filter element.

Engine overheats: Clogged radiator fins or leaking radiator cap. Clean radiator or replace cap. Engine coolant is insufficient. Fill the cooling system and check components for leaks or other faults. Loose or defective fan belt. Change as required. Engine oil level is insufficient. Checking oil level and add if necessary.

Engine lacks power: Fuel injection nozzles are damaged. Inspect nozzles and replace if necessary. Dirt in the fuel hoses or lines. Fuel hoses and lines must be clean. Air filter is clogged. Clean or change. Cylinder head gasket is worn. Change cylinder head gasket.

Abnormal engine noise or knocking: Coolant temperature is low. Warm up engine as required. Insufficient engine oil. Check oil level and add oil as required. Fuel injection pump timing is not adjusted. Set up as recommended. Pistons are scored or worn. Pistons replacement required. Connecting rod is misaligned or defective. Connecting rod needs to be replaced or aligned.

Engine stalls while idle: Incorrectly set low idle speed. Correct low idle adjustment. Valve clearance is wrong. Adjustment procedure required. Fuel injection pump damage. Change pump or rebuild it.

Insufficient oil pressure: Engine oil insufficient. Add oil to the engine crankcase. Worn oil pump. Remove and inspect oil pump. Clogged oil filter. Clean or replace engine oil filter element.

New Holland TT55 Transmission Troubleshooting

Transmission noises: Damaged gears or incorrect backlash. Change the gears or set backlash properly. Worn or bent shift forks. Change defective shift forks. Shaft splines are damaged or worn. Install a new shaft. Transmission oil insufficient. Check transmission oil level and add oil as required. Bearings are damaged or worn. Bearings need to be changed. Transmission oil contamination. Transmission oil change required.

Gears are hard to shift: Gear shift linkage is rusty or worn. Lubricate or replace the shift linkage. Clutch is worn or not adjusted. Adjust or change the clutch. Damaged or worn gear shift forks. Change defective shift forks. Defective parts in the gearshift mechanism. Replace defective parts.

Insufficient transmission oil pressure: Transmission fluid insufficient. Add fluid to the transmission housing. Plugged transmission oil filter (if equipped). Clean or change transmission oil filter. Relief valve failure. Replace relief valve.

External fluid leaks: Seals or gaskets are broken. Change defective seal or gaskets. High transmission oil level. Correct the oil level.

New Holland TT55 Hydraulics Troubleshooting

Excessive hydraulic system heat: Improper hydraulic fluid type. Use the proper type of hydraulic fluid. Contaminated hydraulic fluid. Change hydraulic fluid. Air in hydraulic system. Bleed air from hydraulic system. Main relief valve is defective. Relief valve replacement required.

Insufficient hydraulic fluid pressure: Low hydraulic fluid level. Fill up the hydraulic fluid. Hydraulic oil filter element is clogged. Install a new hydraulic filter element. Leaks in hydraulic pipes. 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 failure. Repair or replace hydraulic fluid pump. Broken hydraulic cylinder. Repair or change hydraulic cylinder.

Hitch does not raise or raises very slowly: Hydraulic pump is defective. Change or repair hydraulic fluid pump. Main relief valve is defective. Relief valve replacement required. Damaged hydraulic spool valve. Repair or replace the valve. Hydraulic cylinder is defective. Replace or repair hydraulic cylinder. Insufficient hydraulic oil. Need to add oil. Dirty hydraulic fluid filter element. Install a new hydraulic filter element. Excessive load on hitch. Load needs to be reduced.

Hitch fails to drop or drops slowly: Faulty hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic control valve block is out of adjustment. Control valve needs to be adjusted. Damaged hitch cross shaft. Install a new shaft. 3-point hitch is out of adjustment. The three-point hitch must be adjusted.

Hitch drop or lift is jerky: Hydraulic oil is dirty. Hydraulic oil change required. Hydraulic pump failure. Repair or replace hydraulic fluid pump. Air trapped in hydraulic system. Bleed air from system. Hydraulic control valve block is damaged. Change or repair hydraulic valve. Defective hydraulic cylinder. Repair or install a new hydraulic cylinder.

New Holland TT55 Steering Troubleshooting

Steering wheel free play is excessive: Steering column coupling or shaft is worn. Change faulty part. Steering pump failure. Steering pump needs to be replaced or repaired. Loose or worn steering linkage components. Inspect and replace as required. Power steering control unit has wear or malfunction. Check and replace as required.

Steering is stiff: Air in steering hydraulic system. Need to bleed air. Steering filter element is clogged. Change steering filter element. Low steering fluid level. Fill the steering system with fluid. Power steering control unit has wear or damage. Inspect and replace as required. Steering pump is faulty. Check the hydraulic steering pump and change if necessary. Steering pump control valve is faulty or stuck. Service or change control valve. Improperly assembled or defective steering column. Reassemble or change the steering column. Uneven wear on front tires. Replace the tires. Improper toe-in. Check and adjust toe-in. Steering cylinder leaks. Damaged cylinder seals or worn piston rod.

Front wheels wander to left or right: Worn or defective power steering control unit. Change or repair steering unit if required. Steering cylinder failure. Repair or replace hydraulic steering cylinder. Not adjusted toe-in. Adjust toe-in wheels. Steering linkage assembly is worn or loose. Check and change as required. Incorrectly adjusted or damaged front wheel bearings. Change or adjust the bearings properly. Uneven tire pressure. Inflate the tires properly.

New Holland TT55 Electrical System Troubleshooting

Battery cannot be charged: Corroded or loose wire connections. Tighten or clean electrical wiring connections. Faulty electrical terminal connectors. Change terminal connectors. Defective battery. Change the battery. Worn or loose belt. Belt needs to be adjusted or replaced.

Starter turns slowly: Low battery output voltage. Battery needs to be recharged. Battery is draining quickly. Service battery or replace it. Battery cables are disconnected or terminals are faulty. Check cables and clean or change terminals.

Starter doesn't crank: Battery is discharged or worn. Recharge or replace battery. Battery cables are disconnected or improperly connected. Inspect cables and connect properly. Low battery output. Battery is drained, charge it. Starter motor failing. Repair or replace starter.