________________________________________________________________________________

New Holland 6640 - Adjustments and maintenance

The day before I discovered a failure with my NH 6640. Engine can not turn over. Tell me what kind of issue?

Wrong type or grade of fuel used. The injection pump is broken. Check and repair. Wrong fuel pump timing. Adjust if necessary.

New Holland 6640 problems. Engine loses power. How should I correct the situation?

Worn piston rings and valve guides. Replace them with new ones. Wrong fuel injection advance angle. Set the recommended injection advance angle.

Tell me what is defect if irregular engine running?

Air in fuel system. Bleed air from system. Fuel tank vent restricted.

6640 tractor failure. Transmission rough shifting. What happened?

Excessive clutch pedal free travel - Adjust free travel.

Somebody help me why my steering wheel rotates without resistance? What do I need to do to get rid of problem?

Low Oil Rating - Fill the tank. The steering cylinder is heavily worn - Perform repair. Steering pump have worn - Install a new pump.

I got a New Holland 6640 in november. Nowadays there is problem. Engine not starting. Could anyone help me determine the cause of issue?

Starter speed is slow - Change or restore. Fuel pipes are contaminated - Wash and clean the fuel line. Fuel filter is dirty - Renstall filter element. Worn piston rings - Change piston rings.

I have the same model. Recently I noticed steering wheel turns hard. Somebody tell me what are possible malfunctions?

Low hydraulic oil level in tank. Air in steering hydraulic system. Air-bleed steering system. Bent spindle arm. Leak in hydraulic connections. It is necessary to fix a defect. Steering pump is worn out. Repair the pump. Power steering is damaged. Replace it.

6640 tractor trouble. Diesel motor is hard to start. Need help to determine the reason of failure. What needs to be repaired?

Loose or corroded electrical connections. Plugged fuel filter. Remove Air Filter and clean. Cold start system used incorrectly. Damage or wear of piston rings. Defective fuel pump drive shaft. Water in fuel. Crankcase oil too heavy. Use oil of proper viscosity.

NH 6640 diesel malfunctions. Diesel engine long starting permanently. How could i fix a failure?

Restricted Fuel Lines. Air in fuel system. Restriction in exhaust pipe. Low voltage - Charge battery. Dirty or faulty injectors. Filter clogged. Fuel shut-off valve closed. Open fuel shut-off valve.

Steering stopped working on our tractor. What's a breakdown?

The hydraulic system has air. You need release air from system. Hydraulic oil small indicator in the tank. Fill the tank. Problem with the hydraulic steering cylinder Change the seal.

I am working on the exact same tractor. Why diesel engine doesn't start? How can i fix a failure?

Incorrect valve timing - Make adjustment. Compression increase. Worn cylinder bores - You must fix it. Leaks between seats and valves - Remove leaks.

6640 tractor breakdowns. This is a diesel knock. what kind of damage?

Lack of oil. Fill with oil. Coolant temperature dropped.

I can not understand why front axle to make a lot of noise chronically while driving?

Defective gear. It is recommended to replace the gear. ball bearings crumbled. You need to change it.

I have this tractor about 5 years. Recently, diesel start is difficult. How to get rid of this?

Nozzle is dirty. It is required to inspect injector. The fuel pump has a breakdown. Replace injection pump.

I get the exact same tractor. Answer my question why differential lock broke down swiftly? How to solve the problem?

Diaphragm damaged or replace friction clutch discs. You have to make repairs.

I'm using New Holland 6640. Motor not starting. Tell me what is the fault?

Probably this is a clogged fuel filter. Or high-pressure fuel pump to lost adjustments.

Please help. Motor overheats regularly. What could be the problem?

Low coolant level - Fill coolant and check cooling system for loose connections or leak. Low oil - Replace the oil to correct grade. Oil level is less - Top up to level. Overloaded - Reduce the load. Running out of engine oil - Add engine oil. Engine overloaded. Shift to lower gear or reduce load. Loose or problem fan belt. Adjust belt tension.

My brother has NH 6640. Two days ago he heard knocking in the rear axle. What is the malfunction?

All sounds point to damaged bearings.

Help with the question what is defect if diesel white exhaust smoke?

When white smoke comes out of the exhaust pipe you required to carry out replacement of piston rings urgently. Air filter blocked. Clean or replace as per maintenance schedule.