________________________________________________________________________________

Ford 6640 Tractor Troubleshooting

The day before I got a malfunction with my Ford 6640. Engine will not crank over. Tell me please what could be the trouble?

Wrong type or grade of fuel used. Defective high pressure fuel pump. Check and overhaul. Wrong fuel pump timing. Adjustment required.

6640 tractor breakdowns. Low engine power. How do I troubleshoot it?

Governor defective. Incorrect timing of fuel jet Have it repaired by the service representative. Leaking valve seat.

Tell me what is damage if engine stalls?

Water mixed in the fuel - Remove water and replace with light oil.

Ford 6640 SL issue. Transmission rough shifting. What's the reason?

Shifter forks, rods, or other transmission gear selection components damaged.

Here is my question - why my steering wheel turns around without resistance? How do I act to get rid of problem?

Minimum Oil Rating - Top up the oil. Steering cylinder has damage - Change the seal. Steering pump have worn - Replace pump.

I got a Ford 6640 2WD in july. Nowadays there is problem. Motor won't start. Can anyone help me find the cause of breakdown?

Starter does not work - Inspect the starter and install a new as required. Fuel line is clogged up - Clean and flush. Dirty fuel filter element - Change the filter. Piston ring failure - Change piston rings.

I use the same tractor. Yesterday I saw steering wheel is hard to turn. Tell me what is a breakdown?

Minimum Oil Rating. Steering pump malfunction. Steering pump broken. Repair tie-rod. Leak in hydraulic connections. Eliminate the problem. Steering pump is worn out. Install the new pump. Power steering is damaged. Replace it.

6640 tractor question. Diesel engine is difficult to start. Need help to find prime cause of trouble. What can I do?

In winter, oil viscosity increases, and engine cranks slowly. Cold start system worked incorrectly. Broken or Worn Piston Rings. Valve Leakage/Adjustment Bad. Water in fuel. Crankcase oil too heavy. Use oil of proper viscosity.

Ford 6640 motor failures. Diesel hard to start sometimes. How do i fix the breakdown?

Restricted Fuel Lines. Air Leaks in Suction Lines. Clogging in exhaust pipe. Low voltage - Charge battery. Injection fuel is little or the spray is not excellent. Clogged fuel filter. Clean or replace fuel filter. Long Idle periods.

Steering doesn’t function on our tractor. What is problem?

The air is in hydraulic system. We recommend you draw out air. Small level of oil in system. Top up the oil. Possible malfunction of hydraulic steering cylinder Change the seal.

I own the same tractor. Why engine has not been started? How can i fix the breakdown?

Valve timing is improper - Make adjustment. Compression increase. Cylinder bores are worn - Need overhaul. Leaks between seats and valves - Eliminate leak.

6640 SL tractor problems. I hear a diesel knock. what kind of issue?

Oil of small quantity. Fill up. Coolant temperature is low.

I can not understand why front axle to howls incessantly at the moment of motion?

Teeth of gears collapsed. Replace gears. Roller bearings are firmly erased. Fit new bearings.

I own this tractor about four years. Often motor start is very difficult. What you need to fix?

Injector is clogged. Need to diagnose a nozzle. High-pressure fuel pump is not working. Replace injection pump.

I bought the exact same model. Can someone explain to me what's problem if locking differential breaks down immediately? How to solve the problem?

The diaphragm torn or wear of discs friction clutch. Requires repair.

I have Ford 6640 SL. Diesel engine not starting. Help me what is problem?

Most likely fuel filter clogged. Otherwise the fuel pump to lost adjustments.

Please help me. Diesel constantly overheats. What kind of malfunction?

Lack of coolant - Refill with coolant. Radiator cap faulty - Replace with new one. Radiator core clogged - Clean radiator core. Radiator screen clogged - Clean screen. Excessive load - Reduce load or speed. Fan belt is damaged. Change as required.

My father has 6640 2WD tractor. Yesterday he diagnosed a noise in the rear axle housing. What problem tell me?

These sounds evidence of bearing problems.

Help with the question why diesel engine emits white smoke?

When white gas visible from exhaust pipe you required to replace piston rings immediately. Insufficient fuel delivery. Shortage of or faulty fuel.

FORD TRACTORS TROUBLESHOOTING
1710	1900	2120	2600	3600
3930	4100	4630	5600	5640
6410	6610	6640	6710	6810
7610	7740	7810	8210	8240
8630	8830	8770	TW30	TW35