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John Deere 4640 Problem - Repair methods
The day before I found out a failure on my John Deere 4640. Diesel motor
can not turn over. Tell me please what kind of failure?
Fuel type is incorrect. High-pressure fuel pump is damaged. Check and
repair. Wrong fuel pump timing. Adjust as required.
Somebody help me why my steering wheel rotates very easy? What do I need
to do to correct the situation?
The minimum oil level - It is required to add oil. This is a steering
cylinder malfunction - Make a replacement. Defect in the power steering
pump - Check the steering pump.
I purchased a JD 4640 in march. Now there is damage. Diesel motor won't
start. Could anyone help me determine a source of failure?
Starter does not work - Replace or repair. Fuel pipes are contaminated -
Clean and wash. Dirty fuel filter element - Install new filter. Worn
piston rings - Refit a new set of piston rings.
I use the same model. Yesterday I saw steering wheel turns hard. Explain
to me what is problem?
Low hydraulic oil level in tank. Fill the tank. Leak in hydraulic
connections. Eliminate a defect. Steering pump is defective. Replace the
pump. Power steering is damaged. Replace it.
4640 tractor question. Diesel engine starts hard. Help me please
recognize the reason of problem. What do I need to check?
Clogging in air filter/cleaner. Cold start system worked incorrectly.
Piston rings are wear or deformed. Injection pump drive shaft is
defective. Water in fuel. Fuel too heavy at low temperature.
JD 4640 engine failures. Engine hard to start sometimes. How can i fix
the breakdown?
Clogging in fuel tank vent. Air in fuel system. Restriction in exhaust
pipe. Low voltage - Charge battery. Diesel injection nozzles faulty or
sticking. Filter clogged. Long Idle periods.
Steering does not work on my tractor. How can I fix it?
The hydraulic system has air. You should draw out air. The minimum
hydraulic oil indicator in system. Fill the tank. Steering cylinder has
problems Replace the faulty part.
I am working on the exact same tractor. Why motor failure to start? How
do i fix this defect?
Improper valve timing - Set a valve timing. Bad compression. Cylinder
bores are worn - You must fix it. Leaks between valves and seats - Need
Removal of leakage.
John Deere 4640 malfunctions. This is a diesel motor knock. what kind of
damage?
Lack of oil. Add oil. Cooling temperature is minimum.
I can't figure it out why tractor front axle to howls continuously when
tractor run?
Teeth of gears collapsed. Replace gears. ball bearings crumbled. Replace
it.
I own this model three years. Regularly diesel starting is intermittent.
How to eliminate?
Nozzle is dirty. It is required to check a nozzle. High-pressure fuel
pump is damaged. Do overhaul of fuel pump.
I get the same tractor. Can someone explain to me what's problem if
differential lock broke down suddenly? How to solve the problem?
This is the diaphragm rupture or discs friction clutch worn out. You
have to make repairs.
Our company has 4640 tractor. Engine not starting. I need to know can i
fix the problem?
Most likely fuel filter element has dirt. Otherwise injection pump is
improperly adjuste.
Please help. Engine overheats regularly. What kind of malfunction?
Low coolant level. Fill radiator to proper level, check radiator,
coolant recovery tank, and hoses for loose connection or leaks. Dirty
radiator core, or grille screens. Remove all trash. Engine overloaded.
Shift to lower gear or reduce load. Loose or problem fan belt. Adjust
belt tension.
My friend has JD 4640. Today he heard knocking in the rear axle housing.
What's wrong?
All symptoms talk about destruction of bearings.
Help with the question what defect if motor white exhaust smoke?
If white gas comes from the exhaust pipe you required to replace piston
rings urgently.
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- ALL MODELS
- JD 2955 - How to troubleshoot possible problems
- JD 3032E - Troubleshooting Issues
- JD 3036E - Troubleshooting Tips
- JD 3040 - How to eliminate malfunctions
- JD 3050 - How to solve problems
- JD 3130 - Problems and Solutions
- JD 3320 - Problem solving questions
- JD 3520 - Problem solving tips
- JD 3650 - Problem solving assistance
- JD 3720 - Repair assistance
- JD 4020 - Problems and repair
- JD 4050 - Breakdowns during operation
- JD 4200 - Operation problems
- JD 4250 - Repair methods
- JD 4320 Issues - Owners questions
- JD 4455 Trouble - User questions
- JD 4520 Issues - Repair assistance
- JD 4650 Trouble - Repair tips
- JD 4755 Problem - Troubleshooting assistance
- JD 4955 Issues - Repair tips
- JD 5050D Problem - Repair assistance
- JD 5055E Problem - Repair tips
- JD 5075E Trouble - Repair assistance
- JD 5090R Issues - User questions
- JD 5100M Problem - Owners questions
- JD 5115M Troubleshooting Tips
- JD 5410 Troubleshooting Issues
- JD 5525 - How to troubleshoot possible malfunctions
- JD 5720 - How to troubleshoot possible problems
- JD 6105R - Major failure and repairs
- JD 6115M - How to fix the problems
- JD 6125R - How to repair breakdowns
- JD 6140R - Problem solving
- JD 6150M - Problems and Solutions
- JD 6155R - Common problems and repairs
- JD 6190R - Repair issues
- JD 6210R - Repair tips
- JD 6220 - Problem solving assistance
- JD 6320 - Troubleshooting assistance
- JD 6420 - Operating problems
- JD 6520 - Operating faults
- JD 6630 - Repair methods
- JD 6820 Problem - Troubleshooting Tips
- JD 6910 Problem - Repair methods
- JD 6930 Problem - Troubleshooting assistance
- JD 7200R Issues - Repair methods
- JD 7230R Problem - Repair assistance
- JD 7310R Problem - Repair tips
- JD 7430 Trouble - Repair assistance
- JD 7530 Issues - User questions
- JD 7610 Problem - User questions
- JD 7720 Troubleshooting methods
- JD 7810 Troubleshooting assistance
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