Thursday, November 24, 2011

How to inspect Vehicles A/C Compressor and Clutch?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

An electromagnetic clutch used to engage and disengage the compressor, to turn the air conditioner on and off.

There are several things that can go wrong with a compressor. They can leak from the front shaft, from seals on the case, or from O-rings on the back. Sometimes, the aluminum tubing that supplies the back of the compressor develops a leak.
(a) O-rings on the back of a compressor. (b) An aluminum tubing manifold. Courtesy of Everco Temp Control.
There are hundreds of configurations of these. Aftermarket companies produce them and have catalogs listing them by number. Some mufflers have a filter that must be replaced in the event of a compressor failure. When you replace one compressor with another, it is important that the correct one be used. Be sure you have the correct part number. On the GM radial six-cylinder compressor there are twelve different part numbers. The difference is in where the compressor is mounted. It is important that the correct mounting be used so the oil passage is in the right place.
On orifice tube systems, oil is pulled up from the bottom of the receiver dryer. If the refrigerant level gets too low or if the oil hole gets plugged, the compressor can fail. Rebuilders recommend replacing the accumulator with every compressor replacement. This is because they do not want to take a chance that the oil hole is plugged and the newly rebuilt compressor will fail due to lack of lubrication.
Check the operation of the clutch. You should hear the loud click of the clutch as it engages periodically. Electric cooling fans should begin to run at low speed when the clutch comes on. Check wiring and hoses for obvious problems.
When clutch engagement problems occur, check for voltage from the source. Then use a jumper wire to apply power and ground to the terminals on the clutch. This will bypass the protection devices and determine whether the problem is the clutch or the circuitry. Parts of the clutch and compressor are shown below.


For car AC related and Heater related solutions. You can refer the options mentioned below:---

Car AC Blows Warm Air ?

How to test AUTO AC pressure?

AUTO Air Conditioning Troubleshooting?


Fixing refrigerant leak?

How to locate Car AC Refrigerant leak?


What causes INTERMITTENT COOLING on Car AC system?

Car AC making Noise?


How to Recharge Car's Air Conditioner

For details regarding:--

How does Vehicles Engine cooling system works?

Engine cooling components working?

How to flush cars radiator?


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