Automotive Air Conditioning Information Forum (Archives)

themow on Tue December 06, 2011 9:54 PM

Year: 98
Make: jeep
Model: cherokee
Engine Size: 4.0
Refrigerant Type: 134

Pulley bearing has been making some noise on my sanden 4691. I went ahead and ordered a new bearing pulled the pulley off and pressed out the old bearing and the new one in. I havent reinstalled yet due to rai but had an idea and wanted to run it by some in here. The compressor is working properly cooling as it should. My question is what would have caused the bearing to go bad. The front seal of the bearing was half gone but it still spun albeit rough. The rear of seal was fine. If the compressor was low on oil and heating up, would it have caused the bearing to go bad? Im just thinking this may be a sign of another problem. Also does the pulley need to be pressed back on? if so whats a good way to do it while the compressor is still in the car? Thanks

chris142 on Tue December 06, 2011 10:00 PM

Sometimes the bearing just fails/ wears out. Often the compressor is locked up which overheats the hub and bearing then the bearing fails.

emsvitil on Wed December 07, 2011 2:26 AM

A slipping clutch or clutch coil shorting out (high heat) can cause the bearing to go.

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Ed
SoCal

themow on Wed December 07, 2011 3:27 PM

I will test the coil and maybe remove a shim on the clutch and resurface it slightley. Any tricks for pressing the pulley back on while the unit is in the car?
Also any way to check the oil level of the compressor?