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Compressor lock-up..its causes and prevention

TylerW on Tue June 10, 2008 9:17 PM User is offline

Year: 1978
Make: Pontiac
Model: LeMans
Engine Size: 231

I've had a compressor or two lock up in my time and I've been curious what causes this on the different types of compressors.

My understanding is that most non-sump compressors rely on oil charge held in suspension by the refrigerant for lubrication, but how about sumped compressors like the A6 and Yorks?

Do they operate like an air compressor in that they can pump straight air without an oil charge?

I've seen people use those 2 styles of compressors as auxillary air compressors and while I wouldn't be doing that, it would seem to indicate that these compressors would have superior durability.

Thanks...

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93 Dodge Ram
02 Bonneville
78 LeMans Coupe
78 Century wagon

HECAT on Thu June 12, 2008 11:35 AM User is offline

I have also seen the older sump type compressors used as air compressors (such as for airing up the rock crawlers tires for the road ride home), but most users indicate they are cheap and do regularly die from use in this application.

The number one cause for compressor failure is a low refrigerant charge that eliminates effective oil migration.

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