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a/c compressor,what was wrong

R

rrlund

Well-known Member
I got that new compressor put on the tractor. Got it recharged,blowing good and cold.
I put the old one on the bench and tore it apart to see what was going on. When I recharged it last week,I could hear it hissing in back where I couldn't see. I also noticed the bolts where it mounts to the bracket were loose. Well,they were So loose that the head of the bolt wore through the case of the compressor. It wore right in where the backing plate mates up to the case. I think the "rattling" I was hearing was the sound of air escaping when the piston right there was coming up. They all seem to be coming up alright,nothing is ruined on the inside,so there isn't any shavings or anything.
I'm HOPING that's all there is to it and it's gonna keep working. Sure feels good in there right now.
 
Good deal, that means you don't have to deal with removing a load of metal trash from the system.
On an AC repair site I use, the "Experts" who make their living repairing AC systems, said that on a R12 to R134a conversion, you may under some conditions be better off if you do not flush the system.

The thinking at that time was, that if a compressor has failed and loaded the system with metal trash, you have no choice but to flush the system.
The other side of it was that if the compressor is in good shape, the system will be relativly clean. In that case, the interior of the old non barrier hoses are pretty well sealed by years of mineral oil flowing through them, making it much easier to keep R134a in the system, as that old oil impregnated rubber makes a pretty good stopleak.
Flushing the system removes some of that old mineral oil from the hoses and can make them more "leaky" when R134a refrigerant is used.
 
Down right cold actually. You know how hot it is out there today. Been hauling manure all afternoon and you could hang a side of meat in that thing.
 
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