1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Keep in mind; I am not a HVAC expert. My knowledge is purely anecdotal and I make no guarantees for operator carelessness or damage to your A/C. Most industry literature says to not mix R134 refrigerant in a R12 system. R12 is a chlorine-based refrigerant that uses a mineral base lubricant. R134 is a higher pressure Freon that uses a Synthetic Ester or PAG based lubricant. Introduction of R134 Freon and pag based lubes may damage existing equipment. I was only substituting the cheaper r134 Freon to get the compressor to come on in order to pinpoint the leak for repair. I most likely will begin conversion to an r134 system fairly quickly, which will include a system evacuation, flush to remove any residual r12 and r134 refrigerants, any lubricants and marker dyes-then make the necessary repairs that caused the leak.
In answer to your questions:
1) I assume you try jumpering the leads on the receiver/dryer with the engine running? Or not?
I jumper the leads with the engine running. This may not be necessary, but that's how I've done it. Do this only briefly as you don't want to damage the compressor. This is the primary test for low Freon. Indication that AC problems are not due to a faulty switch or relay. Also, as a first step prior to this, check your fuses.
2) Where/how exactly does one use a can(s) of refrigerant (either R34 or R12) to recharge? Where do you connect this - I assume to one of those 2 screw capped nipples or connectors on the front-facing side of the compressor
Connects to bottom nipple (low pressure) side of system. If you are not sure, ASK at a service station. You don't want to fool with the high pressure side-danger! I had to purchase the r134 adaptor to fit on the compressor. I had the connector hose already from an r134 conversion kit (Interdynamics-KMART etc) I had purchased for about $30 the year before. R134 is about $6 can; R12 is approx $75-125 lb. It was a purely economical decision to use the R134a. I may be risking the compressor in doing this-it’s a calculated risk. So far so good.
, Mon, 21 May 2001 05:03:52, Mon, 21 May 2001 13:32:00
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