An R-12 based AC system probably has Shrader valves still. A proper
R-134 conversion should have quick disconnect adapters put on.

On Mar 10, 2006, at 7:09 PM, Geza Polony wrote:

> Is there any obvious sign that an R-12 A/C system has been
> converted to R-134?
>
> I bought my 1984 Westy a few months ago without getting any records
> on it,
> and the PO didn't seem to know much about it except the A/C "needed
> to be
> recharged." Meaning, probably, that it also needs to have leaks
> repaired and
> who knows what else.
>
> Anyway, I wanted to fill it full of R-134 and see if I can get the
> compressor to kick on, etc., but am not sure whether the system's been
> converted or not.
>
> No stickers saying one way or the other.
>
> Ideas? Thanks.
>
>
> Geza