shrader valve stem?

[89cherokee]

I read the forum theads about changing over to R134a in my cherokee (89). I purchased the R134a quick connects. When I was getting ready to thread them on I noticed I did not have valve stems in either schrader valve from my R12 fittings. Is this normal? I woudl expect that my R134a will not activate the AC lines without them. Is this an easy item to purchase? Thanks for any help.

 

[89cherokee]

my bad...schrader is spelled with an sch...not sh.

 

[89cherokee]

In case anyone else runs into this problem...schrader valves cost a little under $2. If they're missing, your AC charge will leak out. I still haven't figured out where mine went...and when? But apparently my auto parts place sells a bunch of them.

 

[90Xjay]

Screw in a set and install your new fittings, pull a vacuum and charge her up!

 

[88Wrangles]

Just make sure you use A/C schrader valves...and not the ones for tires

 

[90Xjay]

Just make sure you use A/C schrader valves...and not the ones for tires

Good point!

 

[89cherokee]

I purchased some tire schrader valves at Pep Boys (I needed the valve core tool) and they had a red ring (seal). I purchased 2 AC schrader valves at a parts store and they had a black ring. I would expect that is how you tell the difference...red for tires and black for AC.

 

[90Xjay]

That sounds right, but I have never paid attention to the colors much. But now that you point it out, my spare ones are that way too

 

[88Wrangles]

Ya, and the valve for an a/c system are a lot harder to push down by hand than a tire valve.