I am replacing most of the A\C components in my 1990 Dakota 3.9 L. I purchased the kit that includes a compressor, drier/accumulator, expansion valve, oil, and gaskets. The gaskets include a small green O-ring, however, I have not found an O-ring anywhere in the system. Does anyone know what this is for? I'm trying to get it right the first time!
Any help would be appreciated.

Rick Bale
Hawthorne NJ

 

Just a guess, but maybe the low pressure switch?

 

That kit fits several different vehicles; I thought it was a left over on my truck.

(That green O-ring was too big for the low pressure switch on my 1988; might be for if the switch is in the thermonic expansion valve instead of on the line, though.)

RwP

 

That's it. Boy. it sure had me stumped.
Thanks for your help!

 

No, he's right, It is the right size for mine.