Recharge Vintage AC

[JJHStang]

My 71 Mach1. 5 yr old Vintage AC stopped blowing cold air. May be because I never used very much even living in Texas. I am looking for a good video on recharging myself. I have a Sanden 508 compressor. When I looked at it I see the red cap but the blue cap is missing. I have attached a picture. Any help appreciated.

 

[Steve McMahan]

If it stopped blowing cold air, and the compressor is engaging when you signal AC, it likely has a leak. You might want to consider getting the leak fixed first. Good luck.