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You see the groove i the flange shown above the spring lever? The armored cable rests in there and a metal friction clamp goes over it to hold the outside of the cable in place, while the inside eyelet is wrapped around the protrusion seen on the spring-loaded valve arm. You are missing the...

https://packardinfo.com/xoops/html/downloads/HOW-TO%20Ranco%20Valve%20Seal%20Replacement.pdf

Much appreciation for your VERY informative reply. I have two of these machines (a 2500ACT and a 3000ACT) both with R-12 fittings and both with pressure in the tanks, albeit of unknown origin. I also have new R-12 and a vacuum pump and manifold gauge set. Looks like these machines will sit on...

There is a book but it is a little confusing. It does have a vacuum pump. Yes, I have (successfully) charged systems before but not with this level of equipment. Thanks for the reply

I am always looking at craigslist ads and along the way I have purchased both a Snap On ACT 3000 AC Recycling machine and a Snap On ACT 2500 AC Recycling machine. They both turn on when plugged in and both have very heavy canisters underneath. All of my cars have factory AC, all still working...

Thanks once again for the instructive comments. I am tempted to see if I can drain the compressor (is there a plug?where?) and observe whether there's any congealed oil. Wish one of you knowledgeable folks lived near: I'd be happy to pay for a lesson in how to use the ACT 2500 as I have 3...

All noted with sincere appreciation. No way of knowing who did (or did not do) this "conversion." I am making the assumption (I know, I know) that it was done by Curly, Larry and Mo's El CHEAPO AC repair. It is also possible that the original schrader valve covers were lost and these were just...

Hello All The 70 Dodge I have has no gas in the ac system. The shrader valve on the high side is covered with a blue cap, usually signifying R134 has been used. However, the fitting on it and the low side is still the same as was the case with R12. I have both gasses. How can I tell if the...