Looks to me you're not pumping very much refrigerant. 60 & 110 @2000. Ambient is a littlew low but think if working correctly you would see a range closer to 35 & 200 @ 2000 RPM.

Thanks Tim, I will update my bookmarks. That IS a better unit. Both fittings and the adapters stay with the unit - Nice! You know the game. Vendors always swapping brands and increasing prices. Everyone has a knock-off to offer which is good sometimes. For tools and such. Still try and stay with Ma...

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Same thing fr5om different vendor. Little better quality.

https://www.ackits.com/side-mount-can-t ... rch=MT1036

It is odd but happens when a seal will hold under vacuum and leak under pressure or the other way around. Just the type of pressure placed on the seals. As stated the first step is a solid leak test.

Ice.

It was so long ago all I remember is pushing around a york with an electric swamp cooler motor. You have to remember, I'm still a kid today! LOL

Somewhere on the old site I posted a picture of an FS6 that would pump down to 800 microns on the suction side - with the discharge open to atmosphere. I was only turning that FS6 about 250 rpm too. I would trust the York if it was in good shape. But a tired hermetic from a discarded refrigerator i...

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bohica2xo wrote:Fast Forward to the 11 minute mark to see the water boil off.

sure shows the shortcoming of scrap refrigerator parts as vacuum pumps too!

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many years ago my Dad had a York compressor as a pump.

Popped up on a Facebook page. Showing what a good vacuum will do to moisture in the system.

https://www.youtube.com/watch?v=BeiW_37rS-U

philipswanson wrote:Does your manifold/gauges take special o rings other than the a/c system itself?

I know Mastercool has specific o-rings.