I had no idea that a Sanden would have isolation valves like a York. Those were the good old days. I liked the manual isolation valves; I installed that used compressor and only lost a tad of R-12. I used a 1/4-inch socket upside down, using a L-shaped allen wrench to turn the socket on the 1/4-ich...

Post both high and low side pressures at about 1800 rpm after a couple of minutes.

What year Nissan Cube, and R134a? Electric radiator/condenser fans or fan clutch?

Even though this site's software won't "remember me", I do remember that my 1984 V6 Jeep Cherokee had a Sanden compressor. When it seized in the early 1990s, and compressors were for this were like $700 and unavailable at that time, someone offered to swap the rear plate to a new/different...

fhorta wrote: ↑Fri May 28, 2021 9:17 pm Also, do i have to get the service valves with the manual valves? The system was retrofitted with R134a fittings which have the schrader valves. The manual valves would no longer be needed, right?

I'm not a pro, but I think if you had schraeder valves that you would not need manual valves.

On my 1984 Jeep Cherokee there were NO schraeder valves, if I remember correctly. The manual shut off valves simply either closed off either the compressor or the threaded fittings. Once I replaced its compressor with a used unit, and did not lose the remainder of its R-12 because I had the compress...

I drained the oil out of the comp, it is orange and has a sweet smell. Is there any way to easily determine if it is mineral or something else? solvent test? When I was working, I could use FTIR spectroscopy to tell in 5 minutes whether the recovered oil was a non-polar R-12 mineral oil or the more...

pull a vacuum in the normal manner, and charge into the vacuum through the low side with gaseous refrigerant using an accurate refrigeration scale? It'll only take a few minutes, and the compressor won't engage anyway until you have sufficient refrigerant in the system. I'm NOT an AC professional, ...

I myself observed a related/unrelated event about 4 decades ago on my sister's Datsun truck: The rubber fuel line to the mechanical fuel pump had a pinhole, so the fuel pump could not pull a vacuum, would just suck air through the pinhole. But no fuel ever leaked out that rubber fuel line. Funny too...

Desiccant won't give up its trapped moisture to vacuum during evacuation. Use nitrogen or a can of R134a for leak detection by bubbles, electronic sniffer, or UV dye. Hi, I see guys on U-Tube, using shop air and a soap bottle to find leaks in Auto AC Units. Yeah, and I see guys on YouTube riding bic...

WilliamK1974 wrote: ↑Tue Apr 27, 2021 12:30 pm I hooked up a set of manifold gauges, and they showed that the low side would either be at zero or pulling a vacuum, and that the high side could go up close to 300.

To me, this is the biggest clue.

And note that sight glass is really not too useful on 134 systems.