Now, I'm vaccing on the narrow tube (liquid) port and using that small hex-key valve.
I changed the hose config around, so the micron meter was off a 'T' on the vac pump.
The meter seems to be steadier now and the vacuum seems better.
I just got the system down to under 300 microns in about 30 minutes.
(After changing the pump oil).
You are right on about the valves.. I can turn the Hex-key and see very little,
if any change when the pressure is up around 500-600.
But, down at 300, it's very visible. I can turn the hex-key a 1/4 turn
and the loss pops right up.. It went up near 400 as I played with it..
So, I'm just gonna hafta be happy with 200-300, and put some Refrigerant in,
before anything leaks down, so I'll have Positive pressure inside the unit.
Once it's got positive pressure, those service valves should be fine..
They are turned all the way out to their stop-seals, and capped over for good measure..
