New guy, new problem! Help

Whatsup fella's. I'm a in a "in house" HVAC-R dept. at a steel mill. Anyway, I'm still new to the field. Anyone with less than 3 yrs exp. is new actually. Well, today I was pulling a vacuum on a unit and all seemed fine. Vacuum held passed 30. I'm ready to charge. I takeoff the yellow hose from the pump and install it on the R-22 tank. As I open the tank, I go to purge the line and oil started to spit out. :eek:. I don't think oil got into the system because I closed the manifolds before I stopped the vacuum. But where did the oil come from, and why? Any help woould be great.

Could be vacuum pump oil.
Did you blank off the pump and then turn it off or the other way around?

No I turned it off last. It felt like pump oil.

are u sure the pump went off?

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Definately went off, but maybe it shoulda been quicker. I'm changing out a compressor tomorrow so I'll see what happens then. Today was pissin me off with these friggin accustat bulbs combined with delay on break timers, both compressors seem to be short cycling. Not dangerously short but enough to know its not right.

This should be in another forum. Try the pro tech forum or the residential forum.

What he said and then we can talk about the finer points of a micron gauge as well :)