Finally some progress A/C is done.

[ddsmith]

Hey Mike,
Good question.

It looks like your compressor is mounted such that the oil filler "cap" is about 90 deg. to vertical.

The Old Air instructions said you could mount it upright or 90 degrees. In my setup that is the 90 degree position. The real problem with the system like this is it trys to puke oil out the hi side port when I remove my gages. Not alot but it does happen. I could rotate it easily to the upright position but I don't like it in that position. I know the problem associated with it in it's current position and have chose not to hook the gage set to the discharge side because I have already seen what I needed to see on the hi side of the system. You will not be adding oil through the plug on the compressor unless the charge is evacuated anyway and I think they were concerned that a small plug leak on the compressor fill port would push out all the oil eventually. This is just my two cents. You'll have to decide on your individual application for yourself. I'm willing to bet the cost of a new compressor on the way I have it installed. Are you? I'm not trying to be a smarta**. I just want everyone to know that there are decisions to be made. You'll be the one making the decisions and living with the outcome. I've got to go because I sound like my mother.