A6 Air Conditioning Compressor install, I’m sure I’m making this harder than it needs to be.

[Angelfish]

1982 Mercedes-Benz 380SL.   It uses the good old A6 compressor.

 

 I have a new American made Alama compressor and a filter dryer.  The nuts a bolts of the install is easy enough.

 

What I do know:

The System will be converted to R134

The 380SL uses PAG oil

Compressor says it has oil in it

This compressor was ordered for this car, it’s possible it’s ready to go

 

 

What I thought I knew:

The A6 has a belly reservoir where the oil goes

 

What I found out:

The reservoir has pressure in it

 

What I don’t know:

What's in the pressurized reservoir.  The compressor has a tag so that might be a clue

If I ruined something 

If the oil in it is the right kind and amount 

How to put the right oil into it

How much PAG oil is required in this system 

Anything else about AC compressors, not even terminology 

 

What I did:

Opened the plug to reservoir and released some pressure.  Very quickly, faction of a second.  But some pressure was released.  I thought I was going to open it and find an oil reservoir, either empty or full.
 

I need to get the right amount of the right kind of oil into this compressor with some assurance that I did it correctly.   Bolting it back up is no problem.

 

 

Edited April 15 by Angelfish (see edit history)

[remoteQ]

A good reference for compressor oil capacities is here:

https://cooldrive.co.nz/catalogues/cooldrive-auto-parts-air-conditioning-condensers-evaporators-catalogue

 

Page #639 has info on the A6.

 

System capacities are provided @ Four Seasons in their publication, here:

https://www.4s.com/media/3656/four-seasons-capacity-guide.pdf

 

Hope these offer some help specwise