AC compressor oil capcities

[ratdude747]

Question:

I'm in the middle of an AC system refresh on my 1995 Ranger and while I wait to see if it will hold vacuum, I realized there is something I might need to know:

How much oil should I add?

I've seen that the stock capcity was 10oz of PAG46. have an 8oz container of pag46 with UV dye mixed in and I also have a similar quantity of PAG100 (which I was using to lube the new O rings with).

I replaced:

-All O rings
-Manifold line (what connects to the compressor)
-Recieiver Dryer
-Orifice Tube

Can I safely add 8 oz of oil? Too much? Too little?

 

[ratdude747]

Ah, never mind. I looked, it wa sonly a few ounces or so. I put what I could in my service line (I really need to get one of those oil tank adapters for next time)... No noises, AC works great (BTW, it held vaccum for 45 mins without the needle moving a hair, yay).

 

[Denisefwd93]

Ah, never mind. I looked, it wa sonly a few ounces or so. I put what I could in my service line (I really need to get one of those oil tank adapters for next time)... No noises, AC works great (BTW, it held vaccum for 45 mins without the needle moving a hair, yay).

Well good that works I was going to ask did you drain the oil out before adding more? Also good that I held the vacuum but vaccum testing rarely works for leak testing.

I recently helped a friend find the leak on by using A holding charge Of r134 and pressure with nitrogen This allowed me to get the pressure high enough to find the leak which was on the compressor seal Nitrogen comes very high pressure and with a two stage regulator We can set it at a couple of hundred pounds Or high enough to blow the hoses apart!

Most shops don't even do it this way, The trouble with using just refrigerant for leak testing is not enough pressure unless it's like 160 degrees outside!