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ready to try and charge my system (1st time) help

trsmec on Sat September 22, 2007 3:11 AM User is offline

Year: 1986
Make: toyota
Model: p/u
Engine Size: 22r
Refrigerant Type: r12
Country of Origin: United States

ok i ended up with this older white 01016 a/c service machine .
i have pulled my system in to a vacuum of between 26-30 inhg
and it has held for over 24 hours so i am thinking no leaks at this time!
to refill the system oil i used the vacuum pump to pull in the requred 7 ounces
of oil . my machine came with few instructions and where written as if i had
a 30lb cylinder of r-12 with a single valve . but the machine i got has
(what i think is ) a recovery tank looks like a 5 gallon propane tank
but has 2 valves a red valve and a blue valve...i do know the tank has
good r-12 in it but my question is it has 2 valves so how do i charge with it
what do i turn on 1 or both valves .
please remember this is my 1st time i did get the certiificate so i can hanld the
r-12. and if you look at my last post it has a link to the instructions for the
machine i have .
but again if some one could just walk me through the charge process
with the tank i have it would be a lot of help

thank you for your help

Edited: Sat September 22, 2007 at 10:33 PM by trsmec

JJM on Sat September 22, 2007 12:15 PM User is offline

I'd be willing to bet that most, if not all, of the 7 oz of oil went right into you're vacuum pump. The oil should've been added directly to the system while it was opened.

I would not attempt to charge the system at this point for fear of destroying the system from lack of oil.

Unless you've got a refrigerant identifier, I wouldn't attempt to use the recovered R-12; use the virgin R-12 from the 30 lb tank.

I don't know the specifics of the machine, but it should be fairly easy to figure out. If in doubt, close off the valve for the recovery tank, and just make sure the system is under vacuum when you pull in the R-12. Then close off the high side and charge the rest of the way through the low.

But PLEASE do not charge until the oil level is verified - even if it means pulling the compressor and flushing the system dry. When the system is dry, pour the oil in the system, with most of it going to the compressor.


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trsmec on Sat September 22, 2007 10:41 PM User is offline

I Did add over half the oil with the system open,
i also checked the hoses after pulling the oil in
the hose(used on the pump) and it was still dry
so it is my thinking that it did not get pulled in
to the vac. pump.

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