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Date:         Tue, 20 May 2008 13:50:49 -0700
Reply-To:     Robert Fisher <garciasghostvw@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Robert Fisher <garciasghostvw@GMAIL.COM>
Subject:      Re: rebuilding a/c compressor??
In-Reply-To:  <vanagon%2008052015310639@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=ISO-8859-1

I read an A/C service manual that said essentially to detach the compressor, take out the plug/bolt, turn it upside down, rotate the shaft several times and let it drain. After it appears to be done, rotate the shaft again and see if anything else comes out; if it doesn't you can consider it drained, and then you add the correct amount of oil (just for the compressor) that the specs call for. I haven't tried it myself, yoyo/ymmv.

Cya, Robert

On 5/20/08, Roger Sisler <rogersisler2000@yahoo.com> wrote: > > You have to kinda gustimate how much oil to put into your old > compressor.Got > oil stains and accumulated dirt around the compressor(leaking oil attracts > this dust)?? Same for the hose connections? Unknown history??Was your > system ever so low the low pressue cut off switch shut the system down?? > More than once, you say! Stick about 2 ounces in for good measure, anyway. > Won't hurt nothin'. The oil that leaves the compressor seems to wind up in > the evaperator. If the compressor is making a racket and, a shot of oil > quiets it down maybe add a bit more. > > In early Vanagons, VW satisfied the lack of a low pressure cut off switch > by > adding a sentence to the owners manuel- "Be sure to take your Vanagon to > the > dealer and have the A/C system checked out before each cooling season". It > is the loss of refrigerant pressures that cause the oil to leave the > compressor. I guess this didn't work,so they added the switch in '86. > > The Sanden web site shows how to make a dip stick to measure, but got to > discharge your system and remove the compressor from its mounts--first. If > you want to do it right. Maybe www.sanden.com > > Once , I went to an A/C speciality shop and picked the owners brain. When I > asked which tools (and how hard) were needed for changing out the clutch > /pulley, he answered that he had never done it before. He said that he > changes the compressor. Nobody he was aware of changed the clutch pulley. I > think it was a $$$$$ issue, and when it is 98 degrees and humid, few would > complain. > > I say to get the Bus Depot compressor because their supplier is the best. > New compressors have a shelf life of 18 months. If they are not installed, > they are junk. The shaft seal has shrunk up and will leak. This supplier > knows that and stands behind all his compressors. He calls them back and > will ( he changes clutch/pulleys)put in a new seal. >


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