Keith, I would like a copy of the instructions as I am going to install all new R34a conversion components from Old Air Products. The pump from Harbor Freight is a venturi pump, works like a carb. Attach a LARGE capacity compressor and the venturi effect creates the vacuum. I have one and it works fine for the few cars I do. Bob Walton [EMAIL PROTECTED] Maryland Chevelle Club
----- Original Message ----- From: "Keith Cooper" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 13, 2002 6:14 AM Subject: Re: Re:[Chevelle-List] Keith A/C > Rick, > Thanks!. I think that amount must be right. He told me that I would need 11 > oz of oil. He said add to compressor and put the rest in the condenser,etc. > So you must be right. On the expansion valve here is what was said: These > types of valves, although efficient, have some disadvantages over orifice > tube systems. Like orifice tubes these valves can become clogged with > debris, but also have small moving parts that may stick and malfunction due > to corrosion. > If anyone wants the vacuum down instructions he gave me, email me or I can > post it on the list. His instructions were very detail and different from > how I have vacuum down in the past. I have always put the vacuum unit on the > system for about two hours and then charged, but this is not how he > instructed me. > ON Harbor Freight Tools site, they have an Air Vacuum Pump which only sells > for $10.00. This seems too cheap. Electric units usually sell for > 150.00-350.00. Here is the page on Harbor: > http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=3952 What > do you guys think?? Is this junk?? What do I need to look for in a vacuum > unit. I just want one good enough to do my cars only. I am not wanting to go > into the a/c business. > > ----- Original Message ----- > From: "rick schaefer" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, June 13, 2002 1:34 AM > Subject: Re:[Chevelle-List] Keith A/C > > > > Keith info from a 72 Chevrolet Service Manual: > > > > Freon - 3 lbs 12 oz > > oil - 11 oz > > > > These are for 72, but I'm sure 71 is extremely close. > > > > BTW - Standard conversion for R134a seems to be 80% of the R12 charge. > So 60oz * .8 = 48 oz of R134a. > > rick > > > > > > rick schaefer > > 72 El camino > > http://members.home.net/jimmy4/rick1972elky.html > > ACES #00140 > > Team Chevelle #00038 > > > > > > ----------------------------------------------------- > > To Unsubscribe please visit www.chevelles.net/list.html > > To start a new topic, send mail to: [EMAIL PROTECTED] > > > > > > ----------------------------------------------------- > To Unsubscribe please visit www.chevelles.net/list.html > To start a new topic, send mail to: [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
