I have the Harbor Freight venturi style pump. I use it to draw a vacuum on a water heater to suck up veggie oil for filtering. I do have a large Snap On compressor to run it. I have no problem getting 25" on a 50 gallon tank in maybe 20 minutes. So, it is slow but it is cheap. And if I suck oil into it a quick spray with carb cleaner fixes it.
If you only need it once in a great while it may be the way to go. Mike On Apr 16, 2013 7:02 PM, "David & Kristin Gilmore" < dandkgilm...@frontier.com> wrote: > Have any of you a recommendation on this type of vacuum pump for > evacuating an auto a/c system? > > http://www.tooldiscounter.com/**ItemDisplay.cfm?lookup=** > MAS91200 <http://www.tooldiscounter.com/ItemDisplay.cfm?lookup=MAS91200> > > I am planning for the tools I need to work on my own a/cs . I have > an air compressor (with 30 gallon tank) that claims to put out 5.7 cfm @ 90 > psi. So perhaps I can get by with something like the above unit rather > than pay several times as much for an electrically powered pump? The > comments on the a/c sites vary a lot. I was hoping some of you trustworthy > fellows had experience with such like. > > Also I am looking for thoughts on what I guess are the hydrocarbon > substitutes for R 134, such as Envirosafe and Freeze 12. I tried some > Envirosafe in a 20 year old Porsche R12 system last year and it is working > well so far. > > My most pressing need is to activate the (up until now R 134) system > in my cab tractor before hay season starts in June. The compressor locked > up last fall. I have a new compressor and dryer, and a set of a/c gauges. > > My 83 300SD was converted to R 134 by a dealer's shop about 12 years > ago. It is still working but the compressor is getting rumbly. > > Thanks for your help, > > Dave Gilmore, Cameron WV > > > Everyone looks good in overalls. > > > ______________________________**_________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives > http://www.okiebenz.com/**archive/<http://www.okiebenz.com/archive/> > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.com<http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com> > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
