For some stupid reason unknown to me, my pump will not go past 26hg
even when just pumping to the MityVac gauge. GRRR. Now I'm going to
swap out the drier and take it to my mechanic for the rest of the Evac.
It did hold the 26hg over night.
Luther
Peter Frederick wrote:
Until it holds 29
For some stupid reason unknown to me, my pump will not go past 26hg
even when just pumping to the MityVac gauge. GRRR.
Is it a proper 2-stage vane pump? Ever changed the oil?
Does it make that hollow rattling sound it's supposed to?
Do you have a bleeder screw on the pump that's stuck or
been
It's a 2 stage Gast pump that is sealed and you do not change the oil.
To my knowledge, there is no bleeder screw. I checked the vacuum of the
pump with 2 different MV gauges and an independent gauge. It might just
be tired/worn out and in need of a rebuild.
Luther
Jim Cathey wrote:
For
It's a 2 stage Gast pump that is sealed and you do not change the oil.
To my knowledge, there is no bleeder screw.
So how does one eliminate the moisture and crud that inevitably
gets into the oil in operation? My JBI has fill and drain screws,
and a sight glass. I forget the exact function
This is a good question to which I know not the answer...
Luther
Jim Cathey wrote:
It's a 2 stage Gast pump that is sealed and you do not change the oil.
To my knowledge, there is no bleeder screw.
So how does one eliminate the moisture and crud that inevitably
gets into the oil in
If it's an oil-less pump, you should use a trap and filter to protect
it from crud entering the intake.
-Dave Walton
On Fri, Aug 15, 2008 at 11:37 AM, Luther [EMAIL PROTECTED] wrote:
It's a 2 stage Gast pump that is sealed and you do not change the oil.
To my knowledge, there is no bleeder
what kind of pump are you using?
Luther wrote:
For some stupid reason unknown to me, my pump will not go past 26hg
even when just pumping to the MityVac gauge. GRRR. Now I'm going to
swap out the drier and take it to my mechanic for the rest of the Evac.
It did hold the 26hg over night.
So, my local NAPA store has a good selection of a/c o-rings and the
system is now together and the vacuum pump is doing it's duty. So, with
a system that has moisture in it (from the flush) how long should I let
the vacuum system run? Currently it's at 26hg.
Luther
Luther wrote:
Working on
a system that has moisture in it (from the flush) how long should I let
the vacuum system run? Currently it's at 26hg.
At that pressure? Forever. Needs to be much closer to 30 for
an hour or two, or so I've read. I've pumped them overnight, when
it was open for a long time. (Years, that
The pump can do 29hg, so I'd expect at least 28.
Luther
Jim Cathey wrote:
a system that has moisture in it (from the flush) how long should I let
the vacuum system run? Currently it's at 26hg.
At that pressure? Forever. Needs to be much closer to 30 for
an hour or two, or so I've
Until it holds 29 for at least an hour. If it's only 26 either
your gauge is off (not impossible), the system has a lot of water in
it, or you have a leak (or an undersized pump).
Peter
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