| Where are instruction for Replacement for Vacuum Pump [message #234950] |
Fri, 03 January 2014 15:30  |
George B.
Messages: 213
Registered: February 2012
Karma: 1
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I saw something about building a vacuum reservoir with large PVC pipe to build a static device to replace the pumps many of us use to maintain stopping ability if engine stops. Anyone remember where to find the info?
George Butts
Las Vegas Nevada
73 "Custom 26' Q" & 76 23' Birchaven
71 Honda 600 Coupe & 01 Tracker Toads
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| Re: [GMCnet] Where are instruction for Replacement for Vacuum Pump [message #234972 is a reply to message #234950] |
Fri, 03 January 2014 19:38  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Go to Lowes, Home Depot, or similar and get a 1/4 MPT to Tube adapter
fitting. Also get a 30" section of 4" schedule 40 PVC pipe and two end
caps to fit, and the cement to attach those caps to the ends of the pipe.
You can probably find 3 heavy duty 18"+ cable ties there too.
Go to a junk yard and get a brake vacuum check valve from a junker (25% of
the NEW Help rack valves I bought were bad -- never got a bad junked one).
Drill one of the end caps to accept the vacuum-holding side of the check
valve and glue the valve in the hole (I use Plumber's Goop -- or some other
Goop). Drill and tap the pipe near that end cap to accept the 1/4 MPT to
Tube adapter and install same (you CAN just glue it in, but threading is
better). Glue the caps on the pipe. The reservoir is complete.
Put the new reservoir inside the rear of the front cross member and secure
it there with the cable ties (or your better idea). Disconnect the vacuum
line to the engine from the brake booster and attach it to the check valve
in the end cap -- hopefully it will reach; if not, disconnect BOTH ends of
the line and connect it between the booster check valve and the side
fitting on the reservoir. Now, use ANOTHER vehicle to go get enough 3/8"
vacuum hose to complete the installation -- reservoir to booster or engine
to reservoir.
Install the second hose and you're done. One added check valve to fail
(non-catastrophically), and 3-5 more brake applications for <$20.
Ken H.
On Fri, Jan 3, 2014 at 4:30 PM, GEORGE BUTTS wrote:
>
>
> I saw something about building a vacuum reservoir with large PVC pipe to
> build a static device to replace the pumps many of us use to maintain
> stopping ability if engine stops. Anyone remember where to find the info?
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Where are instruction for Replacement for Vacuum Pump [message #234989 is a reply to message #234988] |
Fri, 03 January 2014 20:43 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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and
adds a lot of unnecessary, leak prone, plumbing to the vac system
jwid
On Fri, Jan 3, 2014 at 6:40 PM, Ken Henderson <hend4800@bellsouth.net>wrote:
> 3 more's better'n no more. Plus pump is better. But reservoir costs a lot
> less & is more reliable.
>
> Ken H.
>
>
> On Fri, Jan 3, 2014 at 6:20 PM, mr.erf wrote:
>
> > Does not replace a pump
> > On fact only gives 3 pumps
> > Don't Do it
> >
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: Where are instruction for Replacement for Vacuum Pump [message #234999 is a reply to message #234950] |
Fri, 03 January 2014 22:15 |
George B.
Messages: 213
Registered: February 2012
Karma: 1
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Senior Member |
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I knew it was somewhere...thanks for the link. To clarify, I have the pump on my coach and am not thinking of removing it. The coach my wife just got has none at all and I was thinking about the passive system for that coach. Now reading the links provided by Gene, I am tending towards a vacuum pump on the new coach as well.
Thanks everyone.
George Butts
Las Vegas Nevada
73 "Custom 26' Q" & 76 23' Birchaven
71 Honda 600 Coupe & 01 Tracker Toads
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