Home » Public Forums » GMCnet » New Item - vacuum pump... read on (Vacuum pump said used from elect cars for braking.....)
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| Re: New Item - vacuum pump... read on [message #163601 is a reply to message #163598] |
Tue, 20 March 2012 02:14   |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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Looking at the picture it shows the leads going directly into the motor, no apparent room or tube connections for a switch.
1/4" tube for the vacuum line MAY (note - this is "may" not "will") indicate this pump may not have adequate flow for braking vacuum. I could be worth the $20 to give it a try.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163604 is a reply to message #163598] |
Tue, 20 March 2012 04:37 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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This did not make it to the GMCnet, we need to forward it here some how
http://www.allelectronics.com/make-a-store/item/PMP-11/AIR/VACUUM-PUMP-USED/1.html
http://www.evparts.com/products/street-vehicle/brakes--dot/switches---street-vehicle/bk2785.htm
why did it not come out of the forum?
this pump is new to me;>)
maybe it could be made to work like one of these
http://goo.gl/HU9aH
but is a lot of work , and the JC4 is much better, has , mounting, relays,
connectors , etal
http://www.appliedgmc.com/prod.itml/icOid/769
great find
gene
On Mon, Mar 19, 2012 at 11:15 PM, Larry C <slawrence111@yahoo.com> wrote:
>
>
> Found this Vacuum Pp....
> --
> Gatsbys' CRUISER :d 08-18-04
> 74 GLACIER X, 260/455-APC-4 Bagg'r
> Remflex Manifold gaskets
>
> CampGrounds needed, Add yours to "PLACES" />
> http://www.gmceast.com/travel
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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
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Alternator Protection Cable
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163611 is a reply to message #163601] |
Tue, 20 March 2012 08:38 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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If I were going to use a pump with those small ports, I'd definitely tie it
directly into a vacuum reservoir (30" of 3" PVC, capped & tywrapped inside
the front frame cross member), with the booster connected to that. That
way the pump's small displacement wouldn't much matter -- it would run
between brake applications to pull a vacuum in the tank.
JWID,
Ken H.
On Tue, Mar 20, 2012 at 3:14 AM, Steve Southworth <midlf@centurytel.net>wrote:
>
>
> Larry C wrote on Tue, 20 March 2012 01:15
> > Found this Vacuum Pp....
> >
> >
> http://www.allelectronics.com/make-a-store/item/PMP-11/AIR/VACUUM-PUMP-USED/1.html
> >
> > This vacuum pump is small and said to be from electric cars and its
> purpose is for BRAKES...
> >
> > This is a rather small powerful piston pump.
> >
> > It is not clear if it has a vacuum switch to shut it down but for the
> price and our use, it may be a great deal.
> >
> > If a vacuum sw is needed, this might be helpful...
> >
> >
> http://www.evparts.com/products/street-vehicle/brakes--dot/switches---street-vehicle/bk2785.htm
> >
> > Any takers? :d
>
>
> Looking at the picture it shows the leads going directly into the motor,
> no apparent room or tube connections for a switch.
>
> 1/4" tube for the vacuum line MAY (note - this is "may" not "will")
> indicate this pump may not have adequate flow for braking vacuum. I could
> be worth the $20 to give it a try.
> --
>
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163612 is a reply to message #163611] |
Tue, 20 March 2012 08:47 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Do you run a reservoir now, Ken?
I know you're not using this kind of pump.
I'm putting in a pump from a Cadillac, and mounting it to the wiper motor plate, but I'm curious about the reservoir. It does make sense.
Dolph
On Mar 20, 2012, at 9:38 AM, Ken Henderson wrote:
> If I were going to use a pump with those small ports, I'd definitely tie it
> directly into a vacuum reservoir (30" of 3" PVC, capped & tywrapped inside
> the front frame cross member), with the booster connected to that. That
> way the pump's small displacement wouldn't much matter -- it would run
> between brake applications to pull a vacuum in the tank.
>
> JWID,
>
> Ken H.
>
> On Tue, Mar 20, 2012 at 3:14 AM, Steve Southworth <midlf@centurytel.net>wrote:
>
>>
>>
>> Larry C wrote on Tue, 20 March 2012 01:15
>>> Found this Vacuum Pp....
>>>
>>>
>> http://www.allelectronics.com/make-a-store/item/PMP-11/AIR/VACUUM-PUMP-USED/1.html
>>>
>>> This vacuum pump is small and said to be from electric cars and its
>> purpose is for BRAKES...
>>>
>>> This is a rather small powerful piston pump.
>>>
>>> It is not clear if it has a vacuum switch to shut it down but for the
>> price and our use, it may be a great deal.
>>>
>>> If a vacuum sw is needed, this might be helpful...
>>>
>>>
>> http://www.evparts.com/products/street-vehicle/brakes--dot/switches---street-vehicle/bk2785.htm
>>>
>>> Any takers? :d
>>
>>
>> Looking at the picture it shows the leads going directly into the motor,
>> no apparent room or tube connections for a switch.
>>
>> 1/4" tube for the vacuum line MAY (note - this is "may" not "will")
>> indicate this pump may not have adequate flow for braking vacuum. I could
>> be worth the $20 to give it a try.
>> --
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163614 is a reply to message #163612] |
Tue, 20 March 2012 09:10 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Dolph,
I have the reservoir mounted, honestly, it hasn't been hooked up since I
put the Cad in. I don't remember why, it's just "not". It should be.
I used to make those reservoirs and sell them at rallies. Frankly, it
wasn't worth the trouble since they're so simple to make: Just go to Lowes
or HD, or a building site and get 30" of 3" OD PVC. Glue a cap on each
end. In the left end cap drill a hole to accept a USED brake booster check
valve. I say used, because of the new ones I bought, 2 out of 5 would
leak, while I've found them in junk yards still holding vacuum on cars that
had obviously been there for months. Goop the check valve into the PVC cap.
Into the side of the tube, drill a hole to accept a piece tubing onto which
the hose to the brake booster will fit. Goop it in place. If you want to
connect a vacuum pump, install a connection for it the same way. Be sure
the vacuum pump has a good check or output valve so it doesn't deplete the
vacuum when not running.
Long 75# wire ties will hold the tank securely inside the front cross
member 'til the cows come home.
A reservoir that size should provide at least another 3 full-pedal stops
after the engine quits and the 2-3 stops in the booster are gone.
It's a cheap and reliable mod. While not quite as good as a reliable
vacuum pump alone, it's a big improvement for nearly nothing. And, as
originally mentioned, it can make up for shortcomings of a vacuum pump.
Incidentally, I too use a modified Cad suspension compressor, connected to
the tank. I don't even use an automatic switch, figuring that if I need
it, with 5-6 applications available, I'll have time to flip on the pump
switch. Probably NOT a good idea considering panic forgetfulness.
Ken H.
On Tue, Mar 20, 2012 at 9:47 AM, Dolph Santorine
<dolph@dolphsantorine.com>wrote:
> Do you run a reservoir now, Ken?
>
> I know you're not using this kind of pump.
>
> I'm putting in a pump from a Cadillac, and mounting it to the wiper motor
> plate, but I'm curious about the reservoir. It does make sense.
>
>
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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] New Item - vacuum pump... read on [message #163617 is a reply to message #163614] |
Tue, 20 March 2012 10:04 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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we have found that the sensitive brake boosters leak vacuum when you hold
down the peddle.
so a reservoir does not work, and just adds more connections to the vac
which we do not need
gene
On Tue, Mar 20, 2012 at 7:10 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> Dolph,
>
> I have the reservoir mounted, honestly, it hasn't been hooked up since I
> put the Cad in. I don't remember why, it's just "not". It should be.
>
> I used to make those reservoirs and sell them at rallies. Frankly, it
> wasn't worth the trouble since they're so simple to make: Just go to Lowes
> or HD, or a building site and get 30" of 3" OD PVC. Glue a cap on each
> end. In the left end cap drill a hole to accept a USED brake booster check
> valve. I say used, because of the new ones I bought, 2 out of 5 would
> leak, while I've found them in junk yards still holding vacuum on cars that
> had obviously been there for months. Goop the check valve into the PVC
> cap.
>
> Into the side of the tube, drill a hole to accept a piece tubing onto which
> the hose to the brake booster will fit. Goop it in place. If you want to
> connect a vacuum pump, install a connection for it the same way. Be sure
> the vacuum pump has a good check or output valve so it doesn't deplete the
> vacuum when not running.
>
> Long 75# wire ties will hold the tank securely inside the front cross
> member 'til the cows come home.
>
> A reservoir that size should provide at least another 3 full-pedal stops
> after the engine quits and the 2-3 stops in the booster are gone.
>
> It's a cheap and reliable mod. While not quite as good as a reliable
> vacuum pump alone, it's a big improvement for nearly nothing. And, as
> originally mentioned, it can make up for shortcomings of a vacuum pump.
> Incidentally, I too use a modified Cad suspension compressor, connected to
> the tank. I don't even use an automatic switch, figuring that if I need
> it, with 5-6 applications available, I'll have time to flip on the pump
> switch. Probably NOT a good idea considering panic forgetfulness.
>
> Ken H.
>
>
> On Tue, Mar 20, 2012 at 9:47 AM, Dolph Santorine
> <dolph@dolphsantorine.com>wrote:
>
> > Do you run a reservoir now, Ken?
> >
> > I know you're not using this kind of pump.
> >
> > I'm putting in a pump from a Cadillac, and mounting it to the wiper motor
> > plate, but I'm curious about the reservoir. It does make sense.
> >
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
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: [GMCnet] New Item - vacuum pump... read on [message #163618 is a reply to message #163617] |
Tue, 20 March 2012 10:13 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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read here
http://gmcmotorhome.info/addens.html#tank
gene
On Tue, Mar 20, 2012 at 8:04 AM, gene Fisher <mr.erfisher@gmail.com> wrote:
> we have found that the sensitive brake boosters leak vacuum when you hold
> down the peddle.
>
> so a reservoir does not work, and just adds more connections to the vac
> which we do not need
>
> gene
>
>
>
>
>
> On Tue, Mar 20, 2012 at 7:10 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
>
>> Dolph,
>>
>> I have the reservoir mounted, honestly, it hasn't been hooked up since I
>> put the Cad in. I don't remember why, it's just "not". It should be.
>>
>> I used to make those reservoirs and sell them at rallies. Frankly, it
>> wasn't worth the trouble since they're so simple to make: Just go to
>> Lowes
>> or HD, or a building site and get 30" of 3" OD PVC. Glue a cap on each
>> end. In the left end cap drill a hole to accept a USED brake booster
>> check
>> valve. I say used, because of the new ones I bought, 2 out of 5 would
>> leak, while I've found them in junk yards still holding vacuum on cars
>> that
>> had obviously been there for months. Goop the check valve into the PVC
>> cap.
>>
>> Into the side of the tube, drill a hole to accept a piece tubing onto
>> which
>> the hose to the brake booster will fit. Goop it in place. If you want to
>> connect a vacuum pump, install a connection for it the same way. Be sure
>> the vacuum pump has a good check or output valve so it doesn't deplete the
>> vacuum when not running.
>>
>> Long 75# wire ties will hold the tank securely inside the front cross
>> member 'til the cows come home.
>>
>> A reservoir that size should provide at least another 3 full-pedal stops
>> after the engine quits and the 2-3 stops in the booster are gone.
>>
>> It's a cheap and reliable mod. While not quite as good as a reliable
>> vacuum pump alone, it's a big improvement for nearly nothing. And, as
>> originally mentioned, it can make up for shortcomings of a vacuum pump.
>> Incidentally, I too use a modified Cad suspension compressor, connected
>> to
>> the tank. I don't even use an automatic switch, figuring that if I need
>> it, with 5-6 applications available, I'll have time to flip on the pump
>> switch. Probably NOT a good idea considering panic forgetfulness.
>>
>> Ken H.
>>
>>
>> On Tue, Mar 20, 2012 at 9:47 AM, Dolph Santorine
>> <dolph@dolphsantorine.com>wrote:
>>
>> > Do you run a reservoir now, Ken?
>> >
>> > I know you're not using this kind of pump.
>> >
>> > I'm putting in a pump from a Cadillac, and mounting it to the wiper
>> motor
>> > plate, but I'm curious about the reservoir. It does make sense.
>> >
>> >
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> 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
>
--
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: [GMCnet] New Item - vacuum pump... read on [message #163625 is a reply to message #163612] |
Tue, 20 March 2012 11:32 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Do you run a reservoir now, Ken?
I know you're not using this kind of pump.
I'm putting in a pump from a Cadillac, and mounting it to the wiper motor plate, but I'm curious about the reservoir. It does make sense.
Dolph
"" I've been running a PVC reservoir for about 8 years now and get 6 full brake applications with the engine off. It can sit for a couple of months with no leak down. However, I do have 2 vacuum pumps sitting on a shelf (one is the older 80's GM type, and the other is a new GM K truck compact unit) so I may not be able to leave well enough alone and add one as well.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=3799&cat=3384
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163630 is a reply to message #163617] |
Tue, 20 March 2012 12:43 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Gene,
I can't see the logic of that. Regardless of whether the booster leaks,
having a reserve of vacuum should be a good thing. Granted, without a pump
to maintain its vacuum, the reservoir won't last long -- but at least as
long again as the booster without that reserve. And, having the reservoir
will enable you to let off of the pedal, saving vacuum, and applying it
again to use from the reservoir. There are really only two additional
connections to be concerned about -- those into and out of the reservoir.
All others should be easily avoidable during construction.
By the way, I forgot to mention before that if someone's building a
reservoir and doesn't have a piece of suitable size tubing for connections,
a brass tube fitting can be screwed into a drilled hole. I'd Goop that
fitting too. Since I have a vacuum pump at my work bench, I always apply a
vacuum to the reservoir while applying the Goop so it's sucked into any
leak. Relieve the vacuum and re-Goop to cover any places the Goop was
drawn all the way in.
Ken H.
On Tue, Mar 20, 2012 at 11:04 AM, gene Fisher <mr.erfisher@gmail.com> wrote:
> we have found that the sensitive brake boosters leak vacuum when you hold
> down the peddle.
>
> so a reservoir does not work, and just adds more connections to the vac
> which we do not need
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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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] New Item - vacuum pump... read on [message #163631 is a reply to message #163627] |
Tue, 20 March 2012 12:51 |
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Amazon has it for $55 and change and free shipping if you
have Prime, BUT we need to see one and see if it can pull
enough vacuum. This looks like a light-duty one to be used
to supply vacuum for the vacuum motors in the heating/AC system.
On 3/20/2012 10:16 AM, LYNN LAYCOCK wrote:
>
> I hope this is a good one. Just purchased it from ebay for $59.00. Google Dorman 904-214 and take a look. It has a built in switch and is used in a lot of diesel applications. Afrer pricing some manufactured towd brake setups, I was inspired by Kens 30.00 towd brake and will make one similar except it will use air instead of vacuum for the actuator.
> http://www.ebay.com/itm/260857634179?_trksid=p5197.c0.m619
>
>
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Terry Taylor
'74 ex-Eleganza SE
San Lorenzo, CA
http://www.n6mon.org
http://dldesignstore.com
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| Re: [GMCnet] New Item - vacuum pump... read on [message #163632 is a reply to message #163627] |
Tue, 20 March 2012 12:52 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Lynn,
There don't seem to be any specs available on that pump, but just from the
photo, I suspect it's not intended for brake vacuum -- more likely for
accessories, like HVAC. That suspicion was reinforced when I looked at
Dorman's U-tube video and saw another video there about the vacuum pumps
for the diesel pickups -- Engine Driven.
If that isn't intended for brake vacuum, then I'd definitely use a
reservoir to increase its duty cycle.
I'm glad to hear you're going to use pressure rather than vacuum for your
$30.00 (+inflation) toad brake. You should be able to get quicker and
more positive operation than I get with my Ford CC.
JWID,
Ken H.
On Tue, Mar 20, 2012 at 1:16 PM, LYNN LAYCOCK wrote:
>
>
> I hope this is a good one. Just purchased it from ebay for $59.00. Google
> Dorman 904-214 and take a look. It has a built in switch and is used in a
> lot of diesel applications. Afrer pricing some manufactured towd brake
> setups, I was inspired by Kens 30.00 towd brake and will make one similar
> except it will use air instead of vacuum for the actuator.
> http://www.ebay.com/itm/260857634179?_trksid=p5197.c0.m619
> _______________________________________________
>
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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] New Item - vacuum pump... read on [message #163634 is a reply to message #163633] |
Tue, 20 March 2012 13:16 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Oh, I don't disagree about still needing the vacuum pump to overcome the
applied leakage. But in the absence of a pump, I'd a whole lot rather have
30 seconds to get stopped than 15.
And If I needed two 15 second applications to get to a safe stopping
location, I'd have them.
Ken H.
On Tue, Mar 20, 2012 at 2:03 PM, gene Fisher wrote:
> >
> > I can't see the logic of that. Regardless of whether the booster leaks,
> > having a reserve of vacuum should be a good thing.
>
>
> if your engine quits, you need to push on the brake and hold it until you
> get stopped or the wheels blocked (like on a hill)
>
> with the booster leaking vacuum, any reservoir will not keep your brakes
> on because the vacuum will all leak away. A vacuum pump will supply the
> vac as long as you need it.
>
> So you will not get 5 pumps with a reservoir.
>
> as always your choice
> gene
>
>
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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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