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[GMCnet] Brake booster vacuum pump [message #364842] Sat, 19 June 2021 15:41 Go to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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I need to replace my brake booster vacuum pump, what's everyone using these days?ThanksRay ErspamerSent from my U.S.Cellular© Smartphone
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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[GMCnet] Re: Brake booster vacuum pump [message #364843 is a reply to message #364842] Sat, 19 June 2021 16:09 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
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At least 2 ways to go.
One is to just make a vacuum canister out of PVC pipe, and run a large
vacuum hose to the booster. Engine vacuum suffices to charge the canister.
No pump required. Or, a smaller pump will suffice to replenish the vacuum
needed when the engine is off.
The second, is to use an electric driven larger vacuum pump, with no
canister. But it needs to be big enough to perform the brake booster task
all by itself. Those pumps are more $$$, and are usually turned on and off
via a vacuum sensing switch and relay setup. Again, a more complex
system, not exactly trouble free.
Pretty hard to find something that pumps as much vacuum as your engine.
Jim Hupy
Salem, Oregon

On Sat, Jun 19, 2021, 1:41 PM 78gmcroyale wrote:

> I need to replace my brake booster vacuum pump, what's everyone using
> these days?ThanksRay ErspamerSent from my U.S.Cellular© Smartphone
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> GMCnet mailing list
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[GMCnet] Re: Brake booster vacuum pump [message #364845 is a reply to message #364843] Sat, 19 June 2021 20:24 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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That's what I want to replace, the pump that shuts on and off.  Mine won't shut off anymore and runs continuously. Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: James Hupy Date: 6/19/21 4:10 PM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump At least 2 ways to go.     One is to just make a vacuum canister out of PVC pipe, and run a largevacuum hose to the booster. Engine vacuum suffices to charge the canister.No pump required. Or, a smaller pump will suffice to replenish the vacuumneeded when the engine is off.     The second, is to use an electric driven larger vacuum pump, with nocanister. But it needs to be big enough to perform the brake booster taskall by itself. Those pumps are more $$$, and are usually turned on and offvia a  vacuum sensing switch and relay setup. Again, a more complexsystem,  not exactly trouble free.     Pretty hard to find something that pumps as much vacuum as your engine.Jim HupySalem, OregonOn Sat, Jun 19, 2021, 1:41 PM 78gmcroyale wrote:> I need to replace my brake booster vacuum pump, what's everyone using> these days?ThanksRay ErspamerSent from my  U.S.Cellular© Smartphone> _______________________________________________> GMCnet mailing list> Unsubscribe or Change List Options:>_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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Re: [GMCnet] Brake booster vacuum pump [message #364846 is a reply to message #364842] Sat, 19 June 2021 21:24 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
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Talk to Dave Lenzi. He has an adapter to the vacuum booster with a built-in vacuum switch. I'm not sure about a pump, but he can bring you up to date about that.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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Re: [GMCnet] Brake booster vacuum pump [message #364857 is a reply to message #364842] Sun, 20 June 2021 16:01 Go to previous messageGo to next message
Carl S. is currently offline  Carl S.   United States
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Ray,

If your vacuum pump runs constantly, you might have a leak in your brake booster that doesn't allow the vacuum to build up to the point where the pump shuts off.

Just a thought. It might be a good idea to check that out.

Carl Stouffer '75 ex Palm Beach Tucson, AZ. Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member

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[GMCnet] Re: Brake booster vacuum pump [message #364858 is a reply to message #364857] Sun, 20 June 2021 17:14 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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I had thought of that, so I Disconnected the hose from the power brake booster and plugged it, pump kept running.  I need to remove the pump and do more analysis on it.Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: Carl Stouffer Date: 6/20/21 4:02 PM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump Ray, If your vacuum pump runs constantly, you might have a leak in your brake booster that doesn't allow the vacuum to build up to the point where the pumpshuts off.Just a thought.  It might be a good idea to check that out.-- Carl Stouffer'75 ex Palm BeachTucson, AZ.Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,Solar battery charging.  GMCSJ and GMCMI member_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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Re: [GMCnet] Brake booster vacuum pump [message #364859 is a reply to message #364842] Sun, 20 June 2021 17:59 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
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Sounds like pump working “too good”. Can you just unstick or replace switch? Maybe McMaster, Granger or such?

John Lebetski
Woodstock, IL
77 Eleganza II

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[GMCnet] Re: Brake booster vacuum pump [message #364860 is a reply to message #364859] Sun, 20 June 2021 18:13 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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I plan to remove it tomorrow and try to figure out if it can be fixed.Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: "John R. Lebetski" Date: 6/20/21 5:59 PM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump Sounds like pump working “too good”.  Can you just unstick or replace switch?  Maybe McMaster, Granger or such?   -- John LebetskiWoodstock, IL77 Eleganza II_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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[GMCnet] Re: Brake booster vacuum pump [message #364873 is a reply to message #364860] Mon, 21 June 2021 11:15 Go to previous messageGo to next message
Emery Stora is currently offline  Emery Stora   United States
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Most vacuum pumps have a vacuum set switch either internally or an external switch. This switch can be set to turn off when the desired vacuum is reached.
As you go up in altitude the vacuum the he pump can achieve will be less. If you have the switch set too high the pump may not be able to achieve the vacuum and it will run forever.

Emery Stora
emerystora@mac.com



> On Jun 20, 2021, at 5:13 PM, 78gmcroyale wrote:
>
> I plan to remove it tomorrow and try to figure out if it can be fixed.Sent from my U.S.Cellular© Smartphone
> -------- Original message --------From: "John R. Lebetski" Date: 6/20/21 5:59 PM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump Sounds like pump working “too good”. Can you just unstick or replace switch? Maybe McMaster, Granger or such? -- John LebetskiWoodstock, IL77 Eleganza II_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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[GMCnet] Re: Brake booster vacuum pump [message #364874 is a reply to message #364859] Mon, 21 June 2021 12:20 Go to previous messageGo to next message
lcoldren is currently offline  lcoldren   United States
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The vacuum switch used by Dave Lenzi on his brake booster is made by Shift Technology Products called Adjustable Vacuum Switch part # K085.
Good Luck
Larry Coldren
Ft. Collins CO
1974 Canyonlands

________________________________
From: John R.Lebetski
Sent: Sunday, June 20, 2021 04:59 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Brake booster vacuum pump

Sounds like pump working “too good”. Can you just unstick or replace switch? Maybe McMaster, Granger or such?
--
John Lebetski
Woodstock, IL
77 Eleganza II
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[GMCnet] Re: Brake booster vacuum pump [message #364875 is a reply to message #364874] Mon, 21 June 2021 12:33 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
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#K-085 or #K-058?

Ken H.

On Mon, Jun 21, 2021 at 1:20 PM Lawrence Coldren wrote:

> The vacuum switch used by Dave Lenzi on his brake booster is made by Shift
> Technology Products called Adjustable Vacuum Switch part # K085.
>
>
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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[GMCnet] Re: Brake booster vacuum pump [message #364877 is a reply to message #364874] Mon, 21 June 2021 14:50 Go to previous messageGo to next message
lcoldren is currently offline  lcoldren   United States
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Kin thanks for catching my error. the switch part 3 is K 058.
Larry C


________________________________
From: Lawrence Coldren
Sent: Monday, June 21, 2021 11:20 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Brake booster vacuum pump

The vacuum switch used by Dave Lenzi on his brake booster is made by Shift Technology Products called Adjustable Vacuum Switch part # K085.
Good Luck
Larry Coldren
Ft. Collins CO
1974 Canyonlands

________________________________
From: John R.Lebetski
Sent: Sunday, June 20, 2021 04:59 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Brake booster vacuum pump

Sounds like pump working “too good”. Can you just unstick or replace switch? Maybe McMaster, Granger or such?
--
John Lebetski
Woodstock, IL
77 Eleganza II
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[GMCnet] Re: Brake booster vacuum pump [message #364878 is a reply to message #364877] Mon, 21 June 2021 15:06 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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I removed the pump today and looked at it.  It's a completely sealed unit...it's TOAST.  So I ordered a new unit....https://swperformanceparts.com/product/1420/gclid=CjwKCAjw8cCGBhB6EiwAgOReyzo9LnJpgqsioCUq_CJJh3FZzHAwB9Q9eulLT5Ihvpg22Lg71Nz3ihoCNBQQAvD_BwES ent from my U.S.Cellular© Smartphone
-------- Original message --------From: Lawrence Coldren Date: 6/21/21 2:50 PM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump Kin thanks for catching my error.  the switch part 3 is K 058.Larry C________________________________From: Lawrence Coldren Sent: Monday, June 21, 2021 11:20 AMTo: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pumpThe vacuum switch used by Dave Lenzi on his brake booster is made by Shift Technology Products called Adjustable Vacuum Switch part # K085.Good LuckLarry ColdrenFt. Collins CO1974 Canyonlands________________________________From: John R.Lebetski Sent: Sunday, June 20, 2021 04:59 PMTo: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pumpSounds like pump working “too good”.  Can you just unstick or replace switch?  Maybe McMaster, Granger or such?--John LebetskiWoodstock, IL77 Eleganza II_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:_______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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Re: [GMCnet] Re: Brake booster vacuum pump [message #364887 is a reply to message #364878] Tue, 22 June 2021 07:26 Go to previous messageGo to next message
Larry is currently offline  Larry   United States
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Ray,
What kind of vacuum does this pump create? 21"...more or less?

Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.

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[GMCnet] Re: Brake booster vacuum pump [message #364889 is a reply to message #364887] Tue, 22 June 2021 08:54 Go to previous message
Ray Erspamer is currently offline  Ray Erspamer   United States
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It comes with an Adjustable valve 18-22"Sent from my U.S.Cellular© Smartphone
-------- Original message --------From: Larry Date: 6/22/21 7:26 AM (GMT-06:00) To: gmclist@list.gmcnet.org Subject: [GMCnet] Re: Brake booster vacuum pump Ray,What kind of vacuum does this pump create?   21"...more or less?-- Larry  78 Royale w/500 CaddyMenomonie, WI._______________________________________________GMCnet mailing listUnsubscribe or Change List Options:
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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