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Old 04-28-2024, 10:16 AM   #1
chevy43
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Default Mechanical vacuum brake boosters

Does anybody have any information on what's available for mechanical vacuum booster brake parts?

Here is a Searle brain valve in the rod to the pedal I saw this weekend at the truck show. It operated a big diaphragm pulling on the brake cross shaft.

My truck has a different one operating a big vacuum cylinder and none of it has any markings.
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Old 04-28-2024, 10:25 AM   #2
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Default Re: Mechanical vacuum brake boosters

Here is the "brain" valve on my 33 BB.
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Old 04-28-2024, 11:43 AM   #3
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Default Re: Mechanical vacuum brake boosters

There were a lot of different pneumatic (air) vacuum brake manufacturers who made systems which could be fitted to early Ford trucks with mechanical brakes - Westinghouse-Bemdix, Vel-Vac, and Midland Christensen are just a few examples. I have a setup saved from a scrapped truck but it doesn't have a manufacturers name on it.
I doubt there are many sources of parts remaining for any of these vacuum brake systems so you may have to make your own parts.
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Old 04-28-2024, 12:22 PM   #4
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Default Re: Mechanical vacuum brake boosters

I'm looking for another set up. If I just knew some part #s or something - I could search on ebay etc.

I cleaned and lubed the one I have since it was sticking in the on position..

I also cleaned out the little horse hair air filter and oiled it up.
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Old 04-28-2024, 02:02 PM   #5
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Default Re: Mechanical vacuum brake boosters

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Originally Posted by chevy43 View Post
Does anybody have any information on what's available for mechanical vacuum booster brake parts?

Here is a Searle brain valve in the rod to the pedal I saw this weekend at the truck show. It operated a big diaphragm pulling on the brake cross shaft.

My truck has a different one operating a big vacuum cylinder and none of it has any markings.
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Old 04-28-2024, 02:03 PM   #6
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Default Re: Mechanical vacuum brake boosters

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Here is the "brain" valve on my 33 BB.
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Old 04-28-2024, 02:04 PM   #7
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Default Re: Mechanical vacuum brake boosters

Quote:
Originally Posted by chevy43 View Post
I'm looking for another set up. If I just knew some part #s or something - I could search on ebay etc.

I cleaned and lubed the one I have since it was sticking in the on position..

I also cleaned out the little horse hair air filter and oiled it up.
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The only thing nice about being imperfect is the joy it brings to others....

"Silver rings, your butt! Them's washers!"
"We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969

https://www.youtube.com/watch?v=7NReUd2_0u0
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Old 05-03-2024, 05:49 AM   #8
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Default Re: Mechanical vacuum brake boosters

Look at the 55,56 Thunderbird brake booster, They have been used for a long time. JMO
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Old 05-03-2024, 07:08 AM   #9
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Default Re: Mechanical vacuum brake boosters

I have a Midland Hy-Power brake booster, 55-57 T-Bird on my '40. It works very good and can be remotely located. There is a company in Austrailia that makes or made a similar design.


https://www.onlineautoparts.com.au/p...oseo=true&c=AU


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Old 05-03-2024, 09:54 AM   #10
Don W/Norfolk
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Default Re: Mechanical vacuum brake boosters

Here's one on Amazon that might work.
dw
https://www.amazon.com/VH44-Remote-B.../dp/B0C5DXBV3V
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Old 05-03-2024, 10:02 AM   #11
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Default Re: Mechanical vacuum brake boosters

Note that there is a VH40 and VH44 with different diaphragm diameters. Good price on Amazon.

Glenn
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