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Joined: Feb 2017
Posts: 4
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New Guy
New Guy
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Hi folks,

currently rebuilding the brake system on my L.C.F. So can anybody tell me, what the main brake cylinder cap from a 56 Chevy L.C.F. looks like from above or better has a pic of it!? Former owner has damaged the cap badly... 😜 And is there a gasket there originally under the cap?

And anybody knows where I can find rebuild kits for the Hydrovac Booster of this truck!?

Thanks in advance
Rico

Joined: Nov 2005
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'Bolter
'Bolter
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Hy wildatheart76, welcome, the o.e.m. part number for the cap is 5455826 apparently it had the words "use GMC Brake Fluid" in raised letters. I have no picture and I can't remember if it had a hex shape or a square shape which you turned to remove it. I tried crossing the o.e.m. part number on Napa's website but nothing came up. There was a gasket under the cap o.e.m. part number 080445 1 1/4" I.D. X 1 11/16" O.D. X 1/16" thick fibre, you might try doing a search on Ebay for those part numbers, hope that helps.

Joined: Dec 2015
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Big Bolt Forum Moderator
Big Bolt Forum Moderator
Joined: Dec 2015
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American classic part # BR0304 would probably fit. http://www.americanclassic.com/asp/dynca...amp;exyear=1959

1 1/4" thread diameter, check your thread diameter and see what it is. Mine has a hex shape on the top.

as far as the htydravac, here is a note I pulled from another thread a while ago.
DS in VA has done a very good job for me, 276-322-3119, Jeff is the hydrovac gentleman, very knowledgeable, reasonable prices, unlike some others.


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
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1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
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Sufficient unto the day is the evil thereof
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New Guy
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Thanks for the answers!

After further cleaning and inspection of the cap it seems it had a hex shape (could've been 5/8" size) and the embossed letters I hardly could read say "USE EIS HEAVY DUTY FLUID" and "EIS W944".
So it seems it is a different cap as on your trucks!?
Thread diameter is 1 9/16".

Seems I should try to restore it to the original hex shape...



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This is how it looks like at the moment:

[url=https://picload.org/image/rcagapcw/img_0961.jpg][/url]

Edit: Try to make a link out of the URL, but don't know, why it doesn't work... ☹️

Last edited by wildatheart76; 04/12/2017 7:03 PM.
Joined: Dec 2015
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Big Bolt Forum Moderator
Big Bolt Forum Moderator
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I would try fixing that one. Looking on Napa's website, they have a rebuilt master cylinder for 41.99 but it has a plastic cap.

https://www.napaonline.com/en/p/NMBP21698


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof

Moderated by  69Cuda, Super55 

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