BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
| | Click on image for the lowdown. 
====
| | | Forums66 Topics126,777 Posts1,039,267 Members48,100 | | Most Online2,175
Jul 21st, 2025 | | | | Joined: Feb 2017 Posts: 4 New Guy | | New Guy Joined: Feb 2017 Posts: 4 | 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 Posts: 6,061 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,061 | 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 Posts: 2,061 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,061 | 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. | | | | | Joined: Feb 2017 Posts: 4 New Guy | | New Guy Joined: Feb 2017 Posts: 4 | 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...
| | | | | Joined: Feb 2017 Posts: 4 New Guy | | New Guy Joined: Feb 2017 Posts: 4 | 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... ☹ï¸
Last edited by wildatheart76; 04/12/2017 7:03 PM.
| | | | | Joined: Dec 2015 Posts: 2,061 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,061 | 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 | | |
|
|
