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Brake Troubles '55 6400
#1342902 Mon Jan 20 2020 03:48 AM
Joined: Sep 2019
Posts: 8
5
New Guy
Now that I have gotten my truck running, I need to figure out how to get her to stop!

Been doing some reading on the forums here about the hydrovac and brake cylinder rebuilding, however I still have a couple questions if anyone happens to know.

First: is there a supplier out there that has complete front wheel cylinders available for these big bolts? I was able to find rear but not front. (Have not pulled anything apart yet so dont know how pitted my wheel cylinders are they may be salvageable. Just curious worst case scenario)

Two: are the 1 ton master cylinders the same as the regular pickup trucks or are they specific to the larger trucks?

Three: this one is region specific, anyone near Chattanooga have a preferred parts supplier that knows a little bit more about these machines beyond Oreillys etc?

Appreciate any intel you guys might have!


'55 Chevrolet Grainer
'57 Chevrolet 210
Re: Brake Troubles '55 6400
55grainer #1342922 Mon Jan 20 2020 07:15 AM
Joined: Dec 2015
Posts: 2,072
Big Bolt Forum Moderator
hopefully it was just a type above but Your 6400 is a 2 ton, not a 1 ton and no, the master cylinder is not the same as a 1/2 ton pickup. Napa and Rock Auto should both have rebuild kits for the front wheel cylinders and the master cylinder. I am not sure about the whole cylinder. Browse or search the big bolt forum though, there was a thread on this exact topic that came within the last week or so. Also, do you have a 55.1 or 55.2 (AD or Taskforce truck). They made a model change mid-year in 55.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
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
Re: Brake Troubles '55 6400
55grainer #1342927 Mon Jan 20 2020 01:10 PM
Joined: Feb 2016
Posts: 342
7
Shop Shark
You won't find an exact match for the front wheel cylinders, as 69Cuda noted read some of the posts in the Big Bolt forum. The casting number on the wheel cylinder will dictate which rebuild kit to use. The master cylinder is not the same as the 1/2 - 3/4 ton as 69Cuda wrote.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto
Re: Brake Troubles '55 6400
55grainer #1342940 Mon Jan 20 2020 02:28 PM
Joined: Sep 2019
Posts: 8
5
New Guy
My truck is a 55.2, Task Force rig. Also yes "1 ton" was a typo, been using the phone and didn't catch that. I did re-read the post you guys mentioned. The first time around I did not catch where someone talked about the front cylinders being discontinued. Will start to pull some stuff apart and see what my casting numbers are.

Thanks


'55 Chevrolet Grainer
'57 Chevrolet 210
Re: Brake Troubles '55 6400
55grainer #1343074 Tue Jan 21 2020 03:17 AM
Joined: Mar 2004
Posts: 4,229
M
Shop Shark
Even it your wheel cylinders are pitted real bad they can be sleeved with brass or SS and be made better than new, so don't scrap your old stuff. Do a google search for wheel cylinder sleeving...I know White Post Restorations does it, but there may be others as well.

Mike B smile


Moderated by  69Cuda, Grigg 

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