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Old 01-10-2026, 09:24 PM   #1201
3757chevy
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Re: Working Man's Burbon

So glad you got it ironed out.
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Old 01-14-2026, 12:19 PM   #1202
HO455
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Re: Working Man's Burbon

Thanks for all the support everyone! I know the view counter numbers are highly suspect but I am dumbfounded that it now indicates over 500k.
Thanks again everyone who isn't a interweb robot!

A couple loose ends that I think I should tie up on the big brake adventure. I forgot to post that I put new drums and shoes on the rear axle.

I did end up using the SS braided hoses on the front brakes.

During the early stages of the bleeding I made a wrench (Photos #1 & 2) out of an Allen wrench and a 3/8" socket for the rear bleeders. I am happy to say it worked well and is now part of the brake tool collection.

I don't have one of those fancy tools to set up the push rod clearance. Like many folks I have pretty full tool box of tools I use regularly. No need to add ones that only get used once every 5 or 10 years.

Here's how I determine that clearance. First I measure how far out from the face of the master cylinder mounting surface the push rod extends (Photo #3). I used a steel ruler to reduce the guess work. The ruler is .050 thick so I add .050 to the number I get when I measure it as shown in photo #3 & 4. That will be measurement "D". So "D" plus .050 equals measurement "G".

D=.964 plus .050 equals 1.014. G=1.014

I didn't get any photos of the measuring of the master cylinder bore depth so I made a little drawing to help explain what I did. (Last photo.) I used the same caliper to measure the depth of the piston bore.

First step to get the depth of the bore from the face of the master cylinder was to get measurement "A". A=1.671

Then I measured the snout of the master cylinder which I am calling measurement "B". B = .622

Subtract "B" from "A" gave me the depth which I called "F". 1.671-.622= F=1.049

Subtract "F" from "G" to get the push rod clearance or "E"

F (1.049) minus G (1.014) equals E or .035. Which is the clearance between the bottom of bore and the push rod. I did not find a definitive number for that clearance but, it's generally accepted to be somewhere between .020 and. 060. So I went with .035.

I think this makes sense. If not let me know and I will edit things.
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The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

Last edited by HO455; 01-14-2026 at 12:39 PM. Reason: Added information
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