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master cylinder rebuild removal necessary? #1329317 Wed Oct 09 2019 03:23 AM
Joined: Jul 2019
Posts: 13
M
morerog Offline OP
New Guy
Is it necessary to remove a master cylinder in order to rebuild it?
There is only a very slow leak at the from of the MC, and otherwise has been working great.
Thanks,

Roger Schroeder
1951 Chevrolet 3600.

Re: master cylinder rebuild removal necessary? [Re: morerog] #1329333 Wed Oct 09 2019 11:39 AM
Joined: May 2005
Posts: 9,134
G
Grigg Offline
.
It’s not usually necessary to remove master or wheel cylinders to hone and rebuild them.
Sometimes better to leave them installed if removing might lead to more work than you’re prepared for.
Alternatively often easier to just remove them and work on things on the bench and get a better view.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: master cylinder rebuild removal necessary? [Re: morerog] #1329339 Wed Oct 09 2019 12:27 PM
Joined: Feb 2019
Posts: 251
P
Phak1 Offline
Shop Shark
Assuming we are talking about a below the floor master cylinder, I just removed mine in about 15 minutes on my 52’ 3100 to rebuild it. After cleaning and honing, I decided to replace it due to corrosion in the bore that I could not remove. I don’t think I would have seen the issue with the master cylinder installed. I also can’t fathom performing all the work involved in the rebuild lying on my back. In addition, the back of the master cylinder is only a few inches from the rear transmission crossmember so honing it would be near impossible.

I second Grigg’s suggestion to remove and work on the bench. Your back will thank you

Attached Files
2A5E1212-EB9F-4374-A0DB-38DCE390A77F.jpeg (103.97 KB, 130 downloads)

Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: master cylinder rebuild removal necessary? [Re: morerog] #1329423 Thu Oct 10 2019 03:24 AM
Joined: Apr 2002
Posts: 1,509
F
Fox Offline
Shop Shark
Anyone know where a guy can get s dust cover rubber boot for the pushrod plunger? I have nalresdy replaced the interanls, but now can’t find the dust boot independently to complete the rebuild.

Sorry to hijack...😬

I vote remove it as well. Working on your feet is so nice; plus you don’t have dirt falling in your eyes (or your new cylinder!).

Last edited by Fox; Thu Oct 10 2019 03:25 AM.

In the Stovebolt Gallery
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1951 GMC 9430 1 ton dually—-Shiny!

1970 Chevrolet C10 - Grandpa’s- My first truck.—in progress to shiny
1972 Chevrolet C20- rusted
1970 Chevrolet K20 Suburban—rusted.
1950 Chevrolet 1300- in progress to shiny.

Parts trucks-
1951 GMC 9300
1951-GMC 9430
1951- Chevrolet 1300
Re: master cylinder rebuild removal necessary? [Re: Fox] #1329425 Thu Oct 10 2019 05:32 AM
Joined: May 2015
Posts: 1,466
K
klhansen Offline
Shop Shark
Originally Posted by Fox
I vote remove it as well. Working on your feet is so nice; plus you don’t have dirt falling in your eyes (or your new cylinder!).

I try to work sitting down whenever possible. Even nicer than working on my feet. thumbs_up
I removed my MC after the cab was off so didn't have to worry about the dirt.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos
Re: master cylinder rebuild removal necessary? [Re: Fox] #1329429 Thu Oct 10 2019 11:25 AM
Joined: Jul 2008
Posts: 1,213
H
Harold46 Offline
Shop Shark
Quote
Anyone know where a guy can get s dust cover rubber boot for the pushrod plunger? I have nalresdy replaced the interanls, but now can’t find the dust boot independently to complete the rebuild.


You should find what you need on one of these sites.


TRY HERE

Ebay

Steele Rubber

Harold

Last edited by Harold46; Thu Oct 10 2019 11:38 AM.

Harold
Is a restoration ever finished?
Re: master cylinder rebuild removal necessary? [Re: morerog] #1329431 Thu Oct 10 2019 11:54 AM
Joined: Feb 2019
Posts: 251
P
Phak1 Offline
Shop Shark
You can buy it at Classic Parts but shipping is $9.95 minimum. Do you need anything else?

https://www.classicparts.com/1947-72-Master-Cylinder-Boot-Manual-Brake/productinfo/71%2D285/

Last edited by Phak1; Thu Oct 10 2019 11:56 AM.

Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: master cylinder rebuild removal necessary? [Re: morerog] #1329460 Thu Oct 10 2019 07:16 PM
Joined: May 2005
Posts: 6,282
B
bartamos Offline
Master Gabster
Morerog: I have never even thought of doing it on the truck so don't know how hard it is. I've only done it on the bench.
could not do a good inspection, ream job, parts insert job or bleed job lying under the truck. It's the brakes you know.

Hijacker:
Most, but not all, of the parts at Steele are American made with American rubber. They will last way longer than all the other off shore pieces. Email them to see if this boot is made in USA. If not, the cheaper ones may be from the same source*. If made here, buy that one.
Steele used to be 100% American made parts. I guess they had to compete with some parts or not enough demand to build tooling. Anyway, they still make most at their factory.

* Their site says they buy some parts from outside vendors who buy from off shore.


I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.



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