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brakes on my 2 ton
#1316831 Sun Jul 07 2019 02:31 AM
Joined: May 2016
Posts: 57
C
Wrench Fetcher
working on the brakes on recently bought 1949 chevy 2 ton. Filled reservoir last fall , no brakes . This summer reservoir still full
won't even pump up. What do I do? would like to update master cylinder / hydrovac if possible . Help needed. I assume I start at replacing the
master cylinder ?

Last edited by Charles Pretzer; Sun Jul 07 2019 02:33 AM.

I just finished a 1946 chevy pickup street rod
now on a 1950 chevy 3100
.
also a GMC 220 with duals
and a 1948 chevy 2 ton
Re: brakes on my 2 ton
Charles Pretzer #1316836 Sun Jul 07 2019 03:09 AM
Joined: Nov 2005
Posts: 5,745
3
3B Offline
Master Gabster
Hy Charles Pretzer, I think you should try bleeding the brakes. Do you have a manual for your truck? If you don't have a manual I'm sure one of the helpful gentleman confusilator gurus on here will provide a link to one. While bleeding keep checking for leaks in the metal tubing and rubber flex lines. On a truck of this age I would do a complete brake system overhaul just to make sure everything is working as it should and you and others on the road around you are safe.

Re: brakes on my 2 ton
Charles Pretzer #1316862 Sun Jul 07 2019 12:54 PM
Joined: Sep 2001
Posts: 30,306
ace skiver


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: brakes on my 2 ton
3B #1317005 Mon Jul 08 2019 07:17 PM
Joined: Jan 2019
Posts: 85
S
Shop Shark
Originally Posted by 3B
Hy Charles Pretzer, I think you should try bleeding the brakes.


if there is no brake pressure and you've already pumped the pedal down to the max, good chance you "broke" the master brake cylinder. most old systems brake cups are very sensitive.. so an MBC overhaul is very likely.

Re: brakes on my 2 ton
Charles Pretzer #1317007 Mon Jul 08 2019 07:26 PM
Joined: Sep 2001
Posts: 30,306
ace skiver
Charles, go through the bleeding and adjusting procedure as described in the Shop Manual.

If that gets you no pedal, then you will have determine what part/parts are bad:

brake lines
wheel cylinders
master cylinder
hydrovac


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: brakes on my 2 ton
Charles Pretzer #1317012 Mon Jul 08 2019 07:55 PM
Joined: Dec 2015
Posts: 2,095
Big Bolt Forum Moderator
I agree, it sounds like you have air in the system. If you are taking it out on the road, and don't know when the last time stuff was rebuilt or replaced, I would start with a master cylinder rebuild, new steel and rubber brake lines and pull all wheel cylinders apart and at a bare minimum, put kits in them. All that listed above should be able to be done for about 100$. If you need actual wheel cylinders, then price will go up.

As others have instructed, follow the bleeding instructions in the manual.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
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
Re: brakes on my 2 ton
Charles Pretzer #1319695 Mon Jul 29 2019 04:08 PM
Joined: Jan 2019
Posts: 85
S
Shop Shark
Oh and i just thought of another posibility; when I added Powered brakes to my 69 C10, the standard brake rod wasn't long enough. So i modified it and made it adjustable so I could put the correct amount of pre-pressure with the brake pedal in up position, because my pedal would hit iron at first before I got pressure.

Re: brakes on my 2 ton
Charles Pretzer #1320092 Thu Aug 01 2019 09:35 PM
Joined: Dec 2011
Posts: 54
L
Wrench Fetcher
I am following this thread because I have a similar situation.
69 Cuda, where does one find the parts to rebuild the brakes in these big bolts?
Mike
Not tying to hijack thread just curious about this.

Re: brakes on my 2 ton
Charles Pretzer #1320105 Thu Aug 01 2019 11:19 PM
Joined: Nov 2005
Posts: 5,745
3
3B Offline
Master Gabster
Hy Lightningtruck, if you tell us exactly what you are dealing with and which components of the braking system you are looking for we will do our best to help you. Please start your own thread on the subject.

Re: brakes on my 2 ton
Charles Pretzer #1320123 Fri Aug 02 2019 03:45 AM
Joined: Dec 2011
Posts: 54
L
Wrench Fetcher
10-4. Thanks!

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