The Stovebolt.com Forums Home | Tech Tips | Gallery | FAQ | Events | Features | Search
9 - 11 Memorials

Searching the Site - a click away
click here to search
New here ??? Where to start?
Click on image for the lowdown. Where do I go around here?
====
Who's Online Now
2 members (Ole49GMC, GMCJammer51), 76 guests, and 2 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums66
Topics128,035
Posts1,055,566
Members48,426
Most Online14,466
Apr 26th, 2026
Step-by-step instructions for pictures in the forums
Brad Allen's photos

AD Chevy Trucks

Pictures galore
Over 6,000 pictures

Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips.

Check them out!

Lots of work on Brad's part ... pure enjoyment (and references) for you!

Big Thanks!

THANKS!

For helping keep this great
old truck web site
on the Internet for

over 30 years!

and not clogged down
with Ads!


Again, thanks!

Previous Thread
Next Thread
Print Thread
#1513902 08/21/2023 10:15 PM
Joined: Dec 2010
Posts: 47
T
'Bolter
'Bolter
T Offline
Joined: Dec 2010
Posts: 47
I need to replace the master cylinder on my 1949 3100 and would appreciate and advice and suggestions. Thanks


1949 3100
Joined: Sep 2010
Posts: 1,703
W
back yard wrench turner
back yard wrench turner
W Offline
Joined: Sep 2010
Posts: 1,703
bench bleed it 1st.


Wayne
1938 1-Ton Farm Truck
Stovebolt Gallery Forums
1989 Silverado
1996 Mustang GT convertible
When I die, I hope she doesn't sell everything for what I told her I paid for it!

Joined: Dec 2010
Posts: 47
T
'Bolter
'Bolter
T Offline
Joined: Dec 2010
Posts: 47
How do you do that?


1949 3100
Joined: May 2015
Posts: 11,024
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Joined: May 2015
Posts: 11,024
Install a piece of brake line on the outlet, run that back to the fill port and push the pushrod multiple times while the master is secured to a bench (vise).


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
Joined: Aug 2018
Posts: 1,004
2
'Bolter
'Bolter
2 Offline
Joined: Aug 2018
Posts: 1,004
You don’t need to bench bleed it first
Do you think the factory would be messing with dripping brake fluid?
And if you bench bleed it
Do you think you can install it without air bubbles in the master or the lines?
There are two holes in the master between the cylinder and the reservoir
You will not be able to trap air in the cylinder unless something is already wrong
Put the thing on dry and save a mess
Then bleed it on the truck
Just like the factory did
I’ve done this many times
It works every time
Do not over travel the piston
Do not install it from the wrong end
Just follow the instructions in the manual
And everything will work out perfect like magic
-s

Joined: Jan 2000
Posts: 734
S
'Bolter
'Bolter
S Offline
Joined: Jan 2000
Posts: 734
As explained above just fill the MC with fluid, push the plunger as many times as it takes to purge the air--- until there's no more bubbles. Pictures below show a dual reservoir setup but the principle is the same. You'll just have one return line/hose instead of two.

Then put lid on MC and make sure you keep it level until installed.
Attachments
IMG_0919.JPEG (289.49 KB, 46 downloads)
master cylinder bench bleeding set-up
IMG_0920.JPEG (243.57 KB, 46 downloads)


Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
www.truckwithaheart.com

Moderated by  Dusty53, SWEET 

Link Copied to Clipboard
Home | FAQ | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 8.0.0