1950DodgeC Posted April 15, 2008 Report Share Posted April 15, 2008 I am in the process of rebuilding my master cylinder, but I am not sure where 1 gasket goes. I have a book but it doesnt seem to be very clear on where it may go. When I took the old one apart, this gasket was not inside it. The gasket or O-ring I am talking about is on the bottom part of the attached picture. The little black round one. Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted April 15, 2008 Report Share Posted April 15, 2008 This might help. Quote Link to comment Share on other sites More sharing options...
62rebelP23 Posted April 23, 2008 Report Share Posted April 23, 2008 it probably got pummelled to pieces over the years, and simply disintegrated. Quote Link to comment Share on other sites More sharing options...
1950B2CToledoOH Posted October 8, 2013 Report Share Posted October 8, 2013 Does that rubber washer replace the metal one that goes between the piston and the main cup seal? New piston has a spring steel ring with holes punched in it about the size of the rubber washer. Bill Quote Link to comment Share on other sites More sharing options...
De Soto Frank Posted October 9, 2013 Report Share Posted October 9, 2013 I am in the process of rebuilding my master cylinder, but I am not sure where 1 gasket goes. I have a book but it doesnt seem to be very clear on where it may go. When I took the old one apart, this gasket was not inside it. The gasket or O-ring I am talking about is on the bottom part of the attached picture. The little black round one. Geeze... they didn't give you a piston return spring in the kit ? That O-ring, or flat rubber washer that is about 5/8" to 7/8 -inch outside diameter, 3/8" to 1/2" inside-diameter, and about 1/8" thick, is the check-valve seat that goes in the "blind" end of the master cylinder. If you look at the photo of the shop-manual page provided by Don Coatney in #2, at the very left end of the top illustration (master cylinder), you will see a part labelled "Plug" ( with a second arrow pointing to the filler cap). The "Plug" on the left, is the "end plug", which threads-into the "blind" end of the master cylinder. on the inside face of the end-plug, there should be a little "hub" or nipple in the center, that the rubber washer snaps-over. This provides a sealing surface for the flat side of the salt-shaker type check-vlave at the top/center of your parts photo. The piston return spring snaps-over the domed, perforated "shaker-top" of the check valve. The "loose" cup floats between the piston-end of the return spring and the aluminum piston itself. The large, "skinny" washer/ring fits between the end-plug and the master cylinder body. Quote Link to comment Share on other sites More sharing options...
wilbur46 Posted November 26, 2013 Report Share Posted November 26, 2013 I did the job in the car. I also did it from the back, by undoing the brake lines and removing the plug. Its a lot easier to get at this end of the thing. That o-ring seals the cap on the pedal side. Loading it all from the plug end is duck soup. Regards, W Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.