4 wheel disc conversion question

[jonny0666]

Still having an issue with my brakes locking up. I figure it’s the residual valve. Ive tried everything to get the damn thing out and I'm on the verge of destroying this master. I’ve heard I can just use a 4 wheel drum master cylinder and that could solve my problems. Any truth to this? Thanks.

 

[747mopar]

First off did you change the proportioning valve when you added rear disc brakes, it will require a different one from what it had.

 

[jonny0666]

I ditched the proportioning valve for an adjustable and a mechanical T for the fronts.

 

[chtampa]

Proportioning valve on the rear?

 

[59pwrwgn]

You have to remove the residual valve. When I add front disc to the powerwagon, I kept my drum master. But put a screw in the brass seat and pried it out to get at the residual valve. Afterwards I just screwed the brake line in to reseat it