dragging brakes

[Charger1970]

I believe my front factory disc brakes are dragging excessively. I have replaced the...

master cylinder
wheel bearings
rotors
calipers
brake hoses
pads
brake hardware

I double-checked the wheel bearings and they are not too tight.

Anyone have any experience with this?

[resq302]

Have you had the proportioning vavle replaced?  You might have some rust in there that is letting the fluid through but not back.

[Charger1970]

I actually went to the parts store on Friday to see if I could get one. They said they couldn't get them so I will be looking for one of those.

[resq302]

You might have to send yours out to be rebuilt.  Pick up a hemmings motor news mag and there are a ton of people in there that are reputable that rebuilds brake items such as proportining and metering valves.

[Ghoste]

They are one of the most difficult parts to find for our old Bendix systems.  It will be easier to find a rebuilder as mentioned or replace it with one of the MP adjustable ones.

[Charger1970]

Thanks guys. I'm on it. 

[Chryco Psycho]

What Master cyl did you use ? the drum brake cylnders have a residual pressure valve in them to keep drum brakes from allowing air into the system
even if it is a disc master the residual pressure valve could be installed by mistake