Re: [FWDLK] Brake bleeding problems 57-300C power brakes

[Dave Casey <dcasey@xxxxxxxxxxxxx>]

You can't use a single master cylinder with disc brakes. That master
cylinder was designed for drum brakes and will not work effectively on a
disc brake setup. You need to get a master cylinder specifially for a disc
brake car. It sounds to me like your biggest problem is the master cylinder.
Get one for a 74 Dart with manual or power front discs, depending on your
application and see how it works. You can still use the proportioning valve
to tune your braking so that the fronts lock just before the rears.

Dave Casey

----- Original Message -----
From: "George McKovich" <george@xxxxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Thursday, September 30, 2004 6:15 PM
Subject: [FWDLK] Brake bleeding problems 57-300C power brakes


> Hello all...
> In restoring the car I installed a new master cylinder, new
> rear wheel cylinders and shoes and AAJ front disc brakes and
> I have a problem... Here's whats happening. First, all the
> lines are new from Inline Tube and no leaks. The master
> cylinder was bench bled following the NAPA instructions,
> prior to installing. After installing the master, all the
> brake lines were bled in the proper order. I am using DOT 5
> brake fluid and a Wellwood proportioning valve. After dozens
> of times bleeding the brakes, there is a small amount of
> pedal and it is very hard (firm) but seems like I must hold
> it down for a few seconds to get the brakes to activate.
> They certainly would not stop the car if driving down the
> stret or highway. Can anyone tell me what is wrong?? Is the
> DOT 5 the problem?? I have talked to Roger at AAJ Brakes
> today and he seemed to think there was still air in the
> lines but that seems very unlikely to me at this point. I
> was told by the brake guy that it is not going to work with
> a single master cylinder but that is not what I am being to
> by others including Roger at AAJ Brakes. Please help. . . .
> .
>
> Thanks
> George
>
>
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