Sounds to me like you may have a master cylinder piston that is hanging up
in the cylinder and not returning to its full "off" position. This prevents
the pedal from getting the full stroke when you apply the brakes and gives
the sensation of a resistance free pedal going to the floor. Remember there
is a pedal return spring in addition to the return spring internal to the
master cylinder. The brakes may also drag in this type situation. Make
sure the internal return spring is in good shape and that there is no rust
in the cylinder that is causing the piston to hang up. Sometimes the
interval of time between brake applications will allow the piston to slowly
return to its full off position thus giving you a very erratic brake
operation.
John F. Quilter
Brisbane, California
MGTD, Morris Minor, Austin America, etc.
R
----- Original Message -----
From: <jvk52td@aol.com>
To: <Mg-t@autox.team.net>
Sent: Saturday, May 22, 2010 4:44 PM
Subject: [Mg-t] Break Failure
> Hi All,
>
> Last fall just before storage I lost the brakes on the TD and put off the
> bleeding project til this spring.
>
> All went well in the bleeding process and my brakes pumped up well and
> very
> stiff to the push on the brake pedal.
>
> Went out for a cruise today and brakes worked fine the first few pushes on
> the
> pedal and then all the way to the floorboard the pedal went, good thing
> for a
> convenient emergency brake !!!
>
> Then after letting up on pedal they were good again for the next few times
> and
> then again all the way to the floorboard. It then seemed like they would
> be
> good for 2, 3 or 4 times and then all of a sudden the pedal would bottom
> out
> but right after letting up on the pedal the next push would be good.
>
> Any suggestions ?? Seems like master cylinder problem, not sure if it is
> bad,
> needs parts or something else ....
>
>
> I was also looking on the Moss site at master cylinders and it seems it
> depends how old you cylinder is what parts are available. Are there other
> outlets for master cylinders or parts beside Moss ??
>
> John in IL
> ______________________________________________
>
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