Rebuild the master cylinder. I had the exact same thing happen to me one time,
only it was the clutch pedal. I stabbed the pedal again and it worked fine.
Richard Mayor
BN7L-466 Vintage Racer
Portland, Oregon
> Date: Mon, 30 Apr 2012 07:17:08 -0400
> From: michael.oritt at gmail.com
> To: healeys at autox.team.net
> Subject: [Healeys] Brake problem
>
> Yesterday while returning from a ride in the 100 I applied the brakes and
> the pedal went to the floor--fortunately the emergency brake slowed me down
> enough that I could negotiate the upcoming turn and come to a stop.
>
> After a few deep breaths I stepped on the brake pedal--this time it was
> normal and the brakes functioned seemingly fine. I checked the hydraulic
> fluid reservoir and it was full. I was less than a mile from the garage so
> returned slowly though the brakes continued to work fine and got me back.
>
> In the garage I applied the brakes a few more times, all normal except for
> one time when I held my foot on the pedal it and it went slowly to the
> floor like I was pushing fluid out somewhere through a very small leak but
> there were no leaks. Next push the brake pedal was high and firm. Retested
> several times at 15 to 30 minute intervals--no problems, but obviously
> something is wrong here!
>
> I haven't pulled the master cylinder off and apart yet but am thinking that
> the return valve is somehow hanging up. FWIW I have a BT7 discs in front
> and drums in back and a single circuit setup with a valve in the rear brake
> line which serves as a poor man's proportional setup.
>
> Thoughts?
>
> Best--Michael Oritt
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