[Healeys] Front disc brakes locking up after rebuild

[Alan Seigrist]

Ron -

If your caliper pistons have rusted under the chrome surface, the bubbles
can bind against rubber piston seals and stick shut.  In brake rebuild
should involve replacing the pistons with new SS pistons.

But then again opening the bleeders and releasing the brakes suggests that
your master is sticking in the down position.  when this happens, does the
brake pedal have more travel than normal before getting pressure?

Alan

On Mon, Aug 8, 2011 at 8:23 AM, Ron Ray <ronald-ray at sbcglobal.net> wrote:

> Folks,
>
> After rebuilding the hydraulic system the front brakes do not release.  If
> the bleed screw is loosened, they do release.
> The rear brakes do not lock up
>
> All rubber hoses were replaced.
> All original steel brake lines were clean with air pressure.
> The connector valve on the passenger side was removed and cleaned with air
> pressure.
> The caliber pistons can be moved by hand when they are off the car.
>
> When the front brakes lock up, the master cylinder piston does not return
> to
> the full "forward:" position.
>
> Any suggestions would be greatly appreciated.
>
> Thanks
>   Ron
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