There have been a lot of suggestions re this but I know through personal
experience that if there is an air leak in the hose/pipe that connects the end of
the vacuum can to the hydraulic cylinder the booster can lock on. This hose
bleeds air into the vacuum can when the brakes are applied allowing the air
diaphram to move forward and actuate the hydraulic cylinder.
If there is rust in the vacuium can this can also cause the problem.
John
TEdlund(at)aol.com wrote:
> I'm just getting around to working on the problem that took our Alpine off
> the road over a year ago, hanging brakes. I thought it a little odd that both
> fronts calipers would hang at the same time, so I suspected the booster. Sure
> enough, by-passed the booster and no more hanging problems.
>
> It seems that the booster is not letting go somehow. Back in the far corners
> of my mind I seem to recall a thread about this and a fix. Anybody remember
> or have any ideas?
>
> Terry Edlund
> San Diego, CA
> B395009965
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