Re: Brakes

Posted by Gauss On 2007/11/27 1:48:58

Thank you, Brian. You have it quite right, of course.

Although the power brakes vacuum canister assures that a reserve of vacuum is always available to the unit should the demand arise, the vacuum is not applied, in any case, beyond the input port, connecting hose, and vacuum piston, until the brakes are applied.

That means any brake fluid that has managed to leak into the vacuum cylinder section of the Treadle Vac is not subjected to a partial vacuum from the engine manifold unless brakes are applied.

Thus, the time duration for any of the leaked brake fluid to be subjected to engine vacuum is limited to the periods during which the brakes are actually applied.

Brake fluid leaked past the hydraulic piston seal into the vacuum cylinder is not likely to be sucked into the engine in any significant quantities, as far as I can determine.

Gauss