Re: Bendix -Treadle Vac - Failure and Fix

Posted by PackardV8 On 2010/10/3 23:06:28

I don't believe the "relief port" is any issue here. In fact i see absolutely no way that any fluid could ever travel UP the port. The end of the vacuum power unit that mates to the master cylinder has no vacuum seal. When vacuum is applied to the power vacuum unit then vacuum is also against the plunger seal at back of the master cylinder. SO, any fluid between the master cylinder and power unit would get sucked into the power unit and no way can it be forced UP the "relief port".

The "relief port' is not a relief port. It is a gallery so that fluid can travel FROM THE RESERVOIR, DOWN the 'relief port' to the seal in the back of the MC to keep the seal lubricated.


Either way, "relief port" or lube gallery, regardless of wheather fluid travels up or down the "relief port", nor for any other concept of the function of the 'relief port' the gasket as supplied in the kit and as pictured in DSC08040 should not seal the reservoir from the 'relief port'. I believe the gasket for the 'relief port' should be trimmed away toward the inside of the reservoir.