Mity-Vac Tips

Date: Tue, 17 Feb 1998 17:31:17 -0500
From: John McEwen
Subject: Re: Mity-Vac

>I bought a Mity-Vac in hopes that I could make the frequent bleeding of
>my vintage racer's brakes a one-person job.
>
>Tried it out this week on an empty system and was sorely diappointed.
>The bubbles coming down the plastic tube, which I've always used as a
>sign of how well the system was bled, were just too plentiful to give an
>indication.
>
>I'm pretty sure they were from leakage around the bleeder screw.
>Instructions say to use silicone grease in this area to prevent this,
>but I didn't have any, so I resorted to asking friend wife for help
>pumping the pedal again.
>
>Anyone have sords of wisdom, advice, similar experiences, or want to buy
>my Mity-Vac, used once, for half price?
>--
>uncle jack the carfrek
>TR4 Rallye Replica vintage racer

Don't be in too big a hurry to dispose of it. You have to learn to use it. The trick is to build up suction in the Mity Vac then open the bleeder screw slightly and close it again when the vacuum is nearly gone. If the line is completely empty, fill the master and allow it to drain to an open bleeder - assisting with the pedal if necessary. Don't try to suck fluid through a completely empty line - it takes forever. Mity Vac has many more uses especially for testing vacuum controlled systems in heaters and ignition. It also pushes which can be handy. Don't lose faith because of one bad experience and go buy some silicone grease.

John McEwen