I just love my Mighty Vac. For years I had the wife "pump the pedal" while
I worked the bleeders. Brakes worked better- but just was never
satisfied.
A few months ago I bled the brakes on the chevy c10 I'm restoring. I used
the mighty Vac AND wrapped teflon tape around the bleeder threads to keep
them from leaking air. I'll tell you what, this brake pedal is rock
solid no sponginess at all.
I was vey pleased with the results, plan to do the same to my spitfire..
Pat 63 Spitfire (awaiting a bleeding)
"Donald H. Locker" wrote:
> Hi, Dave.
>
> While considering bleeding difficulties, I decided that when the time
> comes, I am going to try a different method. Recognising that air
> really likes to live above hydraulic fluid (fluif), and that
> traditional bleeding attempts to push the air down with the fluid
> (fluif) and out the bleeder screw, and that is bass-ackwards to the
> way that air likes to behave, I will try the following: (anyone
> adventurous enough is welcome to try before I get to it; likely in
> 2001 or thereabouts)
>
> tools: Mity-vac or other source of controlled vacuum, adapter from
> Mity-vac to master cylinder reservoir, sufficient fluid (fluif),
> miscellaneous hoses and a little bit of brake-safe grease.
>
> procedure: attach hose to bleeder screw, drop end into large container
> of fluid (need I add fluif anymore? I trust everyone now knows what
> it is I am talking about...) and apply vacuum from above. Pack a
> little brake grease around bleed nipple threads (to prevent air
> leaking in) and crack open bleeder. Use vacuum source to draw fluid
> up to reservoir (making sure to not draw container down too low).
> Repeat as needed for other bleed screws.
>
> variation: closed container of fluid at slave cylinder, pressurise
> container to push fluid up to M/C reservoir. This method would not
> need the brake grease around the bleed nipple threads, and _might_ be
> easier to control. I'm not sure.
>
> In any case, the idea is to let the air live above the fluid just like
> it likes to do, and pull/push it all upward and out.
>
> Donald.
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