what is a mighty vac?

Answer 1

Actually, I think what you're asking about is called a "Mity Vac", and it's the retail brand for a small suction device used to facilitate the bleeding of hydraulic brake and clutch lines. Another brand of brake-bleeding devices is "Actron." Both are fine. There are other options too, like Griot's One-Man Brake-fuid Extractor which in my opinion works better than either of the hand-pump varieties. The premise for all of these are the same. Create a vacuum to suck out the old brake fluid while you replace it with the new brake fluid. It makes for much quicker brake fluid changes.

I find the Mity Vac has a tighter rubber seal on the jar, whereas the Actron jar requires one to dab a layer of grease or petroleum jelly around the edge to really maintain a seal. But the Actron pump mechanism is quite sturdy bcs it's metal, whereas the mity vac pump mechanism is plastic.

Answer 2

You pronounced it right. But it's spelled "Mity Vac". It's a hydraulic brake bleeder.
One end of a hose is connected to the bleeder valve on a brake caliper. The other end of the hose is connected to the Mity Vac. When the handle and trigger lever are squeezed together, a piston is pulled away from the end of the Mity Vac where the hose is connected. The piston creates a vacuum (like drawing blood with a syringe). When the bleeder valve (on the caliper) is open, the vacuum pulls brake fluid and air from the brake line.
Instead of constantly pumping the brake lever and opening / closing the bleeder valve - bleed your brakes with a Mity Vac. Open the bleeder valve and just keep squeezing the Mity Vac's handle and lever.
http://store.58cycle.com/product_p/mityvac.htm

Answer 3

its an air operated hydraulic bleeder, its designed for use on cars and motorcycles to bleed brakes and clutch. check snap on or local parts store for availability

Answer 4

A wonderful thing the internet! Try this:
http://www.mightyvacdirect.com/