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That is what we figured out from your cryptic post:-) There are air brake systems and combinations on trucks, and some of them have to be bled for various reasons.
Your Snap-on or any other tool supplier could sell you one powered by compressed air. If there are any industrial tool stores in your area they might cary some. As far as specific brands... I dunno. I use a hand vacuum pump to draw the brake fluid thru the lines unless the vehicle has bleeder check valves installed. There is a topic here on those as well as bleeding techniques.
I've been using the Mity Vac plastic pump for years. Works great for brakes, testing vacuume cans etc. You can also use the outlet for pressure. I wore out the first one, working on the second. I'll buy the metal rebuildable next time.
You can fashion a larger catch can out of a quart pickle jar, a couple of pieces of copper tube and some epoxy.
I bought a cabinet at an auction that had a nice brake bleeder system in it made by KD tools it is all stainless steel and very high quality. I haven't had a chance to use it yet so I can't tell you how it works. but it looks great on the shelf.
Well you dont bleed air from a "maxi" brake chamber to release it.. but anyway... To bleed hyd brakes and clutch cylinders I use a bleeder gun from matco tools. Hook it up to shop air... put the hose on the bleeder, pull the trigger and open the bleeder. Close the bleeder when yur done. All the fluid is in the bottle. Best thing I ever used. Everyone has their way of doin it I guess and their own pet tool to do it with. This just happens to be mine. And Careful undoin those brake chambers Dennis..