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Having rebuilt several calipers, the speed bleeders work. In a round about way. First thing is to get fluid through the system. leave the bleeder open and gently work the lever until the brake fluid flows. then use the speed bleeder just like a conventional one. When you are almost finished, you will be pumping the lever two or three times, holding it down, slightly opening the speed bleeder, then closing it, then release the handle, repeat until you have full lever. Used to hang the calipers, etc. Now just leave them in place (after the rebuild(s)) when bleeding them. With the speed bleeders in place bleeding the calipers is a one bottle, no caliper re-positioning event. Without them, the process is hanging the calipers and using inordinate amounts of brake fluid.

And this is with yours truly bleeding them, no helper and no vacuum devices.


I got them to work as well, doing just as Moe says, except I use 2 wedges to fully collapse the cups/pistons 1st, with the bleeder cracked and hosed into a glass, I change out the fluid every year too. I also think they were worth the little money that they cost. I fought with stubborn air bubbles in the calipers at first too, not anymore.