No, you're talking about the same part...If the length of the pushrod that goes into the master cylinder is adjusted too much you might also not allow the fluid to return into the master cylinder and your brakes will start to pump themselves on getting tighter with each succesive prod. I've seen rear brakes that start rubbing enough to turn the disc blue and grind the pad right to the metal.

Snap Bunny

I have a calliper here that some guy paid no attention too here. It pumped it self up, wore the pads down, cocked the piston and let fluid all over the disk which then caught fire. Expensive.

Been checking my disc after riding and its just a tad warm and the bike rolls easy enough so the brake is not on, on its own.

When the brake is applied it backs off after it is realesed, still will keep an eye on it dont want flames!

Cheers

Lee