pedal travel help needed

If the pushrod is too long, the powerpiston will not return, which will then not allow the compensating port to allow fresh fluid into the system. Thus as pad material gets butned up, the pedal will sink ever lower. until one day, no brakes.

A similar situation can arise if the hydraulics on one end of the car are not working. But in this case, the pedal goes low one time, and after that, never changes, so long as the Pushrod length is good.