an opening 69 or a single opening in the brake head including the areas of the openings 68 and 69 as needed to accommodate the length of the motor it is noted that both the motor 50 and the ram slider 66 and ram 35 will pass freely through the respective opening 69 and 68 from the outboard side of the brake head i e the portions of these components that extend beyond the outboard surface 58 of the brake head have a cross section smaller than that of the openings through in the brake head through which they pass accordingly the actuator module 36 can be assembled to the brake head from the outboard side thereof and no access to the inboard side of the brake head is required to enable assembly or disassembly of the actuator module from the brake head an alternate arrangement embodies a larger diameter ram pad 64 sized for a particular braking requirement which exceeds the diameter of opening 68 in this embodiment the ram pad can removably attached to the end of the ram for easy removal such as with a quick disconnect device and more particularly a spring loaded locking device as is conventional in the art the known.