Abstract: Recess and protrusion features on a brake pad backing plate and an air disc brake tappet create a unique interface that keys the backing plate for use with the tappet. If the backing plate and/or tappet move during braking, the force applied by the protrusion of the tappet against the inner wall of the recess, or vice versa, can cause stress or damage to the backing plate, tappet, and/or other parts of the braking system. To accommodate such movement, the inner dimensions of the recess can be made greater than the outer dimensions of the protrusion. In one embodiment, the minimum dimensions of the recess are determined from a stack-up of tolerances of various components in the braking system. In another embodiment, maximum dimensions of the recess are determined to avoid overlapping step-down transitions in the backing plate and tappet during braking.

Abstract: An aqueous tube cleaning system as described herein can be utilized to clean a plurality of tubes having different lengths. The system includes a tower assembly having a wash chamber that houses the tubes during the cleaning cycle. The tower assembly is held in a horizontal load/unload position for loading and unloading of the tubes. The system rotates the tower assembly into a vertical cleaning orientation to accommodate cleaning with cleaning and rinse solutions, which flow through and around the tubes using the force of gravity. After rinsing and draining, the tower assembly is rotated back to the horizontal position for unloading.

Abstract: An aqueous tube cleaning apparatus and method includes a cleaning receptacle and a vertical receptacle, which is taller than the cleaning receptacle. A tube, or bundle of tubes, is placed in the cleaning receptacle, extending through an inlet port from the vertical receptacle, and a gate is closed to clamp the tubes in place. The vertical receptacle is then filled with a fluid, and the pressure created by gravity forces the fluid through and around the tubes, cleansing the inner and outer surfaces of the tubes.