Brake-Stroke Indicator Design Guideline for Cam or Disc Air-Brake Actuators J1953_201206

DOI: https://doi.org/10.4271/J1953_201206

Issuing Committee: Truck and Bus Brake Actuator Committee

Publisher: SAE International

Pages: 4

Rationale: This standard is being revised as part of the 5 year review process. Most of the revisions are updates to format and wording only. The tolerance for the placement of the stroke indicator band was changed to + 0.0 -3.8 mm (+0 -.15 in) tolerance instead of +0.0 to 3.8 mm (+0 to .15 in). The minus tolerance means the indicator will begin to show from readjust stroke (max.) to 3.8 mm (.15 in) before the readjust stroke is reached. The old tolerance would allow the indicator to begin showing at readjust stroke or up to 3.8 mm (.15 in) after readjust stroke has been reached. The minus tolerance does not reduce the effectiveness of the indicator, but the old plus tolerance may allow for reduced brake effectiveness beyond the stated readjust point.