10. MODIFICATION PROCEDURE FOR M870A1 BRAKE (BENDIX) (Continued).
(2) Check brake chamber push rod for proper length as follows:
(a) With the brake chamber in the released position (cage if necessary), place a square (or equivalent object)
so that one edge is parallel with the brake chamber push rod and the other edge Is against the camshaft.
(b) Measure the gap from the end of the brake chamber push rod to the vertical edge of the square.
(d) Position the brake chamber push rod locknut approximately 1-5/16 inches from the threaded end. Thread
the clevis adapter on the push rod to about 3/8-inches from threaded end.
(e) Install Automatic Slack Adjuster-5 (ASA-5) on the brake camshaft. Reuse retaining ring set aside during
slack adjuster removal.
Turn ASA-5 adjustment hex clockwise until clevis adapter extends into threaded bore of clevis approximately 1/8-
inch. Thread adapter into clevis and tighten snug.
Place square or other suitable straight edge so that one edge of square is parallel with brake chamber push rod
and the other edge is against the outer edge of the camshaft.
(h) Measure the gap measurement between the outside of camshaft and the center of clevis pin. The distance shall be
not less than 1-1/2-inches, nor more than 2-3/4-inches.