Air Break Practice Test

Results

#1. When you use the free stroke (pry bar) method, the pushrod should not move more than

¾ inch (19 mm).

1 inch (25 mm).

1¼ inches (32 mm).

2 inches (51 mm).

To measure pushrod stroke with the free stroke (pry bar) method, use a pry bar to pull the pushrod out of the brake chamber. It should only move ½ – ¾ inch (13 mm – 19 mm). If the pushrod moves more than that, the brake needs adjustment.