Q - Quarterly
S - Semiannually
A - Annually
ITEM TO BE INSPECTED
KINGPIN - CONT
b. Even wear over kingpin surface causing diameter
to be reduced by 1/8 inch (3.2 mm).
A crack of any size is noted anywhere on kingpin.
d. A nick, chip, or gouge deeper than 1/4 inch (6.4
mm) is found anywhere on kingpin wear surface.