4-33. CAGING AND UNCAGING BRAKE CHAMBER SPRING (Con't).
DO NOT cage brake chamber spring until chock blocks are properly posi-
tioned at wheels. Once brake chamber springs are caged, the semitrailer is
without brakes and can roll. Failure to properly chock wheels may result in
serious injury or death to personnel.
Remove chock blocks from stow-
age brackets and place firmly in
front of and behind wheels (see
Remove nut (4), washer (3), and
release stud (2) from storage
Remove dust cap (5) from end of
rear brake chamber (6) and set
aside. Insert tab end of release
stud (2) in hole and turn 1/4 turn to
secure in slot inside rear brake
Install washer (3) and nut (4) on
release stud (2). Fully tighten nut
to cage spring inside rear brake
Back off nut (4) from release stud (2) in rear brake chamber (6). Remove nut (4), washer
(3), and release stud, and install in storage sleeve (1).
Install dust cap (5).