TM 5-3895-372-10
NOTE
If the locking arm is stuck, push and release the JOG and the RAISE buttons at the same time.
Jog the trough upward only enough to release the locking arm (fig. 2-28).
(3) Press the LOWER button to lower the trough (fig. 2-28). The inclinometer should read 15-25° (fig. 2-29).
If
you need to raise the trough, push the RAISE button.
(4)
Lower the swivel ring lock arm (fig. 2-30).
Swing the trough to left or right as required.
Raise the lock arm
to lock trough (if desired).