TEST OR INSPECTION
If air lines are under pressure when they are disconnected, they can whip around
and cause injury to personnel. Caution should be exercised when disconnecting
air line fittings.
Air lines may be under pressure when control valve is operated. If under pressure
and air lines are disconnected, air lines may whip around and cause injury to
personnel. Caution should be exercised when operating control valve with air lines
Air pressure is checked by disconnecting air line at bumper turret elevation cylinder and
observing air pressure escaping from air line when bumper turret control is activated.
Install bumper turret control cover and tighten four screws. Disconnect air line at
bumper turret elevation cylinder retract port. While an assistant operates bumper turret
control joystick to forward position (WP 0004), check if air pressure is present at
bumper turret elevation cylinder retract port.
If air pressure is present, connect air line at bumper turret elevation cylinder
retract port and go to Step 61.