ANSWER KEY AND FEEDBACK
Correct Answer and Feedback
Pilot check valve.
a pressure loss it will not open, thereby preventing the flow of
the hydraulic fluid preventing the door from closing. (Page 7,
causes the brake to release. If there is a pressure loss, the
brake will engage, preventing the stacker tray from falling.
(Page 7, para 4 and Page 8, para 1)
The main pressure relief valve opens and relieves back to the
The dump valve must be closed.
If the dump is open, it will
allow the hydraulic fluid to return to the reservoir.
pressure will build and the backup hydraulic pump will not engage
and the hydraulic circuits will not function. (Page 12, para 6)
The MASTER switch must be in the on position. You must give the
hydraulic fluid in the actuator and lines a path back to the
reservoir when you manually open the rear door and force the
fluid to move. With electric power available, you can properly
position directional control valve spool using the solenoid and