35
SUBSYSTEM 3: HYDRAULIC CONTROL SYSTEM (CONTINUED)
During auto-reverse, the rotary air valve reverses direction for approximately 1 second. While in
reverse, it also cuts power to the floor, shutting it OFF. At the end of the auto-reverse cycle, power
is restored to the forward solenoid, putting the rotary air valve back into forward and restarting the
floor after a 2-second delay.
There is a built-in 2-second time delay in the floor hydraulic circuit. This delay ensures that
material is not fed into the rotary air valve before the auto-reverse cycle has completed. In the
case of multiple auto-reverse cycles, it is meant to keep the transition area above the rotary air
valve clear of any new material. There is also a time delay for the pressure switch. Since the
electronics can reset faster than the hydraulics, the time delay activates the pressure switch after
its set time passes following an auto-reverse cycle. This small amount of time, approximately
0.4 seconds, allows the relief valve to fully close and the pressure switch to return to the open
position, eliminating a false signal that would trigger another auto-reverse cycle.
When the MATERIAL STOP button is pushed, power is cut to the floor and rotary air valve
solenoids. Turning off the hydraulics master switch, pressing the engine stop (ENG STOP) button
or turning off the ignition key can also stop the hydraulics. Please note that the hydraulics will also
stop if either transition door between the floor and the rotary air valve is opened and cannot be
restarted until the doors are closed and the MATERIAL START button on the pendant is pushed
again.
To Next Page
Loading...
