AEC Colortronic MSH Series 2039 - Manual (Page 23)

C Series Granulators Maintenance 23 of 53
5-4 Removing and Replacing the Screen
Inspect the screen monthly for wear and cracks. Check the holes in the screen for elongation.
Turn the screens front to back monthly to even out the wear.
WARNING! Avoid contact with the rotor knives, which are just above the screen. The
cutting edges are very sharp.
Removing the Screen
Use the following procedure to remove the screen:
1. Turn the main power off, remove the line fuses, and tag the machine as out of
service.
2. Unscrew the screen cradle interlock actuator screw with a box wrench or ratchet
wrench. Make sure the end of the interlock actuator screw is visible and clear of any
contact. When disengaged, the interlock opens the electrical control circuit to the
motor and prevents the machine from running.
3. Turn the screen cradle retainer knobs clockwise until they stop. Repeat on the screen
retainer knobs at the rear of the screen cradle.
4. Start the screen cradle jackscrew from the jackscrew control panel by turning the
selector switch to the “Lower” position and pressing the button in the center of the
switch. Hold the button until the cradle stops, and then release the button and return
the switch to the off position.
Caution! Allow the jackscrew motor to come to a complete stop, and wait at least 5
seconds before reversing the motor. The jackscrew and other components
may be severely damaged if the jackscrew motor is reversed before it has
completely stopped.
6. Remove the screen one segment at a time:
g. Grasp the screen on its near edge and raise the edge, allowing the screen to
slide in the cradle.
h. Pull the screen toward you slowly, allowing it to slide over the edge of the
screen cradle and then down onto the machine support bar.
Caution! Do not hit the rotor knives with the trailing end of the screen.
i. Ease the screen from the support bar to the floor and remove it from the front
of the granulator.