AEC Colortronic MTF 2000 Series Granulator - Manual (Page 20)

Tangential Feed Granulators Maintenance 20 of 39
5-3 Lubrication
The rotor bearings are self-aligning, spherical roller bearings that are packed with lubricant at
assembly. Grease fittings are provided for re-lubrication and are located on the right and left
hand panels. Lubricate every 2 months or 1500 hours while the machine is running, with
approximately 56 grams (2 oz.) of grease. Use a lithium-based grease conforming to NLGI
grade #1.
5-4 Testing the Interlock Switches
The cutting chamber and hopper clean-out interlock switches insure that the granulator
cannot be running when the cutting chamber or hopper clean-out area are open. When
disengaged, the interlocks open the electrical control circuit to the motor and prevent the
machine from running.
If an interlock does not work, the complete mechanism, including the switch, must be
removed and disassembled to determine the cause of the malfunction.
With the cutting chamber and hopper clean-out area closed and the power on, use the
following procedure to manually test the interlock switches:
1. Push the start button to start the granulator
2. Retract the cutting chamber interlock actuator screw by turning it counterclockwise.
Make sure that the end of the actuator screw is visible and clear of any contact. The
granulator should stop. If the granulator does not stop, the interlock is not working.
3. Engage the cutting chamber interlock actuator screw by turning it clockwise, and
restart the granulator.
4. Retract the hopper clean-out interlock actuator screw by turning it counterclockwise.
Make sure that the end of the actuator screw is visible and clear of any contact. The
granulator should stop. If the granulator does not stop, the interlock is not working.
5. Engage the hopper clean-out interlock actuator screw by turning it clockwise.