AEC Colortronic MTF 2000 Series Granulator - Manual (Page 23)

Tangential Feed Granulators Maintenance 23 of 39
Bed Knives
We recommend that the same screws and washers be re-used only when the bed knives have
been repositioned or re-ground. When blunt knives are discarded and replaced with new
knives, use new screws and washers. This will reduce the risk of screw failure due to their
overstretching. Screws and washers must be replaced with the type specified in the Spare
Parts List.
1. Access the cutting chamber as directed in Section 3-3 on page 14.
2. Loosen and remove the bed knife screws. Make sure you have solid footing while
you apply the breaking force.
Note: These screws are tightened to a torque of 271 Nm (230 lbs./ft.), so make sure
you have the proper breaker bar
3. Remove the bed knife clamps and mounting screws.
4. With an open-end wrench, back off the bed knife adjusting screws.
5. Replace each bed knife and clamp.
6. Use the adjustment screws to set the knife clearance to 0.15 mm (0.006”). The
clearance should be measured with a feeler gauge at the ends of the knife, by rotating
the rotor sheave backwards by hand. The clearance is slightly greater at the center of
the knives. Check both the upstroke and downstroke knife gaps.
Note: Adjust the knife gradually from end to end. Adjusting one side completely and
then the other side will cause the adjusted side to tip slightly.
7. Tighten all of the mounting screws to a torque of 271 Nm (200 lbs./ft.), and re-check
the knife gap.