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Chapter 5: Maintenance 25 of 41
5. Remove the screen, keeping it in a horizontal position (see figure below).
6. Replace the screen with a new one; tighten the screw knob, reposition the
bin and close the front panel. Unlock the power and turn the machine
ON.
Inspection and Adjustment of Knives
NOTE: This operation must be performed by a qualified operator or mechanical
maintenance technician.
NOTE: Before carrying out any maintenance on the cutting chamber, the operator must
put on work gloves thick enough to avoid injury to the hands while touching sharp parts
and the cutting edges of blades.
To inspect the blades, remove the screen following the procedure in “Removal and
Replacement of Screen.” Then proceed as follows:
1. Open the rear-closing panel by releasing the locking latch.
2. Pivot the in-feed hopper completely back to gain clear access to the cutting
chamber.
3. Clear any process material or foreign objects between the knives.
4. Turn the rotor slowly until the first row of rotor knives are in close proximity to
the bed knife cutting edge. Turn the rotor backwards, keep hands and fingers
from directly contacting sharp knife edges.
5. Using a feeler gauge, measure the gap between the rotor and knife cutting edges.
Check each rotor knife to find the “high knife”, or the knife that measures the
smallest gap. If the gap is substantially greater than the specified 0.006 in. to
0.008 in. (0.15 mm to 0.2 mm), the knives need readjustment.
6. Loosen the bed knife shield; hold down the screws and remove the shield.
Figure:
Removing the
screen