4. Fit the cutting ring and tighten the screws.
6.8.4 Install the cutting wheel
1. Fit the plastic shim between the cutting ring and the cutting wheel.
The 0.19 mm (0.007 in) thick plastic shim is a spare part: Adjustment washer 811 62 50.
2. Fit the cutting wheel to the adjustment screw until the wheel touches the plastic shim.
3. Fit and tighten the set screw.
Tightening torque: 55 Nm (41 lbf·ft)
4. Make sure that the impeller and cutting wheel can rotate freely.
5. If the cutting wheel does not rotate freely, then adjust it:
a) Prevent the cutting wheel from rotating, and loosen the set screw.
b) To increase the clearance, prevent the adjustment screw from rotating and turn the
cutting wheel counterclockwise.
c) Make sure that the impeller and cutting wheel can rotate freely.
d) Measure the distance between the cutting wheel and the cutting ring.
Measure for every wing on the cutting wheel. The distance must be less than
0.25 mm (0.010 in) for at least one of the wings.
e) When the clearance is correct, tighten the set screw.
Tightening torque: 55 Nm (41 lbf·ft)
6.9 Replace the N-impeller
CAUTION: Cutting Hazard
Worn parts can have sharp edges. Wear protective clothing.
6 Maintenance
Flygt 3069 Installation, Operation, and Maintenance Manual 51
EN
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