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2. Install the impeller:
a) Place the washer on the impeller screw.
b) Fit the impeller onto the shaft.
c) Tighten the impeller screw.
d) Check that the impeller can rotate easily.
3. Turn the adjusting nuts down to the bottom of the studs.
Flygt 2071 Installation, Operation, and Maintenance Manual
Tightening torque: 20 Nm (15 ft-lbs)
The impeller clearance should be minimal when the impeller is tightened. Use the
adjusting washers to adjust the clearance.
Pumps equipped with polyurethane covering are extremely resistant to wear. If the
impeller does not rotate completely freely, the friction will generate a lot of heat.
This can result in deformed wear parts, a stuck impeller, or damage to the pump.
The impeller clearance should be 0.2–0.3 mm (0.008–0.012 in.) when the impeller is
tightened.
Maintenance
WS001772A
WS001777A
31
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