Xylem FLYGT 2640.181, Service And Repair Instructions, Page: 53 / 72

WS001330B
8. Turn the adjustment screw clockwise until the impeller contacts the suction cover.
Tighten a further 1/8 turn, 45°.
The extra 1/8 turn will make sure that the clearance between the impeller and the
suction cover is correct in the next step.
Use an 8 mm hexagon bit adapter (Allen socket) with a 100 mm (4 in) extension.
WS001336A
9. Fasten the impeller:
a) Place the washer on the impeller screw.
b) Lock the impeller to prevent rotation.
Use pliers, a screwdriver, or similar.
c) Tighten the impeller screw.
Tightening torque: 22 Nm (16.2 ft-lb)
d) Tighten a further 1/8 turn, 45°.
e) Check that the impeller can rotate freely.
4 Maintenance
2640.181/.281 Service and Repair Instructions 51