Xylem FLYGT Concertor, Installation, Operation And Maintenance Manual

Page: 46 / 60

7.5.2 Remove the impeller
1. Put the pump in a horizontal position on the workbench.
2. Loosen the impeller screw until the impeller is free from the clamping sleeve.
Prevent the impeller from rotating. Insert a rod through the pump housing outlet.
3. Put the pump in an upright position on the workbench.
4. Remove the screws between the drive unit and the pump housing.
5. Lift and remove the drive unit. Put the drive unit in a horizontal position on the
workbench.
6. Remove the impeller.
The impeller rests in the insert ring.
7. Remove the O-ring.
8. Remove the impeller screw, the washer, and the sleeve.
7.5.3 Install the impeller
1. Before installation of the impeller, push the sleeve to check that it moves freely up and
down.
When the sleeve is released, it must be fully pushed out again. If the sleeve does not
move freely, or does not come fully out, then replace the impeller unit.
WS009858A
2. Prepare the shaft:
a) Make sure that the end of the shaft is clean and free from burrs.
Polish off any flaws with a fine emery cloth.
b) Coat the inner conic and the outer cylindrical surfaces of the sleeve with a thin layer
of grease.
WS008329B
The proper lubrication is grease for bearings, for example, Exxon Mobil Unirex N3,
Mobil Mobilith SHC 220 or the equivalent.
7 Maintenance
44 6020.180/090 Installation, Operation, and Maintenance Manual