Series MNKA bearing pedestal assembly 4
Page 32
9250-003-en
Revision 01
TM 10458
Published 06/2022
Application
♦
Lower the rotor unit vertically into the device using a crane until the hub of the pump rotor rests on the
base plate.
♦
Then tighten the 4 hexagon screws to a maximum of 60 Nm.
For single and double-row pump rotors, tighten only the two lower screws.
♦
By tightening the screws, the pump rotor is clamped allowing the impeller to be rotated off the rotor unit.
Universal impeller wrench
To unscrew the impeller, we recommend the use of the universal impeller wrench. This tool can be used
for all impeller diameters from 230 mm to 350 mm.
The tool consists of a heavy duty band wrench, which can be adjusted to the impeller diameter via a screw
mechanism.
Application
♦
Ensure that the sling diameter is set large enough for the current impeller diameter.
♦
To increase the grip of the tool, place sandpaper folded on both sides (grit P100
–
P60) in the area of
the loop and the area of the counterholder.
♦
Arrange the sling over the outer impeller circumference.
♦
Tighten the loop by turning the handle.
♦
A pipe with a lever length of 1000 mm is available to apply the required pull-off torque.
