Richter MNK Series - Manual (Page 30)

Series MNK 200-150-315
Page 30
9230-053-en Revision 12
TM 8195 Edition 03/2011
Application
Deposit the rotating unit using a crane vertically into the device until the hub of the inner magnet assembly rests
on the base plate.
Then tighten the 4 hex. screws to max. 60 Nm.
In the case of one and two-row inner magnet assemblies only the two lower screws are to be tightened.
When the screws are tightened, the inner magnet assembly is clamped so that the impeller can be unscrewed
from the rotating 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
265 mm to 350 mm.
The tool consists of a self-centring lever system with 7 bolts adapted
to suit the vane shape. For weight reasons the outer bolt guide ring
is made of aluminium.
Application
When mounted on the impeller, the tool is centred in the area of
the split ring.
Push the movable bolts into the vane channels.
Caution! Introduce the moulded elements of the vane contour
appropriately so that damage to the rear of the vanes is avoided.
Two flat irons with a total lever length of 1000 mm are available to
generate the required torque.
11.4 Sliding and support pedestal for the slide-in unit
Pump size Ident. No.
MNK 200-150-315 9238-81-1244
Product description
If the pump is removed from the plant without the pump housing for maintenance purposes, the entire slide-in unit
must be moved in the direction of the motor.
For this purpose, the rotating unit must be secured against falling owing to its heavy weight.
If it is not possible to use the crane hook lug on the lantern, the lantern must be supported. For this purpose we
recommend the use of the sliding and support pedestal.
This device is made of plastic (polyethylene) and is easy to move as a result of the low friction value.
Application
Undo and remove the lantern screws 901/3.
Push the device to the left or right past the housing foot
underneath the lantern flange.
The flange is then located inside the transverse recess of the
device.
For safety reasons push the two lower hex. screws 901/3
through the device and lantern bores.
This prevents tipping and lateral displacement..
Now push the slide-in unit out of the pump housing using the
thread provided in the lantern flange.
The stability of the device must be continuously checked.