7 Servicing/Maintenance
47 of 96
Magnochem-Bloc
NOTE
After commissioning, increased temperatures may occur at grease-lubricated rolling
element bearings due to the running-in process. The final bearing temperature is
only reached after a certain period of operation (up to 48 hours depending on the
conditions).
7.2.2 Inspection work
DANGER
Excessive temperatures caused by friction, impact or frictional sparks
Explosion hazard!
Fire hazard!
Damage to the pump set!
▷ Regularly check the cover plates, plastic components and other guards of
rotating parts for deformation and sufficient distance from rotating parts.
DANGER
Static charging due to insufficient potential equalisation
Explosion hazard!
▷ Make sure that the connection between pump and baseplate is electrically
conductive.
7.2.2.1 Checking the clearances
Clearances between impeller and casing
The back pull-out unit must be removed to check the clearances.
If the clearance is larger than permitted (see the following table), fit a new casing
wear ring 502.01 and/or 502.02.
The clearances given refer to the diameter.
Table13: Clearances between impeller and casing and between impeller and casing wear ring
Casing material Clearances
New Maximum permissible enlargement
G, D, E, Y 0,3mm 0,9mm
C, V 0,5mm 1,5mm
Plain bearing clearances
If the clearance is larger than permitted, replace the bearing bushes 545.21, 545.22,
thrust bearing 314 and bearing sleeves 529.21, 529.22.
NOTE
The dimension S1 can be checked by moving the impeller axially with the back pull-
out unit removed.
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