Pull Out Element Disassembly - M Pumps CN SEAL-MV Series User Manual

Fig. 6.2
The lifting arm is not supplied with the pump. It must be ordered apart.
h) Raise the pullout element upward until the impeller clears the lower flange of the support head (6)
and remove through the large opening in the support head.
i) Remove the casing cover gasket (16) from the casing (1) or casing cover (9) and discard.
j) Move the pullout element to a safe, clean work area for further disassembly.

22.1.2. Pull Out Element Disassembly

All gaskets and O-rings removed during maintenance are to be discarded and replaced with new ones to
ensure proper sealing during subsequent operation.
As a reminder of the orientation of the casing cover and the bearing housing you might match mark
these parts before separating them;
however, the OUTLINE drawing shows the factory orientation.
To disassemble the pullout element, soft cable (or equivalent) and lifting equipment should be handy
and used for heavy parts. Proceed as follows:
a) Secure bearing housing (32) to workbench in a position that will allow impeller (7) and casing cover
(9) to be pulled away from shaft (12) and bearing housing (32).
b) Secure shaft (12) to prevent rotation.
The impeller cap nut (20) is left hand threaded. To remove the impeller cap nut, turn it to the right
(clockwise) while facing the impeller.
c) Untight the security dowel of the cap nut (20) and remove it from shaft.
d) Use heat, if necessary, on impeller (7) and remove it from shaft.
e) Remove impeller key (18.2).
f) Install the mechanical seal spacers to lock the shaft sleeve to the seal plate. Then loosen the set screws
which hold the shaft sleeve to the shaft.
Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX Pag. 35/49