Multitech 1777.8/7-10 G3 - Manual (Page 17)

Caution
Grease lubrication Pump version V, MTC 100/125/150
(grease lubrication only)
Fig. 27
Oil lubrication with labyrinth seal Oil lubrication with lip seal
Multitec
17
7.3.3.2 Dismantling the drive-end rolling element bearings
N.B.: The ceramic bearing installed at the non-drive end need
not be dismantled in order to remove the drive-end rolling
element bearings. If the pump is oil-lubricated, the oil must be
drained before dismantling.
- After loosening the grub screw in the coupling hub pull out
coupling half with key 940.3.
Grease lubrication (figs. 26 and 27)
- Remove joint ring (V-ring) 411.7.
- Undo bolts 901.1.
- Remove bearing cover 360.1.
Oil lubrication with lip seal (fig. 28)
- Undo screws 914.4 and pull out together with washer 550.10
and O-ring 412.12.
- Remove bearing cover 360.2.
- Pull off sleeve 520.4 with ring 500.1 (tolerance ring) and
O-ring 412.11.
Oil lubrication with labyrinth seal (fig. 29)
- Pull out labyrinth ring 423.2.
- Undo screws 914.4 and pull out together with washer 550.10
and O-ring 412.12.
- Remove bearing cover 360.2.
The rotating unit is adjusted axially by means of
spacers 551.1. When reassembling the pump
after partial dismantling (bearing or seal replacement), the
same spacer discs 551.1 must be mounted on the bearing side
to reproduce the original rotor adjustment.
When dismantling keywayed nut 920.6, all relevant positions
such as sequence and orientation of the contact face must be
marked accordingly, to ensure identical reassembly (see also
section 7.4.4).
- Undo nut 920.2 with lockwasher 931 or nut with locknut
920.6, depending on the pump size. To undo the nut, hold
onto shaft with key 940.3.
- Pull off sleeve 520.1 with rolling element bearing(s) 320.1.
(The shaft is centered in the sleeve without locking device.)
- Remove spacers 551.1, see text above.
Note: Pump versions V, Vx, E, Ex, F, Fx of sizes 32, 50,65 do
not have a fixed bearing as this function is taken over by the
motor bearings.
On pump versions Multitec V100, 125 and 150 the fixed bearing
is located in the support lantern 342. Dismantling and
installation shall be performed in analogy with the horizontal
versions.
Fig. 26
Fig. 28 Fig. 29