Maintenance / servicing
51
BA.10A.CNY.001.01.10.GB
8. Insert the O-ring 0412.12 into the diffusor casing
0112.02.
Fig. 67
Second O-ring
9. Insert the O-ring 0412.22 into the impeller
0230.02.
Fig. 68
Impeller O-ring
10. Fit the second Impeller 0230.02
Fig. 69
Second impeller
To mount the following pump stages follow steps
6 to 9.
Take the different part numbers of impellers, dif-
fusor casings and O-rings for impellers and diffu-
sor-casings into account.
*
The pump can be equipped with two different types
of impeller nuts:
•
impeller nut with threaded insert
•
impeller nut with lock washers
This manual describes the procedure to mount the
impeller nut with lock washers
.
If the pump is equipped with an
impeller nut with a
threaded insert
take the following into account:
•
As the impeller nut is being fitted, it must be pos-
sible to feel the self-locking action. It must be
possible to tighten the nut without any problems.
Tighten manually for the first two turns, so that
the helicoil insert sits correctly on the shaft.
•
The O-ring seal 0412.04 of the impeller nut
0922.00 must be wetted with water during
assembly so that it is not squeezed out of the
groove when the nut is tightened.
•
Tightening torques:
M10 - 20 Nm (Contra I)
M20 - 150 Nm (Contra II)
11. Grease the Nord-Lock washer 0930.00 by using
Klüberpaste UH1 96-402 from the HILGE
assembly tool kit pos. 6 Fig. 81.
Fig. 70
Nord-lock washer
12. Grease Nord-Lock washers as shown in fig. 71.
Fig. 71
Schema of Nord-Lock washer greasing
• 0230.00 impeller
• 0412.04 O-ring
• 0922.00 impeller nut
• A - fine toothing greased
• B - thick toothing against each other - greased
A
B
A
0922.00
0230.00
0412.04
