English
Installation and operating instructions Wilo-CronoNorm-NL, NLG
33
Bearing bracket
Bearing bracket:
See Fig. 28:
• Remove the pump base (8.1) by loosening the hexagon screw (8.2).
• Remove the key (3.3).
• Loosen the hexagon head bolts (15) and remove the bearing cover
(11) on the motor side.
• Remove the thrower (6.8).
• Loosen the hexagon head bolts (14) and remove the bearing cover
(10) on the pump side.
• Pull the shaft (3.1) part-way out of the bearing bracket.
• If present, pull off the exterior spacer ring (6.5).
• Loosen the lock nut (6.7) and remove the spring disk (6.6).
• If present, pull off the interior spacer ring (6.4).
• Pull the shaft (3.1) part-way out of the bearing bracket until the cir-
clip (6.3) is accessible.
• Remove the circlip (6.3) using circlip pliers.
• Remove the shaft (3.1) completely out of the bearing bracket.
• Pull the bearings (6.1 and 6.2) off of the shaft.
Stationary wear rings:
The Wilo-CronoNorm-NLG is standard-equipped with exchangeable
stationary wear rings. During operation, the gap backlash increases
due to wear. The period of use of the rings depends on the operating
conditions. The decreasing volume flow and increasing current con-
sumption of the motor in the course of operation could be caused by
an impermissibly high gap backlash. In this case, exchange the sta-
tionary wear rings.
9.6
Installation
General
Installation must be done based on the detailed drawings in section
9.5 “Dismantling” on page 28 as well as the general drawings in sec-
tion 11 “Spare parts” on page 41.
Check O-rings for damage and replace them, if necessary.Flat gaskets
are to be replaced as a matter of principle.
The components are to be cleaned and checked for wear before
installation. Damaged or worn parts must be replaced with original
spare parts.
Location points are to be coated with graphite or something similar
before installation.
Fig. 28: Bearing bracket
6.2
6.3
3.1
6.1
8.1
8.3
8.4
8.2
9
6.8
14
10
6.4 6.5 6.6 6.7 11 15 3.3
