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9.6.1 Installation of Wilo-CronoNorm-NL
Shaft/bearing bracket
Version with mechanical seal
Version with stuffing box packing
Fig. 29: Example for a straight cut
Fig. 30: Example for a diagonal cut
Installation and operating instructions Wilo-CronoNorm-NL, NLG
DANGER! Risk of fatal injury!
Risk of fatal injury and risk of injuries to personnel and property
damage due to improper handling.
• The safety instructions and regulations according to chapter 2
"Safety" on page 55 and section 9.1 "Safety" on page 78 are to be
taken into consideration for all maintenance and repair work.
For shaft, see Fig. 23:
• Insert support disks (4.4) (only for bearing size 25) and roller bearings
(4.1A and 4.1B) on the shaft.
For bearing bracket, see Fig. 22:
• Push shaft in the bearing bracket.
• Fasten the bearing cover (6) with hexagon head bolts (16).
• Insert V seals (4.3) and push the thrower (4.2) onto the shaft.
• Insert the key (3.3).
See Fig. 18:
• Insert the key (3.2).
For version with the mechanical seal, see Fig. 19:
• Clean the counter ring seat in the housing cover.
• Insert the stationary part of the mechanical seal (9.1) carefully into
the housing cover (10).
• Screw the housing cover (10) onto the bearing bracket with the inter-
nal hexagon head bolts (15).
• Push the rotating part of the mechanical seal (9.1) onto the shaft.
• Push the spacer ring (9.2) onto the shaft.
Version with stuffing box packing:
CAUTION! Risk of damage to property!
Danger of damage to the pump due to improper handling.
• Make sure that the tight fit is reached on the stuffing box housing
and not on the sleeve.
• Check the surface of the shaft sleeve (see Fig. 21, item 11); many
score marks are an indication that it must be replaced. Before install-
ing, thoroughly clean all stuffing box parts.
If the packing is delivered in the form of a cord, this must be cut off.
• For this purpose, wind the packing helically around the shaft sleeve or
around a clamping chuck of the same diameter.
CAUTION! Risk of damage to property!
Danger of damage to the stuffing box sleeve due to improper han-
dling.
• Take suitable precautionary measures to avoid damaging the
stuffing box sleeve.
This way, the required visible gap between the sleeve and packing
ring is created during installation.For installation, pre-pressed graph-
ite packing rings are to be cut in half by means of two diagonal cuts
provided that the pump is not dismantled (see Fig. 29 / Fig. 30).
For version with the stuffing box packing, see Fig. 21:
• Push the shaft sleeve (11) onto the shaft.
• Insert the stuffing box housing (9.4) with seal (9.8) in the housing
cover (10).
• Install one of the packing rings (9.1) in the stuffing box housing (9.4)
and then
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