English
40
WILO SE 09/2013
• Rotate the coupling/shaft in such a way that the four hexagon socket
screws (twist guard; Fig. 2 Item 1) are opposite the cover drilled holes.
• Unscrew the hexagon socket screws (locking pins) one after the other
far enough that the head is countersunk half way in the cover collar
(Fig. 2).
• Unscrew the four cover screws (Fig. 3).
• Screw in two of the cover screws up to the stop into the press-off
drilled holes to press the cover out of its seat (Fig. 3, 4).
• Unscrew one of the coupling screws and turn it all the way into one of
the installation drilled holes (Fig. 5, Item 1). To do this, the coupling
half is fixed by the retaining washer (Fig. 5, Item 3) at the impeller
shaft.
• Unscrew the remaining coupling screws and take off the loose cou-
pling half. If need be, use the provided press-off drilled holes (Fig. 5,
Item 4). The impeller shaft is now held up by the motor shaft washer
(Fig. 6, Item 1).
• Unscrew the hexagon screw (Fig. 6, Item 2) at the motor shaft to
lower the retaining washer (Fig. 6, Item 1), thereby lowering the
impeller/impeller shaft (Fig. 6, Item 3). When the impeller has been
completely lowered (Fig. 7, after a travel of about 5 mm), completely
take out the hexagon screw and the retaining washer.
• Unscrew the coupling screw out of the installation drilled hole and
remove the remaining coupling half (Fig. 8). If need be, use the pro-
vided press-off drilled holes.
• Unscrew the central screw (Fig. 9, Item 2) of the impeller shaft and
remove it with the retaining washer (Fig. 9, Item 3).
• Take out both impeller shaft keys (Fig. 9, Item 1).
• Carefully pull off and remove the mechanical seal (Fig. 10) from the
impeller shaft.
Installation
Installation:
NOTE:
Thoroughly clean the sliding/seat surfaces of the impeller shaft and
the lantern. If the shaft is damaged, it must be replaced.
Always use new screws for the twist guard.
Replace the O-rings in the cover groove and in the shaft bushing
groove
with new ones.
• Completely screw in a cover screw (Fig. 11, Item 1) into each of the
two press-off drilled holes of the cover.
• Be sure that all hexagon socket screws (locking pins) are countersunk
half way into the cover collar (Fig. 11).
• Put the mechanical seal onto the impeller shaft in such a way that the
four drilled holes for the cover screws are opposite the threads
(Fig. 12). Push the mechanical seal on until the push-off screws are on
the housing. a commercially available washing-up liquid can be used
as a lubricant.
• Check the keys in the motor shaft for correct seating.
• Push the motor shaft retaining washer on and fix with central screw
(Fig. 13).
Ensure that the motor shaft retaining washer is well seated when the
central screw is completely screwed in and that the central screw
thread bears at least 12 mm in the motor shaft thread in this position.
In case necessary, use the supplied washers.
• By unscrewing the central screw, lower the retaining washer of the
motor shaft by about five mm (Fig. 13).
• Put the first key (Fig. 14, Pos. 1) in the impeller shaft, put on the
retaining washer (Fig. 14, Pos. 2) of the impeller shaft and screw in the
hexagon screw (Fig. 14, Pos. 3)
by hand
.
Summary of Contents for CronoLine IL 250 Series
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