Speck pumpen BADU 73 Serie Instructions De Montage Et D'utilisation page 25

Removing of the impeller:
In the BADU 73-1 single-stage model the impeller is screwed on to the motor
shaft (right-hand thread).
Put a screwdriver into the slot of the motor shaft (fan side) hold it and unscrew
the impeller.
In the BADU 73-2 two-stage model the suction impeller is also screwed on to
the discharge impellor (right-hand thread).
Disassembly of the aluminium ring:
It is not necessary to unscrew the pressure casing (107) from the motor (800).
Lever the aluminium ring by using a large screw driver (e.g. size 10) pressing it
against the outside wall of the aluminium ring.
Assembly:
Mounting of the new lock ring:
Slightly moisten the sleeve of the complete lock ring with soap water and press
it evenly with both thumbs into the pressure casing (107).
Also slightly moisten the impeller hub with soap water and press the mechani-
cal seal (433) onto the impeller hub regularly with both thumbs.
Re-assembly of the impeller:
Before the re-assembly of the impeller, clean the surface of the lock ring and of
the mechanical seal with alcohol or with a clean paper tissue.
The assembly is effected in reverse order (see Disassembly).
Tighten the 12 Allan screws (914.1) crosswise (tightening moment 3 Nm).
Do not use force!
7.4
CAUTION
If there is danger of freezing, the pump must be drained ahead of time. Also
drain all pipes subject to freezing.
8. In Case of Malfunction
The sealing between the motor and the pump housing is done by means of a
mechanical seal (433). It is normal that a few drops of water seep through once
in a while, especially during the break-in period. Depending on the nature of the
water and the duration of operation said mechanical seal may become leaky
after some time. If the water penetrates continuously, replace the complete me-
chanical seal by a new one (433), see item 7.3.
In case of malfunction we recommend contacting an expert first.
If ball bearings must be replaced, bearings with C3 air and high-temperature
grease (min. 180°C) are to be used!
When restarting the pump, refer to item 6.
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