Speck pumpen BADU Block Series, Installation & Operating Manual

Page: 87 / 104

7.4.5 Removing the back pull-out unit
WARNING
Back pull-out unit tipping over
Risk of squashing hands and feet!
▷
Suspend or support the back pull-out unit at the pump end.
✓
The notes and steps stated in (
⇨
Section 7.4.1 Page 33) to (
⇨
Section 7.4.4 Page
34) have been observed/carried out.
1. If required, suspend or support the back pull-out unit to prevent it from tipping
over.
2. Undo hexagon nut 920.1 at the volute casing.
3. Use forcing screws 901.30 to remove the back pull-out unit from its seat in the
volute casing. Pull the back pull-out unit completely out of volute casing 102.
4. Remove and dispose of gasket 400.10.
5. Place the back pull-out unit on a clean and level surface.
7.4.6 Removing the impeller
✓
The notes and steps stated in (
⇨
Section 7.4.1 Page 33) to (
⇨
Section 7.4.5 Page
35) have been observed/carried out.
✓
The back pull-out unit is kept in a clean and level assembly area.
1. Undo impeller nut 920.95 (right-hand thread).
2. Remove impeller 230 with an impeller removal tool.
3. Place impeller 230 on a clean and level surface.
4. Remove key 940.01 from shaft 210.
7.4.7 Removing the mechanical seal
✓
The notes and steps stated in (
⇨
Section 7.4.1 Page 33) to (
⇨
Section 7.4.6 Page
35) have been observed/carried out.
✓
The back pull-out unit is kept in a clean and level assembly area.
1. Remove shaft sleeve 523 with the rotating assembly of the mechanical seal
(primary ring) from shaft 210.
2. Remove the rotating assembly of the mechanical seal (primary ring) from shaft
sleeve 523.
3. Undo hexagon nuts 920.01 and 914.22, if any, on drive lantern 341.
4. Remove casing cover 161 from drive lantern 341.
5. Remove the stationary assembly of the mechanical seal (mating ring) from
casing cover 161.
6. Remove and dispose of gasket 400.75.
7.5 Reassembling the pump set
7.5.1 General information/Safety regulations
DANGER
Wrong selection of motor
Explosion hazard!
▷
Use an original motor or a motor of identical design from the same
manufacturer.
▷
The permissible temperature limits at the motor flange and motor shaft must
be higher than the temperatures generated by the pump.
7 Servicing/Maintenance
BADU ® Block 35 of 52