7 Servicing/Maintenance
45 of 72
Sewatec (60 Hz)
WARNING
Components with sharp edges
Risk of cutting or shearing injuries!
▷
Always use appropriate caution for installation and dismantling work.
▷
Wear work gloves.
NOTE
For further dismantling the pump casing may remain installed in the piping.
1.
Disconnect the power supply (e.g. at the motor).
2.
Disconnect and remove all auxiliary pipework.
3.
Remove coupling guard 681.
4.
Remove the coupling spacer of coupling 848, if any.
5.
Drain the oil .
7.4.3 Separating the pump from the piping
The pump can be dismantled without removing the pump casing from the pipeline.
Exception: When removing or re-fitting a casing wear ring or wear plate.
DANGER
Insufficient preparation of work on the pump (set)
Risk of personal injury!
▷
Properly shut down the pump set.
▷
Close the shut-off elements in the suction line and discharge line.
▷
Drain the pump and release the pump pressure.
(
ð
Section 7.3, Page 43)
▷
Shut off any auxiliary feed lines.
▷
Allow the pump set to cool down to ambient temperature.
NOTE
After the pump set has been removed from the piping, the suction casing should be
cleaned with water. Suitable protective clothing is recommended.
7.4.4 Removing the back pull-out unit
902.01
920.01
330
210
230
901.61
550.61
101
Fig. 15:
Removing the back
pull-out unit
ü
The lubricant chamber has been drained of all lubricant.
ü
Transport and lifting equipment are available.
ü
An area for the back pull-out unit has been prepared.
1.
Remove the coupling guard.
2.
Remove the coupling spacer, if any.
3.
Remove the drive, if required.
4.
Loop a rope tightly around the bearing bracket.
5.
Undo bolts 901.61 and discs 550.61 fastening the support foot.
6.
Undo screwed connections 902.01 and 920.01 and pull the complete back pull-
out unit consisting of bearing bracket 330, shaft 210 and impeller 230 out of
pump casing 101.
7.
Place the back pull-out unit in a safe and dry assembly area and secure it against
tipping over or rolling off.
