7 Servicing/Maintenance
41 of 72
Sewatec (60 Hz)
7.2.3 Lubrication and lubricant change
DANGER
Excessive temperatures as a result of bearings running hot or defective bearing
seals
Fire hazard!
Damage to the pump set!
▷
Regularly check the rolling element bearings for running noises.
7.2.3.1 Lubricating the rolling element bearings
The rolling element bearings of the pump sets are grease-packed and maintenance-
free.
7.2.3.2 Changing the lubricant of the shaft seal
WARNING
Lubricants posing a health hazard and/or hot lubricants
Hazard to persons and the environment!
▷
When draining the lubricant take appropriate measures to protect persons and
the environment.
▷
Wear safety clothing and a protective mask if required.
▷
Collect and dispose of any lubricants.
▷
Observe all legal regulations on the disposal of fluids posing a health hazard.
WARNING
Screw plugs subjected to pressure
When opening screw plugs, fluid might spurt out!
▷
Wear safety goggles and protective clothing, if required.
▷
Open the screw plug slowly.
The lubricant chamber of the pump set is filled with an environmentally friendly,
non-toxic lubricant of medical quality.
Replace the lubricant every 10,000 operating hours but at least every three years.
Draining the lubricant
903.90
903.46
411.46
903.22
411.22
411.90
Fig. 13:
Draining the
lubricant
ü
A suitable container for the old lubricant is on hand.
1.
Place the container underneath screw plug 903.46.
2.
Remove screw plug 903.46 and joint ring 411.46 at the bottom of the bearing
bracket and drain off the lubricant.
3.
Fit screw plug 903.46 with new joint ring 411.46.
NOTE
Paraffin oil is bright and transparent in appearance. If the oil fill is severely
contaminated, this will suggest a defect on the mechanical seal.
▷
Replace the mechanical seal.