Maintenance
7.2.2 Roller bearings with oil lubrication
1. Carry out lubricating oil change:
– after the first 300 hours of operation
– after every 5000 hours of operation or at least once a
year
2. For oil changes, remove the screwed plug at the bearing
bracket and drain the lubrication oil at operating tempera-
ture into a suitable container.
3. Reinsert the screwed plug and top up lubricating oil
(→ 6.1.2 Lubricating the bearings, Page 21).
7.2.3 Stationary seal rings
Mechanical seal will always show some functional drip-
leakage (→ Manufacturer's instructions).
Double mechanical seal with quench: any dra stic rise of the
quench system level indicates a major leak at the product-
side mechanical seal.
Double mechanical seal ring with foreign blocking: any
drastic pressure drop in the blocking syste m (loss of
lubricating fluid) indicates a major leak at the product-side
mechanical seal.
If there is a major leak: replace t he mechanical seal with its
auxiliary seals and check the integrity of auxiliary operating
systems.
7.3 Disassembling
DANGER
Risk of injury due to running pump!
Do not touch the running pump.
Do not carry out any w ork on the running pump.
Isolate the motor from its supply voltage and keep it locked
in that state while carrying out any fitting or maintenance
work.
DANGER
Risk of death through electric shock!
Have all electrical work carried out by qualified electricians
only.
WARNING
Risk of injury and poisoning due to hazardous or hot
pumped media!
Use protective equipment when carrying out any work on
the pump.
Allow the pump to cool down completely before commenc-
ing any work.
Make certain that the pump is unpressurized.
Empty the pump, safely collect the pumped medium and
dispose of the medium in accordance with environmental
rules and requirements.
EN – 02 BA-2005.07 NPC series 25
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