A652-18-880 Issue C
Page 20 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
MAINTENANCE
Weekly checks:
z Ensure the cable gland is secure.
z Ensure that the motor fan cowl is clear.
z Ensure the pump and motor are clean.
z Check condition of drive couplings, in particular the coupling insert as per the specific pump manual and
ATEX coupling manual.
z Check that there is sufficient oil. Refer to the specific pump manual.
z Check the wiring.
z Check the integrity of the thermal trip.
Torque settings:
7.3 Control intervals of ATEX coupling insert (EM40/80/175/275)
The elastic insert of the ATEX coupling should be checked after the first 2000 hours or 6 months of operation. If no
wear is observed, following inspections should occur after every 4000 hours or 12 months of operation, whichever is
sooner.
If considerable wear is observed during the first inspection, it is advisable to change the elastic insert. The cause
should be determined, in accordance with the breakdowns table listed in the ATEX coupling’s installation and
maintenance manual supplied. Maintenance intervals must be adjusted accordingly to suit the changed operating
conditions.
Refer to Section 5.2 of the ATEX coupling’s installation and maintenance manual supplied, for details on acceptable
wear values of the AO and A1 type inserts.
The elastic insert of the ATEX coupling can be inspected easily during a scheduled downtime of the equipment, by
displacement of the holding ring. Some disassembly of the pump is required on the EM40 and EM80 pumps.
Tabl e 8 - Tor qu e set t ings
Torque setting (Nm)
Pump type Oil box screws
Sight glass
screws
Drain plug Oil filler plug Exhaust flange
RV3/5/8/12 10 - 12 10 - 12 1.0 - 1.5 2.0 - 2.5 6 - 7
EM18/28 11 - 13 7.5 - 8.5 1.0 - 1.5 2.0 - 2.5 6 - 7
EM40/80 11 - 13 6.5 - 7.5 N/a N/a N/a
EM175/275 11 - 13 9 - 11 N/a N/a N/a
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