© Edwards Limited 2012. All rights reserved.
Page 41
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
A705-61-880 Issue M
5.12
Replace the coupling insert
Use the following procedure to replace the coupling insert:
1. Refer to
. Undo the four bolts (13) which secure one of the coupling covers (12) to the coupling housing
(7), then remove the coupling cover.
2. Undo the four bolts (13) which secure the other coupling cover (12) to the coupling housing (7), then remove the
coupling cover.
3. Loosen the set screws (3) on the holding ring (17), then slide the holding ring off of the coupling insert (15).
4. Remove the coupling insert (15) and dispose of it: refer to
5. Fit the new coupling insert (15) to the gaps between the teeth on the drive hub (16) and coupling hub (14).
6. Turn the holding ring (17) so that the reference line on the holding ring is aligned with the split in the coupling
insert (15), then slide the holding ring over the insert.
7. Tighten the set screws (3) to secure the holding ring (17) in place.
8. Use the four bolts (13) to secure one of the coupling covers (12) to the coupling housing (7). Tighten the bolts to
a torque between 3 and 5 Nm (2.2 and 3.7 lbf ft).
9. Use the four bolts (13) to secure the other coupling cover (12) to the coupling housing (7). Tighten the bolts to a
torque between 3 and 5 Nm (2.2 and 3.7 lbf ft).
5.13
Relubricate the motor bearings
5.13.1
General requirements
You must only relubricate the pump-motor bearings if you have been suitably trained in all of the procedures required
to remove and refit the motor, to dismantle and reassemble the motor, and to relubricate the motor bearings.
Take note of the following when you relubricate the motor bearings:
Refer to the guidelines given in
for the relubrication intervals.
Use the procedures in this manual to remove and refit the motor.
Only use approved procedures to dismantle and reassemble the motor, and to relubricate the motor
bearings.
Edwards do not supply motor bearing grease. We recommend that you use Esso Unirex N3 grease to
relubricate 50 Hz motor bearings, and Chevron SRI No. 2 or Shell Oil Dolium-R to relubricate the 60 Hz
motor bearings.
Only relubricate the bearings if they are in a satisfactory condition. Use the amount of grease shown in
. Do not put too much grease into the bearings, or the motor may overheat.
WARNING
Do not relubricate the motor bearings unless you have been suitably trained in the necessary
procedures. If you are not suitably trained, you may damage the motor and it may not operate
correctly or safely.