A708-01-880 Issue E
Page 48 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
The plan in Table 15 (page 49) details the maintenance operations that must be carried out for CDX pumps which are
part of an ATEX system, and the maintenance operations Edwards recommends to maintain non-ATEX CDX pumps and
IDX pumps in normal operation. Instructions for each operation are given in the section shown.
In practice, the frequency of maintenance of IDX and non-ATEX pumps is dependent on the process. In clean
processes, the frequency of maintenance operations can be decreased; in harsh processes, the frequency of
maintenance operations may have to increase. Adjust the maintenance plan for IDX and non-ATEX pumps according
to experience.
When maintaining the pump, use Edwards maintenance and service kits. These contain all of the seals and other
components necessary to complete maintenance operations successfully. The Item Numbers of these kits are given
in Section 7.3.
5.3 Check the oil levels
Note: If pouring oil into the gearbox or end cover frequently, or if there is a sudden loss of a large amount of oil,
this may indicate that the pump has a fault. In these circumstances, Edwards recommends shutting down
the pump as soon as possible and contact the supplier or Edwards for advice.
5.3.1 Check the gearbox oil level
Figure 1, 2 and 3 show the locations of the two gearbox oil level sight-glasses (18).
1. Refer to detail D. With the pump running, check that the pump gearbox oil level is between the MIN and MAX
mark on the bezel (26) of either of the two oil level sight-glasses. If the oil level is below the MAX mark,
continue at Step 2, otherwise continue at Section 5.3.2.
2. If the pump is operating, shut down the pump: (refer to Section 4) and allow the pump to cool.
3. Remove the gearbox oil filler plug and bonded seal (4): see Warning above.
4. Fit a suitable funnel or nozzle to the oil filler port, then pour oil into the pump gearbox until the oil level fills
the oil level sight-glass (see detail D).
5. If the gearbox is overfilled: place a suitable container under the gearbox drain plug (Figure 10, item 3); unscrew
and remove the drain plug and bonded seal and allow the oil to drain from the gearbox, then refit and tighten
the drain plug and bonded seal.
6. Remove the funnel or nozzle from the oil filler port, then refit the oil filler plug and bonded seal (4).
5.3.2 Check the end cover oil level
The gearbox may be pressurised. To remove the oil filler plug, undo it slowly until the vent hole
is visible, allow the gearbox to vent to atmosphere to reduce the pressure in the gearbox, then
fully undo and remove the oil filler plug. If not, hot (up to 115 °C, 239 °F) oil may be ejected under
pressure from the gearbox and cause injury.
The end cover may be pressurised. To remove the oil filler plug, undo it slowly until the vent hole
is visible, allow the end cover to vent to atmosphere to reduce the pressure in the end cover, then
fully undo and remove the oil filler plug. If not, hot (up to 115 °C, 239 °F) oil may be ejected under
pressure from the end cover and cause injury.
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