A708-01-880 Issue E
Page 52 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
5. Inspect all of the electrical cables; check that they are not damaged and have not overheated. Replace any
cables that are damaged or have overheated. Check that all of the electrical connections are secure. Tighten
any loose connections.
6. Inspect all of the process and exhaust pipelines; check that they are not corroded or damaged. Replace any
pipelines that are corroded or damaged. Check that all of the process and exhaust connections are secure.
Tighten any loose connections.
5.8 Change the oil and oil filters, drain the vent filters, and clean
the oil level sight-glasses
5.8.1 Drain the end cover oil and clean the end cover sight-glasses
Note: There are two oil level sight-glasses on the end cover (Figure 1, 2 and 3, items 11). Clean both sight-glasses
when changing the oil.
1. Refer to Figure 1, 2 and 3. Remove the end cover oil filler plug and bonded seal (8): see Warning above.
2. Refer to Figure 10, detail B. Place a suitable container under the end cover oil drain plug (6); the container must
have a capacity of at least 7.5 litres.
3. Unscrew and remove the oil drain plug and bonded seal (6) and allow the oil to drain from the end cover. Dispose
of the bonded seal.
4. Refer to detail C. Undo and remove the four M5 screws (15) from the bezel (14) on one of the end cover oil level
sight-glasses.
5. Remove the bezel (14), O-ring (13), sight-glass (12), O-ring (11) and compression ring (10). Dispose of the O-rings
(11, 13).
6. Clean all of the sight-glass components and the sight-glass recess in the end cover (9) with a soft lint-free cloth.
If necessary, use a suitable cleaning solution; if using a cleaning solution, ensure that all of the solution is
removed before reassembling the sight-glass.
7. Refit the compression ring (10) in the sight-glass recess in the end cover (9).
8. Fit two new O-rings (11, 13) and the sight-glass (12), then fit the bezel (14) and secure with the four M5 screws
(15).
9. Repeat Steps 4 to 8 to clean the other end cover oil level sight-glass.
5.8.2 Change the end cover oil filter
1. Refer to Figure 10, detail B. Place a suitable container under the end cover oil filter (8), to catch any spilled oil.
2. Unscrew and remove the end cover oil filter (8) and gasket (7) from the filter port adaptor (5) on the end cover.
3. Dispose of the oil filter and gasket (8, 7) and the oil in the container: refer to Section 6.2.
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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