M588-00-880 Issue E
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Maintenance
8. The cooling water drain procedure is now complete. Disconnect the air supply, electrical supply and the drain
hoses. Dispose of the drained cooling water appropriately.
5.4 General maintenance
Do not use cleaning materials based on strong alkalis, aggressive or chlorinated solvents. Do not use cleaning
materials containing abrasives.
The following maintenance can be carried out on the dry pumping system between overhauls, contact Edwards for
details and training:
Check the oil level, see Section 5.4.1.
Inspect the connections, pipelines, cables and fittings, see Section 5.4.2.
Inspect and clean exhaust pipe, elbow and check valve.
5.4.1 Checking the oil levels and refilling
Ensure that the oil levels in the dry pump and the mechanical booster pump (where applicable) are correct. If
a pump oil level is incorrect, pump performance may be affected and the pump may be damaged.
The dry pump and booster (if fitted) each have two sight glasses. One is located on the end cover, refer to Figure 14,
and the other is located on the gearbox, refer to Figure 15. Note that the GXS750 dry pumping system has a gearbox
with a sight glass at each end and so Figure 15 applies to both ends. One is accessible from the left hand side of the
dry pumping system and the other is accessible from the right hand side.
GXS 450, 450/2600, 450/4200, 750, 750/2600 and 750/4200 dry pumping systems are provided with slots in the side
panels to enable the oil levels to be checked without removal of the side panels. To check oil levels on these systems:
1. Switch off the dry pumping system and allow it to stand for at least 5 minutes.
2. Check that the oil level is in line with the MAX indicator. If the oil level is below the maximum it must be topped
up.
All other GXS pumps require the dry pumping system side panels to be removed in order to check the oil level. To
check oil levels on these systems:
1. Switch off the dry pumping system and allow it to stand for at least 5 minutes.
2. Remove the side panels.
3. Check that the oil level is in line with the MAX indicator. If the oil level is below the maximum it must be topped
up.
Use of suitable protective gloves and eye protection is recommended when carrying out this
procedure. Personal protective equipment should be checked and used as specified by its supplier.
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