A366-04-880 Issue A
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Maintenance
5.2 Maintenance plan
The plan shown in Table 2 details the routine maintenance operations necessary to maintain your pump in normal
use. Instructions for each operation are given in the section shown.
More frequent maintenance may be required if you use your pump with gas-ballast or to pump corrosive or abrasive
gases and vapours. If necessary, adjust the maintenance plan according to your experience.
When you maintain the pump, use Edwards spares and maintenance kits; these contain all of the components
necessary to complete maintenance operations successfully. The Item Numbers of the spares and kits are given in
Section 7.
Examine the condition of any external accessories, filters or traps (if fitted). Refer to the instructions supplied with
these accessories for maintenance procedures.
5.3 Check the oil-level
Note: If required, you can check the oil-level while the pump is operating, however you must switch off the pump
and isolate the pump and other components in the pumping system from the electrical supply before you
pour oil into the pump.
Refer to Figure 1 for the items in brackets.
1. Check that the oil-level in the sight-glass (9) is between the MAX and MIN level marks indicated on the bezel of
the sight-glass (see Figure 4).
2. If the oil-level is near to or below the MIN level mark, remove the oil filler-plug (3) and pour more oil into the
reservoir until the oil reaches the MAX level mark. If the oil-level goes above the MAX mark, open the oil drain-
tap (10) and drain the excess oil from the pump. Refit the oil filler-plug.
3. If the oil is contaminated, drain and refill the pump with clean oil as described in Section 5.4.
Table 2 - Maintenance plan
Operation Frequency Refer to Section
Check the oil-level Weekly 5.3
Replace the oil 6 months 5.4
Clean the fine oil-filter Every 3000 hours 5.5
Replace the gas-ballast filter Every 3000 hours 5.6
Inspect and clean the inlet-filter Yearly 5.7
Clean the motor fan cover Yearly 5.8
Clean and overhaul the pump Yearly 5.9
Test the motor condition Yearly 5.10
Fit new blades 3 years 5.11
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