BOC Edwards A343-10-940, Instruction Manual

Page: 36 / 48

E1M18 and E2M18 Rotary Vacuum Pumps
MAINTENANCE
PAGE
30
Issue L 30 Sep 06
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 oil sight-glass (12) is between the MAX and MIN level marks on the
bezel of the oil sight-glass.
2. If the oil-level is near to or below the MIN level mark, remove the oil filler-plug (1) and pour more
oil into the reservoir until the oil reaches the MAX level mark. If the oil-level goes above the MAX
mark, remove the oil drain-plug (11) and drain the excess oil from the pump. Refit the oil drain-
plug. 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.
5.4 Replace the oil
Refer to Figure 1 for the items in brackets.
1. Operate the pump for approximately ten minutes to warm the oil, then switch off the pump. (This
lowers the viscosity of the oil and allows the oil to be drained from the pump more easily).
2. Isolate the pump from your electrical supply and disconnect it from your vacuum system.
3. Remove the oil filler-plug (1).
4. Place a suitable block under the pump-motor to tilt the pump and place a suitable container under
the oil drain-plug (gravity drain) (11). Remove the oil drain-plug and allow the oil to drain into the
container.
5. If the oil is dirty or contaminated:
• Refit the oil drain-plug and pour clean oil into the pump.
• Reconnect the pump to the electrical supply and operate the pump for about 5 to 10 minutes.
• Disconnect the pump from the electrical supply, remove the oil drain-plug and allow the oil
to drain out of the pump.
• Repeat this step until the oil reservoir is clean.
Operation Frequency Refer to
Section
Check the oil level As required; at least monthly 5.3
Replace the oil Every 3000 hours of operation 5.4
Inspect and clean the inlet filter Every oil change 5.5
Clean or replace the gas-ballast filter Yearly 5.6
Clean the motor fan-cover and enclosure Yearly 5.7
Clean and overhaul the pump Every 15000 hours of operation 5.8
Fit new blades Every 30000 hours of operation 5.9
Test the motor condition Every 15000 hours of operation 5.10
Table 9 – Maintenance plan