Edwards Pump E2M30

Change the run capacitor as per the maintenance plan

Replace the run capacitor using the instructions supplied with the capacitor kit

Refer to Table 12, Section 7.3 for additional guidance

Test the earth (ground) continuity of the pump-motor

Is the earth (ground) continuity less than 0.1 Ω?

Test the insulation resistance of the pump-motor

Is the insulation resistance greater than 10 MΩ?

Replace the motor if it fails the continuity or insulation resistance tests

Disconnect the pump from the electrical supply

Use a dry cloth to remove dirt from the fan-cover

Use a brush to remove deposits from the enclosure

Is the fan-cover clean and free of dirt?

Is the enclosure free of deposits?

Operate the pump for approximately ten minutes to warm the oil, then switch off the pump.

Isolate the pump from the electrical supply and disconnect it from the vacuum system.

Remove the oil filler-plug (1).

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.

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.

Is the pump switched off and isolated from the electrical supply before pouring oil?

Check the oil-level in the oil sight-glass (12) and ensure it is between the MAX and MIN level marks.

Is the oil-level 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.

Is the oil-level above the MAX mark after refilling?

Remove the oil drain-plug (11) and drain the excess oil from the pump.

Ensure the gas-ballast filter is not connected to a gas supply or valve.

Remove the retainer circlip (3).

Remove the protective wire mesh (2) and filter elements (1).

Wash the wire mesh and filter in a suitable cleaning solution.

Allow the wire mesh and filter to dry completely before replacing them in the pump.