Change or Add Vacuum Pump Oil

Drain the oil while the pump is warm and disconnected from the power source.

The pump must be removed from the analyzer to change the oil. Use oil supplied by Micromeritics or refer to the vacuum pump manual for other acceptable oils.

Unplug the vacuum pump from the power source.
Remove the exhaust filter by loosening the wing nut on the clamp between the vacuum pump exhaust filter and the mercury vapor filter.
Remove the centering ring and place to the side.

Remove the vacuum hose from the vacuum pump by loosening the wing nut on the clamp between the vacuum pump and the vacuum hose.

Remove the centering ring and place to the side.

Remove the pump from inside the analyzer.
Remove the vacuum pump from inside the analyzer .
at the top of the oil vapor trap. Swing the clamp open and remove the trap from the hose.

Grasp the handle on top of the vacuum pump and place the pump on a work surface.
Place a waste container under the drain spout.

Remove the drain plug and drain the oil into the waste container.
Replace the drain plug.
Remove the drain plug from the oil-fill port on top of the pump.

Slowly add oil to the port until the level is midway between the indicator lines in the oil-level window when the pump is running.

Do not allow oil to rise above the midway position when the pump is running. Doing so may cause oil to splash into the oil filter causing contamination.

Check the washer or O-ring used at the oil-filling port and replace if necessary.
Insert the oil-fill plug and turn clockwise to tighten.
Return the vacuum pump to the original position inside the analyzer.
Reconnect the vacuum pump hose.
Reconnect the exhaust filter to the top of the mercury vapor filter.
Reconnect the power cord to the power source.
Turn the vacuum pump on and recheck the oil level.
Allow the pump to run a few hours (overnight if possible) to eliminate air and moisture from the fresh fluid and to produce efficient vacuum operations.

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