Micromeritics TriStar II 3020 Operator's Manual page 242

Preventive Maintenance
2. Loosen the wing nut on the clamp at the top of the oil vapor trap. Swing the clamp open and
remove the trap from the hose.
3. Grasp the handle on top of the vacuum pump and place it on a work table.
If adding oil, skip to step 5.
4. Drain the used oil:
a.) Place a waste container under the drain spout.
b.) Remove the plug from the drain spout and allow the oil to drain into the waste container.
c.) Replace the drain plug.
9-8
TriStar II 3020
302-42828-01 - Dec 2012