Juniper MX960 Hardware Manual page 525

CAUTION:
to accept the full weight—up to 18.35 lb (8.3 kg)—as you slide the MPC out of
the chassis.
When the MPC is out of the chassis, do not hold it by the ejector handles, bus
bars, or edge connectors. They cannot support its weight.
Do not stack MPCs on top of one another after removal. Place each one
individually in an electrostatic bag or on its own antistatic mat on a flat, stable
surface.
11. If necessary, remove each installed MIC from the MPC.
12. After you remove each MIC, immediately place it on an antistatic mat or in an electrostatic bag.
13. If you are not reinstalling an MPC into the emptied line card slots within a short time, install a blank
DPC panel over each slot to maintain proper airflow in the card cage.
CAUTION:
before reinserting it or inserting an MPC into a different slot.
The weight of the MPC is concentrated in the back end. Be prepared
After removing an MPC from the chassis, wait at least 30 seconds
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