HP Integrity BL860c i2 User's & Service Manual page 46

CAUTION:
Do not touch or come into contact with the thermal interface material.
Immediately install the heatsink.
CAUTION:
locking handle is fully back against the stops, rotated about 120° back. Also verify that the
plastic tabs on the processor heatsink are pulled fully out before installation.
5. Install the heatsink over the load posts.
CAUTION:
into place.
46 Optional components
During installation, after removing the protective cover from the heatsink:
To avoid damage to the server blade and processor, ensure the processor heatsink
Do not lower the heatsink locking handle before pushing the plastic locking tabs