HPE ProLiant ML150 Gen9 User Manual page 37

Press and hold the processor retaining bracket in place, and then close each processor locking
14.
lever. Press only in the area indicated on the processor retaining bracket.
CAUTION: After the cover is removed, do not touch the thermal interface media.
Remove the heatsink cover.
15.
Install the heatsink:
16.
Position the heatsink on the processor backplate.
a.
Tighten one pair of diagonally opposite screws halfway, and then tighten the other pair of screws.
b.
Hardware options installation 37