Dell PowerEdge R740xd Installation And Service Manual page 123

NOTE: Ensure that the PHM is held parallel to the system board to prevent damaging the components.
2 Push the blue retention clips inward to allow the heat sink to drop into place.
3 Supporting the heat sink with one hand.
4 Using the Torx #T30 screwdriver, tighten the screws on the heat sink in the order below:
a Partially tighten the first screw (approximately 3 turns).
b Tighten the second screw completely.
c Return to the first screw and tighten it completely.
If the PHM slips off the blue retention clips when the screws are partially tightened, follow these steps to secure the PHM:
a Loosen both the heat sink screws completely.
b Lower the PHM on to the blue retention clips, follow the procedure described in step 2.
c Secure the PHM to the system board, follow the procedure described in step 4.
NOTE: The processor and heat sink module retention screws should not be tightened to more than 0.13 kgf-m (1.35 N.m
or 12 in-lbf).
Figure 71. Installing the processor and heat sink module (2U)
Installing and removing system components 123