Dell EMC PowerEdge R940 Installation And Service Manual page 68

Steps
1 To remove the air shroud from a two processor configuration system, hold the shroud at both ends and lift it out of the system.
Figure 21. Removing the air shroud — Two processor system
2 To remove the air shroud from a four processor configuration system:
a Remove the expansion card riser. See
b Hook the expansion card riser on the side of the system by using the bale on the expansion card riser.
CAUTION:
riser, ensure that you hook the riser to the system using the bale.
c Hold the shroud at both ends and lift it away from the system.
68 Installing and removing system components
Removing the expansion card riser
To avoid damage to the PCIe cables connected to the NVMe cards installed in the expansion card
.