HP 5500 EI Series Installation Manual page 15

7. Install cage nuts (user-supplied) in the mounting holes in the front and rear rack posts.
8. Attach the rear mounting brackets to the rear posts with M6 screws (user supplied), as shown
in Figure 7.
Figure 7 Attaching the rear mounting brackets to a rack
(1) Rear square-holed post
9. One person supports the chassis bottom with one hand, holds the front part of the chassis with the
other hand, and pushes the chassis into the rack gently.
Make sure the load-bearing screws closely contact with the upper edges of the rear mounting
brackets, as shown in Figure 8.
10
(2) Rear mounting bracket