Cisco ASR 1004 - Manual (Page 7)

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Step 5 Lift the chassis into position between the rack posts (requires two people).
Step 6 Align the mounting bracket holes with the rack post holes and attach the chassis to the rack. At this point, if there is a
third person, then that person can insert the screws while the other two people hold that chassis in place, unless the
chassis is resting on a shelf.
Step 7 Position the chassis until the rack-mounting flanges are flush against the mounting rails on the rack.
Note To allow space to attach the cable management brackets to the chassis in the rack easily, make certain that you use
the rack-mount bracket ear holes specified in the next steps.
Step 8 Hold the chassis in position against the mounting rails and follow these steps:
Tip Insert the bottom screw first and then the second screw at the top of the chassis diagonally from the bottom screw. This
helps secure the chassis in place while you insert the other screws.
a. Insert the bottom screw into the third hole up from the bottom of the rack mount ear and use a hand-held screwdriver
to tighten the screw to the rack rail.
b. Insert the top screw into the third hole down from the top of the rack mount ear and tighten the screw to the rack rail.
c. Insert a screw in the middle of the rack-mount bracket on both sides of the chassis.
d. Repeat these steps for the other side of the chassis.
Note As a result of using the specified rack-mount bracket ear holes, the cable management bracket can be easily attached
to the rack-mount bracket when the chassis is in the rack.
This completes the procedure for installing the chassis in the four-post rack. Proceed to the “Attach the Cable-Management
Bracket” section on page 9 to continue the installation.