Installing Cage Nuts, If Needed; Installing The Large Mounting Shelf And Spacer Bars - Juniper T640 Quick Start Manual

T640 Core Router Quick Start
Table 1: Four-Post Rack and Cabinet Mounting Hole Locations (continued)
Hole Distance Above "U" Division
33 19.01 in. (48.3 cm)
24 13.76 in. (34.9 cm)
15 8.51 in. (21.6 cm)
12 6.76 in. (17.1 cm)
9 5.01 in. (12.7 cm)
6 3.26 in. (8.3 cm)
3 1.51 in. (3.8 cm)
2 0.88 in. (2.2 cm)
8
10.86 U
7.86 U
4.86 U
3.86 U
4.86 U
1.86 U
0.86 U
0.5 U
To install the mounting hardware for a four-post rack or cabinet:
Installing Cage Nuts, If Needed on page 8
Installing the Large Mounting Shelf and Spacer Bars on page 8
Installing the Small Mounting Shelf on page 9
Removing the Center-Mounting Brackets on page 9

Installing Cage Nuts, If Needed

For racks without threaded holes, you must install cage nuts in the locations specified in
Table 1 on page 7:
On each front rack rail, install cage nuts for the large shelf and spacer bars.
On each rear rack rail, install cage nuts for the small shelf.

Installing the Large Mounting Shelf and Spacer Bars

On the front side of each front rail, partially insert a mounting screw into the lowest
1.
hole specified in Table 1 on page 7
Install the large shelf on the front side of the front rack rails. Rest the bottom slot in
2.
each flange on one of the mounting screws.
Tighten all the screws completely.
3.
Place one spacer bar over a flange of the large shelf.
4.
Partially insert a mounting screw into each of the nonthreaded holes in the recesses
5.
of the spacer bar.
Spacer
Large Shelf Bars
– x
– x
– x
– –
– –
– x
– –
x –
for the large shelf.
Copyright © 2015, Juniper Networks, Inc.
Small
Shelf
–
–
x
x
x
x
x
–