Installing The Cage Nuts, If Needed; Installing The Large Mounting Shelf; Table 28: Open-Frame Rack Mounting Hole Locations - Juniper T4000 Hardware Manual

Installing the Cage Nuts, if Needed

Installing the Large Mounting Shelf

Copyright © 2013, Juniper Networks, Inc.
chassis, you use the center-mounting brackets attached to the chassis. If you front-mount
the chassis, you use the front-mounting flanges, and must remove the center-mounting
brackets.
Installing the Cage Nuts, if Needed on page 71
1.
Installing the Large Mounting Shelf on page 71
2.
Removing the Center-Mounting Brackets from the Chassis on page 72
3.
Removing the Spacer Bars on page 73
4.
Check that cage nuts are installed in the mounting holes specified in
1.
Table 28 on page 71.
Install cage nuts, if needed.
2.
Table 28 on page 71 specifies the mounting holes in which you insert the mounting screws
(an X indicates a mounting hole location), and cage nuts if needed. The hole distances
are relative to one of the standard U divisions on the rack. For reference, the bottom of
all mounting shelves is at 0.04 in. (0.02 U) above a U division.

Table 28: Open-Frame Rack Mounting Hole Locations

Hole Distance Above U Division
59 34.13 in. (86.7 cm)
53 30.63 in. (77.8 cm)
50 28.88 in. (73.3 cm)
44 25.38 in. (64.5 cm)
41 23.63 in. (60.0 cm)
35 20.13 in. (51.1 cm)
32 18.38 in. (46.7 cm)
31 17.75 in. (45.1 cm)
To install the large mounting shelf (see
On the rear of each rack rail, partially insert a mounting screw into the lowest hole
1.
specified in Table 28 on page 71
Install the large shelf on the rack. Rest the bottom slot of each flange on a mounting
2.
screw.
Chapter 7: Installing the T4000 Router Mounting Hardware
19.50 U
17.50 U
16.50 U
14.50 U
13.50 U
11.50 U
10.50 U
10.14 U
Figure 35 on page 72) in an open-frame rack:
for the large shelf.
Large Shelf
X
X
X
X
X
X
X
X
71