Juniper Networks Hardware Manual page 78

M120 Multiservice Edge Router Hardware Guide
50
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To install the mounting shelves and spacer bars (see Figure 23 on page 51):
On the front rack rails, install cage nuts in the holes specified in Table 19 on page 49
1.
for the large shelf and the spacer bars.
On the front of each front rack rail, partially insert a mounting screw into the hole
2.
containing the lowest cage nut.
Install the large shelf on the front rack rails. Rest the bottom slot of each ear on a
3.
mounting screw.
Partially insert a mounting screw into the top hole in each ear of the large shelf.
4.
Tighten all the screws completely.
5.
The router is shipped with each spacer bar attached to the rear of each front-mounting
6.
flange. Remove each spacer bar by removing the five screws that fasten the spacer
bar to the front-mounting flange.
Place one of the spacer bars over an ear of the installed large shelf. Position the spacer
7.
bar so that its lower edge is just above the installed screw holding the large shelf.
Insert a mounting screw into each of the nonthreaded holes in the recesses of the
8.
spacer bar to secure the spacer bar. Each hole should have a cage nut behind it.
Repeat Steps 7 and 8 for the other spacer bar.
9.
Tighten all the screws completely.
10.
On the rear rack rails, install cage nuts in the holes specified in Table 19 on page 49
11.
for the small shelf.
On the back of each rear rack rail, partially insert a mounting screw into the hole
12.
containing the lowest cage nut.
Install the small shelf on the back rack rails. Rest the bottom slot of each ear on a
13.
mounting screw. The small shelf installs on the back of the rear rails, extending toward
the center of the rack. The bottom of the small shelf should align with the bottom of
the large shelf.
Partially insert screws into the open holes in the ears of the small shelf.
14.
Tighten all the screws completely.
15.
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