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4. Assemble the rail with flat washers, spring washers, and nuts, but do not tighten the screws
yet.
5. Align the rail mounting holes with the mounting holes in the equipment rack.
6. Install the rail kit according to one of the following two options:
•
Aligned with the U mark - position the rail brackets in perfect alignment with the "U"
mark on the rack (requires 1U clearance below).
•
Above the U mark - position the rail brackets and align them with the hole above the "U"
mark on the rack (no need for 1U clearance below).
7. Attach the front side of the rail to the rack's front vertical side rail with 4 screws and the rear
side of the rail to the rack's rear vertical side rail with 4 screws.
8. Repeat the steps to assemble the other rail and mount it on the other side of the chassis. Once
completed, the rails are ready for chassis installation.
CAUTION: When mounting the rail ensure box-to-box vertical alignment on all four
rack rails. See that the bottom side of the rail is aligned with the 1U marking on the rack
rail.
4.1.1.3 Rail Kit Assembly Procedure in Detail
This section presents the procedure for assembling and mounting the rail kit. Each step is accom-
panied by a figure, showing the components as they appear being aligned and then assembled one
by one.
In addition, eight screw sets are included, comprising one screw, one nut, and two washers.
To assemble the rail:
1. Use 8-32 5/8" screws and flat washers and spring provided with the kit to assemble the Rail, position-
ing the insert in front of the bracket as shown in the following step.
2. For each of left and right, take a bracket and attach an insert panel (the two inserts are identi-
cal). At this stage, position the two parts to fit the distance between the rack rails of each side.
Figure 21: Assembling the Rail Bracket and Insert
Mellanox Technologies
Rev A04
47
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