IBM 0551, Manual

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2.
Align the rail with the inside of the front and rear of the rack cabinet. The bottom of the rail support
ledge should be slightly above the U mark on the rack flange.
The rail comes with two spacers in the front bracket and two spacers in the rear bracket. If the rack
has round holes, the spacers on the rail brackets fit into the round holes in the rack flanges. If the rack
has square holes, replace the set of small spacers on the front and rear of the rail with the larger
spacers that come with the rail kit.
3. Secure the rail to the front of the rack cabinet with one M5 screw in the top hole of the bracket. For
racks with square holes, add one washer between the M5 screw and the rail bracket.
Figure 69. Extending the system rails
Figure 70. Attaching the system rails
Chapter 3. Installing a system or expansion unit into a rack
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