Lenovo ThinkServer RD240 Rack Installation Instructions page 3

According to the length between the front post and
the rear post of the rack, adjust the length of rail by
moving the rear bracket of the rail 1 until the
pins at the front and rear of the brackets click into
the holes in the rack posts. When the pins are in
place, install the retaining screws on the front and
rear of the bracket.
Notes:
1. The stretching range of the outer guide rail is
740 mm (29.13 inches) to 910 mm (35.83 inches).
Confirm the size of the rack before the
installation.
2. The left and the right outer guide rails should
be fixed to the left and the right posts of the
rack at the same level.
3. If the holes in the post are square holes, you can
operate according to the above methods.
4. If the holes in the post are round holes, remove
the retaining screws and pins on the front and
rear brackets and install the pins shipped with
guide rails. Then install the retaining screws
shipped with guide rails to secure the guide
rails onto rack.
Place the server on the bearing bracket and push it
inside. While pushing the server, you have to
support the bottom of the server with hands to
avoid the drop of the server.
When the server is in place, install the two retaining
screws on the left and right handles to secure the
server on the rack.
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