Nortel Passport 15000 Hardware Installation And Maintenance page 504

504 Chapter 17 Hardware procedures
241-1501-240 5.2S2
2 Insert the shelf above the cooling unit and between the frame uprights. Do
not let the shelf rest against the cooling unit.
3 While holding the shelf, align its 16 screw holes (8 per vertical side) on the
2 mounting ears with the previous holes on the frame uprights or rack's
adapter brackets. Ensure that the bottom holes are as close to the cooling
unit as possible without touching it.
4 Loosely fasten a screw through 1 of the top mounting holes on 1 upright
or adapter bracket. Loosely fasten the top screw on the other side.
If you use a pair of the eye holes that allows threading 2 screws before
placing the shelf assembly against the uprights, and then passing the
mounting ears over the screws to hang there until other screws are
fastened, you must use only the top two, thread at least four-fifths of the
each screw into the upright, and hang the shelf assembly on both screws
simultaneously. Otherwise the weight of the assembly can bend the
mounting ear.
5 Orient, place, and loosely fasten each cable mounting bracket back where
it was on top of the mounting ears of the shelf assembly.
6 Check that all remaining mounting ear holes are still aligned with the
previous upright or adapter bracket holes, then loosely fasten the
remaining screws through the shelf mounting ears.
7 From bottom to top, tighten all screws to snug plus a 1/4 turn.
8 When a door covered the front of the frame, put it back by doing the
procedure "Installing a door" (page 407).