3Com LS8M1P12TEH Installation Manual page 168

Installation Manual
H3C S7500 Series Ethernet Switches
When drilling holes, hold the drill handle firmly with both hands, keeping the bit
perpendicular to the floor to prevent floor destruction and tilted holes.
All the holes must have a depth of 52 to 60 mm (2.0 to 2.4 in.). Use a vacuum cleaner to
clean the holes before measuring the depth.
If it is difficult to position the bit on hard, smooth floor, punch a small hole on the marks
before drilling.
Note that the precision of marking and drilling is essential to hardware installation. A low
precision can cause many problems during installation.
Caution:
The holes must be 52 to 60 mm (2.0 to 2.4 in.) deep. Otherwise, you will be unable to
fasten the expansion bolts.
III. Installing expansion tubes and nuts
Before installing expansion bolts, clean dust inside and around the holes with a vacuum
cleaner and then measure the spacing of holes. If the error is unacceptable, you need
to re-locate and drill mounting holes.
Follow these steps to install expansion tubes and nuts:
1) Remove the expansion tube and nut from an expansion bolt.
2) Mount the expansion tube on the expansion nut, with the guide ribs aligned with
the guide grooves.
3) Insert the expansion tube into a hole vertically.
4) Tap the expansion tube with a rubber hammer until the expansion tube completely
goes into the hole.
5) Repeat step 1 through step 4 to install other expansion tubes and nuts.
Figure A-9 illustrates how to mount an expansion tube on an expansion nut.
Appendix A B68-22 Cabinet Installation
A-7