Huawei DBS3900 Installation Manual page 70

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Installation Guide
Figure 6-12 Drilling holes and installing expansion bolts
Step 4 Lead the M6x50 screw through the washer, and then through the drilling holes of the plate to
the plastic expansion sleeve, and use a torque screwdriver to tighten the screw with a torque of
5 N•m, as shown in
Figure 6-13 Installing the plate
Step 5 Fit the four hooks of the pRRU3901 into the installation kits, as shown in
hooks are properly installed, a slight clack can be heard.
Issue 08 (2015-01-15)
Figure
NOTE
If the screws cannot be tightened using a Phillips screwdriver, use a hex key or an electric screwdriver to
assist the installation.
NOTE
It is recommended that you observe the installation from one side of the pRRU3901 when inserting hooks
into the kits.
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6-13.
6 Installing a pRRU3901
Figure 6-14. If the
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