Huawei DBS3900 Installation Manual page 71

DBS3900 LampSite
Installation Guide
Figure 7-11 Drilling holes and installing expansion bolts
Step 4 Lead the M6x50 screws through the washers, and then through the drilling holes on the
mounting bracket to the plastic expansion sleeves, and use a torque screwdriver to torque the
screws to 5 N•m, as shown in
Figure 7-12 Installing the mounting bracket
Step 5 Fit the four hooks of the pRRU3901 into the mounting holes on the mounting bracket and
then press the pRRU3901 downwards until a click is heard. See
Issue 06 (2015-10-30)
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 good practice to perform the installation from the side view to promptly align the hooks with the
mounting holes.
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Figure 7-12.
7 Installing a pRRU3901
Figure 7-13.
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