Huawei RRU3971 Installation Manual page 75

Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so that
the mounting brackets are secured onto the U-steel, as shown in
Tighten the nuts on the two square-neck bolts simultaneously. After the main and auxiliary
brackets are secured properly, measure the spacing between the brackets on both sides and ensure
that the spacing is the same on the two sides.
Figure 7-25 Securing the RRU mounting brackets
Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the
RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws
to 5 N·m (44.25 lbf·in.), as shown in
Issue ()
NOTICE
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 7-26.
7 Installing the RRU
Figure 7-25.
66