Cisco Aironet 1520 Series Mounting Instructions page 37

Closing the Access Point Hinged Cover
To close the access point cover, follow these steps:
When closing the access point cover, be careful not to pinch internal wires.
Step 1
Carefully position the cover flush with all sides of the access point, then slowly hand-tighten each bolt.
Step 2
When all bolts are hand-tightened, use a 13 mm closed-end wrench or socket to partially tighten the bolts
Step 3
in the tightening sequence shown in
Repeat
Step 4
(0.68 to 0.79 Nm).
Figure 24
78-18269-04
Step 3 using the same tightening sequence to fully tighten each bolt to 6 to 7 ft lbs
Hinged Cover Bolt Tightening Sequence
Cisco Aironet 1520 Series Outdoor Mesh Access Point Mounting Instructions
Figure 24. Tighten each bolt to 3 to 4 ft lbs (0.34 to 0.45 Nm).
Mounting the Access Point
37