4-2
Cisco 1240 Connected Grid Router Hardware Installation Guide
OL-26223-04
Chapter 4 Opening the Router Chassis
Opening the Router Door
Safety Information
Before performing any of the tasks in this chapter, read the safety warnings in the “Installation Safety
and Site Preparation” chapter.
Captive Bolts
The router door features six captive, M8 bolts, shown in Figure 4-1.
Figure 4-1 Router Door, Showing Captive Bolts
Order of Loosening and Tightening Door Bolts
Cisco recommends that you loosen and tighten the door bolts in the order shown in Figure 4-2.
The chassis door features an environmental seal that protects the chassis against environmental elements
when the door is closed. This seal creates pressure, which can cause the door to open suddenly when the
last bolt is loosened.
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