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# Installing a ERX14xx Model Air Filter

Air filters are hot-swappable; you do not have to power down the system to replace the filter. The filter is located behind the fan tray bezel located at the bottom of the front of the system. Remove the bezel to access the air filter. See Figure 46.

Figure 46: Installing an Air Filter into an ERX14xx Router

To install an air filter:

1. Ground yourself by using an antistatic wrist strap or other device and connect it to one of the ESD grounding jacks.
2. Remove the front bezel by grabbing the edges and pulling straight out toward you.
3. Unscrew the two captive screws on the air filter door and swing the door down to open it.
4. Remove the old air filter (if present).
5. Insert the new filter. Be sure the side with the plastic tab is toward you, the tab is on the bottom, and the mesh side is facing up.
6. After pushing the filter all the way in, pull down on the plastic tab and then gently snap front of filter up into the chassis.
7. Close the door, tighten the captive screws, and snap the bezel on.

   | Caution: Do not overtighten the screws.

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