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## Maintaining the Router

This chapter lists the tools, items, and steps needed for installing and uninstalling router components. Other maintenance procedures must be performed by an authorized Juniper Networks technician.

This chapter contains the following sections:

- Required Tools and Items
- Storing Modules and Components
- Cleaning the System
- Upgrading NVS Cards on SRP Modules
- Replacing an NVS Card
- Replacing Fan Trays
- Installing an Air Filter
- Replacing a Power Distribution Unit

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