Juniper M120 - Replacing Line Card Components; Replacing an M120 FPC

CHAPTER 25
Replacing Cooling System Components
•
Replacing an M120 Air Filter on page 187
•
Replacing an M120 Fan Tray on page 190
Replacing an M120 Air Filter
The router has one air filter that installs horizontally below the front lower fan tray within
the air intake plenum. The air filter is hot-insertable and hot-removable.
To replace an air filter, perform the following procedures:
•
Removing the M120 Air Filter on page 187
•
Installing the M120 Air Filter on page 188
Removing the M120 Air Filter
The air filter is located in the front of the chassis below the FPC card cage. The air filter
weighs approximately 1 lb (0.5 kg).
To remove the air filter (see Figure 63 on page 188):
1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
2. Unwrap any PIC cables from the spools on the cablemanagement system and remove
the cables from the tray. Arrange the cables so that they do not block the front of the
cable management system and tray, and secure them with temporary fasteners so
that they are not supporting their own weight as they hang from the connector.
CAUTION: Do not let fiber-optic cable hang free from the connector. Do
not allow fastened loops of cable to dangle, which stresses the cable at
the fastening point.
3. Simultaneously pull the two releases labeled PULL on the cable management system.
Lift it up and outward to lock it in place to access the air filter.
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