Front Fan Trays; Rear Fan Tray - Juniper G10 CMTS Hardware Manual

Front Fan Trays

To replace a front fan tray, follow this procedure (see Figure 45 on page 164).
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Rear Fan Tray

To replace a rear fan tray, follow this procedure (see Figure 46 on page 165).
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Remove the air intake faceplate by pulling the flanges on each side of the faceplate away
from the chassis until the faceplate ball studs are removed from the air intake faceplate
clips.
Each fan tray is held into place by a front fan tray retainer that resides on hinges. The
retainer contains a spring-loaded plunger that mates with the chassis when the retainer
is locked into position. To unlock the retainer, pull down on its plunger and swing it away
from the chassis until it comes to rest.
Grab the fan tray directly underneath the flange that houses its LED and slowly pull the
tray out of its bay until it is fully removed from the system. Figure 45 shows a populated
and an empty front fan tray bay in the chassis (the front fan tray retainer is not shown in
the empty bay and the air intake faceplate clips are not shown in either bay).
Align the edges of the fan tray replacement within the chassis fan tray rails. Ensure that
the fan tray edges are not seated above or below the rails, but are within the rails.
Slowly slide the fan tray completely into its bay until its power connector mates with its
corresponding midplane power connector. You should be able to see and hear the fans
operating within the tray.
You must return the front fan tray retainer to its locked position by pulling down on its
plunger, swinging the retainer toward the chassis, and releasing its plunger so that it
mates with the chassis. If the plunger cannot mate with the chassis, the fan tray is not
fully installed into its bay.
Replace the air intake faceplate by aligning its four ball studs with the four air intake
faceplate clips and pressing the faceplate towards the chassis until it snaps into place.
Loosen the eight self-contained screws that fasten the rear fan tray to the chassis.
Grasp the handles on each side of the fan tray and slowly pull the tray out of its bay until
it is fully removed from the system.
Align the fan tray replacement within the chassis. The rear fan tray flanges in the chassis
assure proper alignment within the bay.
Slowly slide the fan tray completely into its bay until its power connector mates with its
corresponding midplane power connector. You should be able to see and hear the fans
operating within the tray.
Manually fasten the eight self-contained screws of the rear fan tray to the chassis, then
apply 4 in-lb of torque to each of the eight screws.
Fan Trays
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Replacement Procedures 163