Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Replace the Lower Impeller Assembly
M40 Internet Router Hardware Guide
158
Replace the Lower Impeller Assembly
The lower impeller assembly is located behind the craft interface at the front the chassis (see
Figure 1) and works together with the upper assembly to cool the Packet Forwarding Engine
components. It is hot-removable and hot-insertable.
Figure 1) and works together with the upper assembly to cool the Packet Forwarding Engine
components. It is hot-removable and hot-insertable.
To replace the fan tray, perform the following procedures:
Remove the Lower Impeller Assembly
The lower impeller assembly is located behind the craft interface at the front the chassis (see
Figure 1). It weighs approximately 9 lb (4 kg).
Figure 1). It weighs approximately 9 lb (4 kg).
To remove the lower impeller assembly, follow this procedure (see Figure 71):
1.
Remove the air filter, if it is installed on the chassis. For instructions, see “Remove the
Air Filter” on page 154.
Air Filter” on page 154.
2.
Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on
the chassis.
the chassis.
3.
Unscrew the three screws at the bottom edge of the assembly, using a Phillips
screwdriver if necessary.
screwdriver if necessary.
4.
Grasp the sides of the assembly, and slide it about halfway out of the chassis.
5.
Move one of your hands underneath the assembly to support it, and slide it completely
out of the chassis.
out of the chassis.
Figure 71: Remove the Lower Impeller Assembly
1023
Craft interface display
Impellers
Screws