Replacing The M40E Front Impeller Assembly; Removing The M40E Front Impeller Assembly - Juniper M40E Hardware Manual

M40e Multiservice Edge Router Hardware Guide

Replacing the M40e Front Impeller Assembly

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The front impeller assembly, which includes the craft interface, is located at the front of
the chassis above the FPC card cage, as shown in "M40e Chassis Description" on page 8.
The assembly weighs approximately 14.5 lb (6.6 kg). The assembly is hot-removable
and hot-insertable, as described in "M40e Field-Replaceable Units (FRUs)" on page 157.
The craft interface is attached to the front of the front impeller assembly. If you are
removing the front impeller assembly to replace it and the replacement assembly does
not have a craft interface already installed on it, you must transfer the craft interface
from the removed assembly to the replacement assembly.
If the replacement front impeller assembly already has a craft interface on it, perform
only the procedures in "Replacing the M40e Front Impeller Assembly" on page 172.
Removing the M40e Front Impeller Assembly on page 172
Removing the M40e Craft Interface from the Front Impeller Assembly on page 173
Installing the M40e Craft Interface on the Front Impeller Assembly on page 174
Installing the M40e Front Impeller Assembly on page 175

Removing the M40e Front Impeller Assembly

To remove the front impeller assembly (see Figure 87 on page 173):
Place an electrostatic bag or antistatic mat on a flat, stable surface.
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis. For more information about ESD,
see "Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series
Router" on page 232.
Using a Phillips screwdriver, loosen the captive screw at each corner of the craft
3.
interface.
Insert a flat-blade screwdriver into the gap around the craft interface and gently pry
4.
the impeller assembly forward until you can grasp the sides of the assembly and slide
it halfway out of the chassis.
CAUTION: To avoid injury, as you slide the assembly out of the chassis do
not touch any part of the impeller behind the front panel—the impeller
might still be spinning.
Place one hand under the assembly to support it. When the impeller is no longer
5.
spinning, slide the assembly completely out of the chassis and place it on the antistatic
mat or in the electrostatic bag.
If you are replacing the front impeller assembly and the replacement assembly has
6.
a craft interface panel installed on it, proceed to "Installing the M40e Front Impeller
Assembly" on page 175. Otherwise, proceed to "Removing the M40e Craft Interface
from the Front Impeller Assembly" on page 173.
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