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    Replacing the M40e Front Impeller Assembly

    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. 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).

    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.

    Removing the M40e Front Impeller Assembly

    To remove the front impeller assembly (see Figure 1):

    1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
    2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect 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.
    3. Using a Phillips screwdriver, loosen the captive screw at each corner of the craft interface.
    4. Insert a flat-blade screwdriver into the gap around the craft interface and gently pry 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.

    5. Place one hand under the assembly to support it. When the impeller is no longer spinning, slide the assembly completely out of the chassis and place it on the antistatic mat or in the electrostatic bag.
    6. If you are replacing the front impeller assembly and the replacement assembly has a craft interface panel installed on it, proceed to Installing the M40e Front Impeller Assembly. Otherwise, proceed to Removing the M40e Craft Interface from the Front Impeller Assembly.

    Figure 1: Removing the Front Impeller Assembly

    Image g001916.gif

    Removing the M40e Craft Interface from the Front Impeller Assembly

    If you are replacing the front impeller assembly and the replacement assembly does not have a craft interface panel on the front, you must transfer the craft interface from the removed assembly to the replacement assembly. To remove the craft interface from the removed impeller assembly:

    1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect 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.
    2. Place the removed and replacement impeller assemblies top side up on antistatic mats.
    3. If not immediately transferring the craft interface panel to the replacement assembly, place an antistatic mat or electrostatic bag on a flat, stable surface to receive it.
    4. Using a Phillips screwdriver, remove the screws from the three semicircular metal tabs on the back of the craft interface that secure it to the impeller assembly (see Figure 2). Save the screws.
    5. Grasp the ends of the craft interface, pull upward to release the hooks on the back of it from the windows on the front of the impeller assembly, then pull it toward you to free the craft interface completely (see Figure 3). If not immediately transferring it to a replacement impeller assembly, place it in the electrostatic bag or on the antistatic mat.

    Figure 2: Removing the Screws Along the Top Front Edge of the Front Impeller Assembly

    Image g001592.gif

    Figure 3: Removing the Craft Interface

    Image g001594.gif

    Installing the M40e Craft Interface on the Front Impeller Assembly

    To attach the craft interface to the front impeller assembly:

    1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect 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.
    2. Place the replacement impeller assembly top side up on an antistatic mat on a flat, stable surface.
    3. Attach the craft interface to the front of the impeller assembly, making sure that the hooks on the back of the craft interface clip securely into the windows on the front of the impeller assembly (see Removing the M40e Craft Interface from the Front Impeller Assembly).
    4. Align the holes in the three semicircular metal tabs on the back of the craft interface with the corresponding holes in the top of the impeller assembly.
    5. Insert the screws you saved when removing the craft interface into the three holes and tighten using a Phillips screwdriver (see Removing the M40e Craft Interface from the Front Impeller Assembly.

    Installing the M40e Front Impeller Assembly

    To install the front impeller assembly (see Figure 4):

    1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect 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.
    2. Grasp the sides of the impeller assembly and align the rear of the assembly with the guides inside the chassis.
    3. Slide the impeller assembly all the way into the chassis.
    4. Using a Phillips screwdriver, tighten the captive screw at each corner of the craft interface.

    Figure 4: Installing the M40e Front Impeller Assembly

    Image g001917.gif

    Published: 2010-10-28