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Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Installation Guide
OL-6256-17
Chapter 2 Installing and Removing Power Components
How to Install or Remove Fixed Configuration Power Components
Required Tools and Equipment
You need the following tools to perform this task:
• ESD-preventive wrist strap
• 3/8 in. ratchet wrench with 10-mm socket
• 3/8 in. ratchet wrench with 8-mm socket or open (box end) wrench
Steps
To remove a fixed configuration PDU, perform the following steps:
Step 1 Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
sockets on the rear (MSC) side of the chassis or a bare metal surface on the chassis.
Step 2 Turn the DC PEM or AC rectifier power switch to the off position.
Step 3 Disconnect the PDU from the power source.
Step 4 Remove the DC PEM or AC rectifiers from the PDU that you are removing from the chassis (see the
“Removing a DC PEM or AC rectifier” section on page 2-23).
Step 5 For fixed configuration DC only, remove the power cables and ground cable connected to the rear of the
DC PDU. See the “Removing DC PDU Wiring” section on page 2-21.
Step 6 On the rear (MSC) side of the chassis, Use the socket wrench to remove the 8-mm center holding bolt
and 8-mm nut from the PDU holding plate.
Step 7 Remove the PDU holding plate.
a. Use the socket wrench to unbolt the four 8-mm bolts (two for each side) that attach the holding plate
to the interior of the side of chassis.
b. Use the socket wrench to unbolt the eight 10-mm bolts (four for each PDU) that attach the holding
plate to the top of the PDUs.
c. Carefully remove the holding plate from the top of the PDUs and set it aside.
Step 8 Grasp the PDU and lift it carefully over the lip at the back of the chassis and set it carefully aside.
Caution Do not lift the PDU by the power cord—doing so can damage the PDU or the cord.
What to Do Next
After performing this task, you may install a new PDU, if needed (see the “Installing a PDU” section on
page 2-15), and replace any cosmetic covers.