Cisco 8800 Series - Replace HVAC and HVDC Power Module

To prevent injury and damage to the equipment, always attach the ground and source DC power
cable lugs to the power tray terminals in the following order: (1) positive (+) to positive (+),
(2) negative (–) to negative (–).
Caution
Do not overtighten the nuts that secure the DC power cables to the power tray terminals. The
nuts should be tightened using the 7/16 hex socket and torque wrench to a torque of 45–50 in-lb.
Caution
Step 4 Replace the clear plastic safety covers over the DC power connection terminal studs and tighten the screws.
Step 5 Set the DC power source circuit breaker to ON (1).
Step 6 Set the power tray switch to ON (1).
Use this procedure only when reconnecting power to all power modules in a system that is powered
down completely.
Caution
Replace HVAC and HVDC Power Module
Follow these steps to remove HVAC and HVDC power modules from the chassis.
Procedure
Step 1 Do not Power OFF (0) the standby mode switch.
Hardware Installation Guide for Cisco 8800 Series Routers
130
Replace Chassis Components
Replace HVAC and HVDC Power Module