SEAL-O-RING 1310074 - Caterpillar

Brake the flywheel.Brake the flywheel if the unit is going to be shut down over 20 minutes. Simultaneously press the "Ctrl" key and the "X" key on a PC that is connected to the UPS through UPS View.
Shut down the UPS.The UPS needs shut down before any work is done to the cabinet. Refer to the information in the Systems Operation, Testing and Adjusting, "UPS Shutdown".
When servicing or repairing electric power generation equipment:
Make sure the unit is either locked out or tagged DO NOT OPERATE.
Remove all fuses.
Make sure the generator engine is stopped.
Make sure all batteries are disconnected.
Make sure all capacitors are discharged.
Make sure residual voltage in the rotor, stator and the generator is discharged.Failure to do so could result in personal injury or death.
When servicing or repairing electric power generation equipment:Make sure the unit is off-line (disconnected from utility and/or other generators power service), and either locked out or tagged DO NOT OPERATE. Remove all fuses.
De-energize the UPS.All inputs to the UPS need de-energized. There are two possible inputs to the UPS. One of the inputs is in the Input/Output Cabinet. One of the inputs is in the Maintenance Bypass Cabinet.Note: The Maintenance Bypass Cabinet is an option.Open the breakers that are upstream to these two cabinets.Note: Opening the breakers that are upstream to the following cabinets will de-energize the customer load: Input/Output Cabinet and Maintenance Bypass Cabinet
Discharge the capacitors.Allow the capacitor banks in the UPS to purge for 10 minutes.
Unlock the doors. Open the doors.Use a 127.00 mm (5/16 inch) hex key on the upper and lower latches.
Remove metal safety shields.There are two metal safety shields covering the components in the cabinet. Remove the shields.