TM11-7025-229-12
Section IV. REMOVAL AND REPLACEMENT PROCEDURES
4-13.
INTRODUCTION
Following are procedures for removing and replacing the disk unit and its components. Refer to the system manual for
system configuration removal and replacement requirements.
WARNING
The disk unit is a heavy piece of equipment. Always use four technicians when moving
or lifting the unit to prevent injury to personnel.
4-14.
REMOVING DISK UNIT
a.
Remove the HDA (para 2-7) and place it in a secure and clean location until needed. If the HDA is to be
stored, refer to chapter 5 for applicable packing instructions.
b.
If the disk unit is rack mounted, extend the unit out of the rack to its fullest position.
WARNING
Turn off power before working on equipment. Failure to do so can cause serious injury to
personnel.
c.
Disconnect disk unit's power cable from prime power source (para 4-16).
d.
Disconnect all I/O cabling from the disk unit (para 4-18). If applicable, disconnect all ground straps/cables.
Place dust caps over all connectors on the unit and disconnected cable connectors.
WARNING
The disk unit is a heavy piece of equipment. Always use four technicians when moving
or lifting the unit to prevent injury to personnel.
NOTE
If the disk unit is positioned in a counter-top (free-standing) configuration, the
performance of step e is not required.
e.
Lift unit out of the rack assembly and set it on a clean workbench or maintenance cart.
4-17
