TM-10-5411-231-13-P
CARGO BED COVER (CBC) HMMWV, TYPE I
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST (RPSTL)
AUGUST 2005
CHANGE 1
TM-10-5411-231-13-P - Page 87 of 128
TM 10-5411-231-13&P
CARGO BED COVER (CBC) HMMWV, TYPE I
0023 00
MAINTENANCE ALLOCATION CHART (MAC)
0023 00-3
Change 1
11. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely
serviceable/operational condition as required by maintenance standards in appropriate technical
publications.
Overhaul is normally the highest degree of maintenance performed by the Army.
Overhaul does not normally return an item to like new condition.
12. Rebuild. Consists of those services/actions necessary for the restoration of unserviceable
equipment to a like new condition in accordance with original manufacturing standards.
Rebuild is
the highest degree of material maintenance applied to Army equipment.
The rebuild operation
includes the act of returning to zero those age measurements (hours/miles, etc.) considered in
classifying Army equipment/components.
Explanation of Columns in the MAC
Column (1) Group Number.
Column (1) lists Functional Group Code (FGC) numbers, the purpose of
which is to identify maintenance significant components, assemblies, subassemblies, and modules with
the Next Higher Assembly (NHA).
Column (2) Component/Assembly.
Column (2) contains the names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column (3) Maintenance Function. Column (3) lists the functions to be performed on the item listed in
column (2). (For detailed explanation of these functions refer to
“Maintenance Functions” outlined above).
Column
(4) Maintenance Level. Column (4) specifies each level of maintenance authorized to perform
each function listed in column (3), by indicating work time required (expressed as man-hours in whole
hours or decimals) in the appropriate subcolumn.
This work time figure represents the active time
required to perform that maintenance function at the indicated level of maintenance.
If the number or
complexity of the tasks within the listed maintenance function varies at different maintenance levels,
appropriate work time figures are to be shown for each level.
The work time figure represents the average
time required to restore an item (assembly, subassembly, component, module, end item, or system) to a
serviceable condition under typical field operating conditions.
This time includes item preparation time
(including any necessary disassembly/assembly time), troubleshooting/fault location time, and quality
assurance time in addition to the time required to perform the specific tasks identified for the maintenance
functions authorized in the MAC. The system designations for the various maintenance levels are as
follows:
Field:
Sustainment
C
Operator or crew maintenance
O
Unit maintenance
F
Direct Support maintenance
L
Specialized Repair Activity
H
General Support maintenance
D Depot maintenance
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