TM 1-5855-265-20
B-5
B-3. MAINTENANCE FUNCTIONS (cont)
i. REPAIR
The application of maintenance services1, including fault location/troubleshooting2, removal/
installation, and disassembly/assembly3 procedures, and maintenance actions4 to identify troubles and
restore serviceability to an item by correcting specific damage, fault, malfunction, or failure in a part,
subassembly, module (component or assembly), end item, or system.
j. OVERHAUL
That maintenance effort (service/action) necessary to restore an item to a completely
serviceable/operational condition as prescribed by maintenance standards in appropriate technical
publications (i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the
Army. Overhaul does not normally return an item to like new condition.
k. 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 materiel 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.
1Services - inspect, test, service, adjust, aline, calibrate, and/or replace.
2Fault locate/troubleshoot - the process of investigating and detecting the cause of equipment
malfunctioning; the act of isolating a fault within a system or unit under test (UUT).
3Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of a spare/
functional group coded item to the level of its least componency identified as maintenance significant
(i.e., assigned an SMR code) for the category of maintenance under consideration.
4Actions - welding, grinding, riveting, straightening, facing, remachining and/or resurfacing.
