B-2. MAINTENANCE FUNCTIONS (CONT)
of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument
Remove/Install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (component
or assembly) in a manner to allow the proper functioning of an equipment or system.
Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is
authorized by the MAC and is shown as the third position code of the SMR code.
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.
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 (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.
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 equipments/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.