TM 55-2840-254-23
g. 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 equipment
or system.
h. 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.
i. Repair. The application of maintenance services1, including fault location/troubleshooting2, re-
moval/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) prescribed to restore an item to a completely
serviceable/operational condition as required by maintenance standards in appropriate technical publica-
tions (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 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/compo-
nents.
Services - inspect, test, service, adjust, align, calibrate, and/or replace.
1
Fault locate/troubleshoot - The process of investigating and detecting the cause of equipment
2
malfunctioning; the act of isolating a fault within a system or unit under test (UUT).
Disassemble/assemble - encompasses the step-by-step taking apart (or breakdown) of a spare/func-
3
tional 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.
Actions - welding, grinding, riveting, straightening, facing, remachining and/or resurfacing.
4
B-4
