The maintenance functions are defined as follows:
A - INSPECT. To determine serviceability of an item by comparing its physical, mechanical and electrical
characteristics with manufacturer standards.
B - TEST. To, verify serviceability and to detect electrical or mechanical failure by use of test equipment.
C - SERVICE. To clean, to preserve, to charge, and to add fuel lubricants, cooling agents and air. If it is
desired that elements such as painting and lubricating be defined separately, they maybe so listed.
D - ADJUST. To rectify to the extent necessary to bring into proper operating range.
E - ALIGN. To adjust specified variable elements of an item to bring to optimum performance.
F - CALIBRATE. To determine the corrections to be made in the readings of instruments or test equipment
used in precise measurement. Consists of the comparison of two instruments, one of which is a certified standard of
known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared with the certified
G - INSTALL. To set up for use in an operational environment such as an emplacement, site or vehicle.
H - REPLACE. To replace unserviceable items with serviceable like items.
I - REPAIR. Those maintenance operations necessary to restore an item to serviceable condition through
correction of material damage or specific failure. Repair may be accomplished at each category of maintenance.
J - OVERHAUL. That maintenance effort (service/action) necessary to restore an item to a c mpletely
serviceable/ operational condition as prescribed by maintenance standards (i.e., DMWR) 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.