Adjust. To rectify to the extent necessary to bring into proper operating range,
Aline. To adjust specified variable elements of an item to bring to optimum performance.
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 standard.
G Install. To set up for use in an operational environment such as an emplacement, site, or
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 a specific failure. Repair may be accomplished at each
category of maintenance.
J - Overhaul. Normally, the highest degree of maintenance performed by the Army in order to
minimize time work in process is consistent with quality and economy of operation. It consists of that
maintenance necessary to restore an item to completely serviceable condition as prescribed by
maintenance standard in technical publications for each item of equipment. Overhaul normally does
not return an item to like new, zero mileage, or zero hour condition.
K - Rebuild. The highest degree of material maintenance. It consists of restoring equipment as
nearly as possible to new conditions in accordance with original manufacturing standards. Rebuild is
performed only when required by operational considerations or other paramount factors and then only
at the depot maintenance category. Rebuild reduces to zero the hours or miles the equipment, or
component thereof, has been in use.
d. Symbols. The uppercase letter placed in the appropriate column indicates the lowest level at
which that particular maintenance function is to be performed.
e. Tools and Equipment. Column 4. This column is provided for referencing by code, the special
tools and test equipment, (Section Ill) required to perform the maintenance functions (Section II).
f. Remarks. Column 5. This column is provided for referencing by code, the remarks (Section
IV) pertinent to the maintenance functions.
C-3. Explanation of Columns in Section Ill. Section Ill, Tools, Test, and Support Equipment
Requirements is not applicable.
C-4. Explanation of Columns in Section IV. Section IV, Remarks, is not applicable.