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TM 10-4930-369-13&P
chemical luids, or gases. This includes scheduled exercising and purging of recoil mechanisms. The
following are examples of service functions:
4. a. Unpack. To remove from packing box for service or when required for the performance of maintenance
operations.
b. Repack. To return Item to packing box after service and other maintenance operations.
c. Clean. To rid the Item of contamination.
d. Touch up. To spot paint scratched or blistered surfaces.
e. Mark. To restore obliterated identiication.
5. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the
operating characteristics to speciied parameters.
6. Align. To adjust speciied variable elements of an Item to bring about optimum or desired performance.
7. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments of test,
measuring, and diagnostic equipment used in precision measurement. Consists of comparisons of two
instruments, one of which is a certiied standard of known accuracy, to detect and adjust any discrepancy in
the accuracy of the instrument being compared.
8. 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 ixing into position a spare, repair part, or module
(component or assembly) in a manner to allow the proper functioning of an equipment or system.
9. Paint (ammunition only). To prepare and spray color coats of paint so that the ammunition can be identiied
and protected. The color indicating primary use is applied, preferably, to the entire exterior surface as
the background color of the Item. Other markings are to be repainted as original so as to retain proper
ammunition identiication.
10. Replace. To remove an unserviceable Item and install a serviceable counterpart in its place. "Replace"
is authorized by the MAC and assigned maintenance level is shown as the third position code of the
Source, Maintenance and Recoverability (SMR) code.
11. Repair. The application of maintenance services, including fault location/troubleshooting,
removal/installation, disassembly/assembly procedures and maintenance actions to identify troubles and
restore serviceability to an Item by correcting speciic damage, fault, malfunction, or failure in a part,
subassembly, module (component or assembly), end Item, or system.
12. 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. Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul
does not normally return an Item to like new condition.
13. 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 (e.g., hours/miles) considered in classifying Army equipment/components.
NOTE
The following deinitions are applicable to the "repair" maintenance function:
Services. Inspect, test, service, adjust, align, calibrate, and/or replace.
Fault location/troubleshooting. 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).
Disassembly/assembly. The step-by-step breakdown (taking apart) of a spare/functional group
coded Item to the level of its least component, that is assigned an SMR code for the level of
maintenance under consideration (i.e., identiied as maintenance signiicant).
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