ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
MAINTENANCE ALLOCATION CHART
S e c t i o n I . I N T R O D U C T I ON
This section provides a general explanation of all maintenance and repair functions authorized at various
The Maintenance Allocation Chart (MAC) in section H designates overall authority and responsibility for the
performance of maintenance functions on the T.Q. Generator Sets and its components. The application of
the maintenance functions to the generator sets or components will be consistent with the capacities and
capabilities of the designated maintenance categories.
Section Ill Iists the tools and test equipment (both special tools and common tool sets) required for each main-
tenance function as referenced from section Il.
Section IV contains supplemental instructions and explanatory notes for particular maintenance functions.
MAINTENANCE FUNCTIONS. Maintenance functions will be limited to and defined as follows:
Inspect. To determine the service ability of an item by comparing its physical, mechanical, and/or electrical
characteristics with established standards through examination (e.g., by sight, sound, or feel).
Test. To verify serviceability by measuring the mechanical, pneumatic, or electrical characteristics of an item
and comparing those characteristics with prescribed standards.
Service. Operations required periodically to keep an item in proper operating condition, i.e., to dean (include
decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids,
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting
the operating characteristics to specified parameters.
Aline. To adjust specified variable elements of an item to bring about optimum or desired performance.
Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or Test, Measur-
ing, and Diagnostic Equipment (TMDE) used in precision measurement. Consists of comparisons 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.
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 3rd position code of the SMR code.