TM 9-3990-260-14&P
MAINTENANCE ALLOCATION CHART (MAC)
Section I. INTRODUCTION
B-1. GENERAL.
a. This section provides a general explanation of all maintenance and repair functions authorized at
various maintenance levels.
b. The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsi-
bility for the performance of maintenance functions on the Container Roll-In/Out Platform (CROP) M3 and M3Al.
c.
Section III lists the tools and test equipment required for each maintenance function as referenced
from Section II.
d.
Section IV lists remarks (identified by an alphabetic code in column 6 of MAC) to provide a ready
reference to the definition of the remarks.
B-2. MAINTENANCE FUNCTIONS.
Maintenance functions will be limited to and defined as follows:
a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or
electrical characteristics with established standards through examination (e.g., by sight, sound, or feel).
b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical
characteristics of an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating condition, i.e., to
clean (includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chem-
ical fluids, or gases.
d.
Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact posi-
tion, or by setting the operating characteristics to specified parameters.
e.
Align. To adjust specified variable elements of an item to bring about optimum or desired perfor-
mance.
f.
Calibrate. To determine and cause corrections to be made or to be adjusted on .instruments or test,
measuring, and diagnostic equipment used in precision measurement. Consists of 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.
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 an 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 3rd position code of the SMR code.
