TM 9-1550-416-14&P
APPENDIX B
MAINTENANCE ALLOCATION CHART
Section I. INTRODUCTION
B-1. GENERAL.
The maintenance allocation chart indicates specific maintenance operations performed at proper maintenance levels. Deviation
from maintenance operations allocated in the chart is authorized only upon the approval of the Commanding Office.
B-2. MAINTENANCE FUNCTIONS.
Maintenance functions will be limited to and defined as follows:
a. ADJUST - Maintain within prescribed limits by bringing into proper or exact position, or by setting the operating
characteristics to the specified parameters.
b.
ALIGN - To adjust specified variable elements of an item to bring about optimum or desired performance.
c. CALIBRATE - To determine and cause corrections to be made or to be adjusted on instruments or test measuring and
diagnosic equipment 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.
d. INSPECT - To determine the serviceability of an item by comparing its physical, mechanical, and or electrical
characteristic with established standards through examination.
e. INSTALL - The act of emplacing, seating, or fixing into position an item, part, module (compartment or assembly) in
manner to allow the proper functioning of the equipment system.
f . OVERHAUL - That maintenance effort (service/action) necessary to restore an item to a completely serviceable
operational condition as prescribed by maintenance standards (e.g., DMWR) in pertinent technical publications. Overhaul does
not normally return an item to like new condition. Overhaul is normally the highest degree of maintenance performed by the Army.
g. 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 (hours, miles, ets.) considered
in classifying Army equipment components.
h. REPAIR - The application of maintenance services (inspect, test, service, adjust, align, calibrate, replace) or other
maintenance actions (welding, grinding, riveting, straightening facing, machining, or resurfacing) to assembly, module
component/assembly, end item or system.
i. REPLACE - The act of substituting a serviceable like-type part, subassembly, module (component or assembly) in a
manner to allow the proper functioning of an equipment system.
j. SERVICE - Operations required periodically to keep an item in proper operating condition, i.e., to clean, preserve, drain,
paint, or to replenish fuel/lubricants/hydraulic fluids or compressed air supplies.
k. TEST - To verify serviceability and to detect incipient failure by measuring the mechanical or electrical characteristics
of an item and comparing those characteristics with prescribed standards.
1. SYMBOLS - The uppercase letter placed in the appropriate column indicates the lowest level at which that particular
maintenance function is to be performed.
B-3. EXPLANATION OF FORMAT.
a. Column (1) Group Number. Column 1 lists group numbers, the purpose of which is to match components, assemblies,
subassemblies, and modules with the next higher assembly.
B-1