TM 11-6625-2735-14-1
APPENDIX D
MAINTENANCE ALLOCATION
Section I. lNTRODUCTION
D-1. General
This appendix provides a summary of the maintenance
operations for the 0S-261B(V)1/U and OS-261C(V)1/U.
It authorizes categories of maintenance for specific mainte-
nance functions on repairable items and components and
the tools and equipment required to perform each function.
This appendix may be used as an aid in planning mainte-
nance operations.
D-2 Maintenance Function
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 exami-
nation.
b. Test.
To verify serviceability and to detect incipient
failure by measuring the mechanical or electrical charac-
teristics of an item and comparing those characteristics
with prescribed standards.
c. Service.
Operations required periodically to keep an
item in proper operating conditions, i.e., to clean (decon-
taminate), to preserve, to drain, to paint, or to replenish
fuel, lubricants, hydraulic fluids, or compressed air supplies.
d. Adjust. To maintain, within prescribed limits, by
bringing into proper or exact position, or by setting the
operating characteristics to the specified parameters.
e. Align. To adjust specified variable elements of an
item to bring about optimum or desired performance.
f. Calibrate. To determine and cause corrections to
be made or
to
be adjusted on instruments or test measuring
and diagnostic equipments 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.
g. Install. The act of emplacing, seating, or fixing
into position an item, part, module (component or assem-
bly) in a manner to allow the proper functioning of the
equipment or system.
h. Replace. The act of substituting a serviceable like
type part, subassembly, or module (component or assembly)
for an unserviceable counterpart.
i. Repair. The application of maintenance services
(inspect, test, service, adjust, align, calibrate, replace)
or other maintenance actions (welding, grinding, riveting,
straightening, facing, remachining, or resurfacing to restore
serviceability to an item by correcting specific damage,
fault, malfunction, or failure in a part, subassembly, module
(component or assembly), end item, or system.
j. Overhaul. That maintenance effort (service/action)
necessary to restore an item to a completely serviceable/
operational condition as prescribed by maintenance stand-
ards (i.e., DMWR) 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.
k. 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 main-
tenance applied to Army equipment. The rebuild operation
includes the act of returning to zero those age measurements
(hours, miles, etc.) considered in classifying Army equip-
ments/components.
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