TM 11-6130-381-14
APPENDIX D
MAINTENANCE
ALLOCATION
Section I. INTRODUCTION
D-1. General
services (inspect, t a t , service, adjust, align,
calibrate, replace) or other maintenance actions
This appendix provides a summary of the maint-
(welding, grinding, riveting, straightening, facing,
enance operations for PP-4127B/U. It authorizes
remachining, or r e s u r f a c i n g ) to restore ser-
categories of maintenance for specific maintenance
viceability to an item by correcting specific
functions on reparable items and components and
damage, fault, malfunction, or failure in a part,
the tools and equipment required to perform each
subassembly, module (component or assembly),
function. This appendix may be used as an aid in
end item, or system.
planning maintenance operations.
j. Overhaul. That maintenance effort (ser-
D-2. Maintenance Function
vice/action) necessary to restore an item to a
Maintenance functions will be limited to and
completely serviceable/operational condition as
defined as follows:
prescribed by maintenance standards (i.e., DM -
a. Inspect. To determine the serviceability of an
W R ) in appropriate technical publications.
item by comparing its physical, mechanical, and/
Overhaul is normally the highest degree of main-
or electrical characteristics with established
tenance performed by the Army. Overhaul does
standards through examination.
not normally return an item to like new condition.
b. Test. To verify serviceability and to detect
k. Rebuild. Consits of those services/actions
incipient failure by measuring the mechanical or
necessary for the restoration of unserviceable
electrical characteristics of an item and comparing
equipment to a like new condition in accordance
those characteristics with prescribed standards.
with original manufacturing standards. Rebuild is
c. Service. Operations required periodically to
the highest degree of materiel maintenance applied
keep an item in proper operating condition, i.e., to
to Army equipment. The rebuild operation includes
clean (decontaminate), to preserve, to drain; to
the act of returning to zero those age
paint, or to replenish fuel, lubricants, hydraulic
measurement (hours, miles, etc.) considered in
fluids, or compressed air supplies.
classifying Army equipments/components.
d. Adjust. To maintain, within prescribed
D-3. Column Entries
limits, by bringing into proper or exact position, or
a. Column 1, Group Number. Column 1 lists
by setting the operating characteristics to the
group numbers, the purpose of which is to identify
specified parameters.
subassemblies, and
assemblies,
components,
e. Align. To adjust specified variable elements
modules with the next higher assembly.
of an item to bring about optimum or desired
b. Column 2, Component/Assembly. Column 2
performance.
contains the noun names of components, assem-
f. Calibrate. To determine and cause corrections
blies, subassemblies, and modules for which
to be made or to be adjusted on instruments or
maintenance is authorized.
test measuring and diagnostic equipments used in
c. Column 3, Maintenance Functions. Column 3
precision measurement. Consists of comparisons of
lists the functions to be performed on the item
two instruments, one of which is a certified
listed in column 2. When items are listed without
standard of known accuracy, to detect and adjust
maintenance functions, it is solely for purpose of
any discrepancy in the accuracy of the instrument
having the group numbers in the MAC and RP-
being compared.
STL coincide.
g. Install. The act of emplacing, seating, or
d. Column 4, Maintenance Category. Column 4
fixing into position an item, part, module (com-
specifies, by the listing of a "worktime" figure in
ponent or assembly in a manner to allow the
the appropriate subcolumn(s), the lowest level of
proper functioning of the equipment or system.
maintenance authorized to perform the function
h. Rep/ace. The act of substituting a serviceable
listed in column 3. This figure represents the
like type part, subassembly, or module (component
active time required to perform that maintenance
or assembly) for an unserviceable counterpart.
function at the indicated category of maintenance.
i. Repair. The application of maintenance
D-1
