S e c t i o n 1.
electrical characteristics of an item and comparing
those characteristics with prescribed standards.
a. This section provides a general explanation of
(3) Service. Operations required periodically to
all maintenance and repair functions authorized at
keep an item in proper operating condition, i.e., to
various maintenance levels.
clean, t o preserve, to drain, to paint, or to
b. Section II designates overall responsibility
for the performance of maintenance functions on
compressed air supplies.
the identified end item or component and the work
(4) Adjust. To maintain within prescribed
measurement time required to perform the func-
limits, by bringing into proper or exact position, or
tions by the designated maintenance level. The
by setting the operating characteristics to specified
implementation of the maintenance functions upon
the end item or component will be consistent with
(5) Align. To adjust specified variable
the assigned maintenance functions.
elements of an item to bring about optimum or
c. Section III lists the tools and test equipment
r e q u i r e d for each maintenance function as
(6) Calibrate. T o d e t e r m i n e a n d c a u s e
referenced from Section II.
corrections to be made or to be adjusted on in-
d. Section IV contains supplemental instructions
s t r u m e n t s or test measuring and diagnostic
or explanatory notes for a particular maintenance
e q u i p m e n t u s e d i n precision measurement.
Consists of comparison of two instruments, one of
D-2. Explanation of Columns in Section 11
which is a certified standard of know accuracy, to
a. Group Number, Column (1). A number is
detect and adjust any discrepancy in the accuracy
assigned to each group in a top-down breakdown
of the instrument being compared.
sequence. The applicable groups are listed in the
(7) Install. The act of emplacing, seating, or
MAC in disassembly sequence beginning with the
fixing into position an item, part, or module
first group removed.
(component or assembly in a manner to allow the
b. Assembly Group, Column (2). This column
proper functioning of an equipment or system.
contains a brief description of the components of
(8) Replace. The act of substituting a ser-
each numerical group,
viceable like type part, subassembly, or module
c. Maintenance Functions, Column (3). This
(component or assembly) for an unserviceable
column lists the functions to be performed on the
items listed in Column 2. The lowest maintenance
(9) Repair. The application of maintenance
level authorized to perform these functions is
services (inspect, test, service, adjust, align,
indicated by a symbol in the appropriate column.
calibrate, or replace) or other maintenance actions
The symbol designators for the various maintenance
(welding, grinding, riveting, straightening, facing
levels are as follows:
remachining or resurfacing) t o restore ser-
COperator or crew.
viceability to an item by correcting specific
damage, fault, malfunction, or failure in a part,
F Direct Support maintenance.
subassembly, module (component or assembly),
HGeneral Support maintenance
end item, or system.
(10) Overhaul. That maintenance effort
The maintenance functions are defined as follows:
(service/action) necessary to restore an item to a
(1) Inspect. To determine serviceability of an
completely serviceable/operational condition as
item by comparing its physical, mechanical, and
prescribed by maintenance standards (i.e., DM-
electrical characteristics with established standards
W R ) in appropriate technical publications.
O v e r h a u l is normally the highest degree of
(2) Test. To verify serviceability and detect
maintenance performed by the Army. Overhaul
incipient failure by measuring the mechanical or