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 by Organizational Maintenance
4 4 . P r e v e n t i v e Maintenance
Mechanics
The
indicated frequencv of the prescribed pre-
a. Intervals.
ventive-maintenance services is considered a minimum require-
ment for normal operation of semitrailer.
Under unusual oper-
ating conditions, such as extreme temperatures, dust or sand,
or extremely wet terrain, it may be necessary to perform cer-
tain maintenance services more frequently.
Note. A
semitrailer
used
habitually
with
the
same
towing
vehicle
will
be
given
preventive-maintenance
services
with
the
towing
vehicle.
A
semitrailer
not
used
habitually
with
the
same
towing
vehicle
will
be
given
preventive
maintenance
services
as
a
separate
vehicle.
b. Driver or operator
Participation. The
drivers
or
oper-
ators
should
accompany
their
vehicles
and
assist
the
organi-
zational mechanics whiIe
periodic organizational
preventive-
maintenance services are
performed.
Ordinarily,
the driver
should present the semitrailer for a scheduled preventive-main-
tenance service in a reasonably clean condition.
c. Special services.
These are indicated by numbers in the
columns of DA Form 461 (e below) which show the interval
at which the services are to be performed, and show that the
parts or assemblies are to receive certain mandatory services.
For example, an item number in one or both columns opposite
a tighten procedure
means
that
the
actual
tightening
of
the
TAGO 1321B
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