TM-9-2330-238-14

CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1992

  TM-9-2330-238-14 - Page 84 of 462

TM
9-2330-238-14
Section
IV.
OPERATION
UNDER
UNUSUAL
CONDITIONS
Page
Paragraph
Title
Number
Fording
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-34
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-32
Operation
in Extreme Cold
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-32
Operation
in Extreme
Heat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-32
Operation
in Mud and Snow.
...
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-33
Operation
in Saltwater
Areas.
...
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-33
Operation
in Sandy or
Dusty
Areas
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-33
Operation
Under
Rainy
or Humid
Conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-33
2-19.
GENERAL.
a.
This
section
contains
instructions
for
safely
operating
the
semitrailers
under unusual
conditions.
In
addition tonormal
preventive
maintenance
service, special
care must be taken
tokeep
the semitrailers
operational
in
extreme
temperatures
and humidity.
b.
For information
on driver
selection,
training,
and supervision,
refer to FM 55-30.
c.
For information
on special
driving
instructions
for operating
wheeled
vehicles
under unusual
conditions,
refer to
FM 21-305.
2-20.
OPERATION
IN EXTREME
COLD.
a.
Special
care must
be taken
when operating
semitrailers
in extreme
cold
weather.
Refer to
FM 9-207 for
information
on operation
in cold
weather.
b.
Refer to Chapter
3, Section
I for proper
lubrication
during
extreme
cold
weather.
c.
Generally,
extreme
cold
causes
lubricants
to
thicken
or freeze
and
various
semitrailer
construction
materials
to become
hard and brittle,
and easily
damaged
or broken.
The operator
must be alert to effects
of extreme
cold
on semitrailers.
d.
Care must
be
taken
when
handling
cables.
Extreme
cold
weather
can
cause
insulation
material
on
electrical
wire to crack,
causing
short circuits.
Construction
material
may become
hard, brittle,
and easily
broken
or
damaged.
e.
When parking
for any period
of time in temperatures
below
0°F (-18°C),
park in a sheltered
area out of the
wind
and clean
off any buildup
of ice or snow.
Place
a footing
of planks
or brush
under tires to prevent
them from
freezing
to the ground.
Ensure that tires are properly
inflated
(para
1-10). Under inflated tires will freeze,
resulting
in flat
spots.
f.
Use
caution
when
placing
semitrailer
in motion
after
a shutdown.
Thickened
lubricants
may
cause
component
failure.
Free frozen
brakeshoes,
or tires frozen
to ground,
with care.
2-21.
OPERATION
IN EXTREME
HEAT.
a.
Refer to Chapter
3, Section
I for proper
lubrication
during
high heat conditions.
b.
Do not park
semitrailer
in sunlight
for long periods
of time.
Heat and sunlight
shorten
tire life.
2-32


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