consumption.
On Type II
Federal Motor Carrier Safety
tractors, the system shall be
Regulation 393.77(b) (7).
equipped with an air pressure
SK
METRIC ODOMETER
dump valve. Controls shall be
When code SK is specified, the
located in the cab, accessible to
odometer shall show cumulative
the seated driver.
Hydraulic
distance in kilometers.
double-acting shock absorber(s)
shall be provided near each of
SKS
SPARK ARRESTER, EXHAUST
the air springs.
The air
SYSTEM
suspension system shall include
When code SKS is specified, a
mechanisms to prevent damage
spark arrester shall be provided.
from excessive extension when
The spark arrester shall provide
lifting and towing the vehicle.
a minimum of 80 percent
The
suspension
shall
be
arresting efficiency when rated
provided with a mechanism at
in accordance with SAE J350.
each wheel to assure lifting of
Note: not available on vehicles
the wheel and axle when jacking
with diesel engines.
the vehicle from the applicable
jacking location. Note: option
SLP
LOW PROFILE TIRES
not available on Type IV dumps.
When code SLP is specified, low
profile tires shall be provided.
SEHB
OIL PAN HEATER
An
oil pan heater of the
SLP1
SHORT SLEEPER
permanent external surface
COMPARTMENT
mount or immersion type
When code SLP1 is specified, a
that meets the following
sleeper
cab
meeting
the
requirements
shall
be
requirements of 3.4.12 and
installed.
3.4.12.1 shall be provided with
the following additional space,
(1) Immersion type - not more
equipment and features: The
than 11 W/L (10 watts per
sleeper compartment shall be
quart) or less than 5W/L (5
not less than 914 mm (36
watts per quart) heating
inches) in depth and fitted with a
capacity.
foam or inner spring mattress
(2) Surface type - not more
not less than 863 mm (34
than 2.8 watts per square
inches) in depth, and a sleeper
centimeter (W/cm2) (18
occupant restraint system. A
watts per square inch) or
luggage
compartment
with
less than 1.4 watt/sq. cm (9
locking access doors on each
watts per sq. in.) heating
side of the cab shall be
capacity.
provided. Curtains and a dome
light shall be provided. The
The oil pan heater shall conform
sleeper compartment shall have
to all requirements of Federal
heating and air conditioning.
Motor Carrier Safety Regulation
Auxiliary
air
temperature
393.77(b) (7).
controls or louvers shall be
SEHE
AN IN-LINE FUEL WARMER
provided
in
the
sleeper
An in-line fuel warmer of the
compartment. The controls or
electrically heated type shall be
louvers shall provide for remote
provided and conform to all
regulation of both heating and
requirements of SAE J 1422 and
Page 61 of 79
to verify that this 7 4Y
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