3.4.3.3
FUEL AND WATER SEPARATOR.
The clutch shall have a torque capacity
The manufacturer's standard or optional
exceeding the maximum delivered engine
fuel filter shall be provided. A fuel and
torque. The clutch lining shall be
water separator shall also be furnished for
asbestos free. The clutch shall be
diesel engines.
The separator shall
equipped with spring dampening and a
include water coalescent and a drain
greaseable bearing
valve. A combination filter/separator unit
3.4.5.3
TRANSFER CASE.
may be provided. See option FFS for
A two-speed transfer case shall be
heated fuel and water separator.
provided on 6x6 vehicles. Unless the
3.4.4
EXHAUST SYSTEM.
transfer case is equipped with devices
The exhaust system shall conform to
which compensate for differential torque
Federal Motor Carrier Safety Regulation
and speeds between front and rear axles,
393.83.
the transfer case shall provide for driver
selection of either four-wheel or six-wheel
3.4.5
TRANSMISSION.
drive.
When furnished, inter-axle
Unless otherwise specified, the vehicle
compensating devices shall provide for
shall be equipped with a manual
positive transfer of power to all driving
transmission. When specified (see 6.2),
axles.
The speedometer shall read
the vehicle shall be equipped with an
accurate vehicle speed with the transfer
automatic transmission. The input torque
case speed selector in high and in low
capacity of supplied transmission shall be
range. An overlay on the speedometer
at least equal to the maximum torque
face may be utilized to indicate accurate
delivered by the engine.
speed in low range.
3.4.5.1
AUTOMATIC TRANSMISSION.
3.4.6
DRIVELINE COMPONENTS.
Automatic transmissions shall include a
Driveline components shall be rated to
hydraulic torque converter and not less
transmit the maximum delivered torque of
than five forward gear ratios. Normal
the engine, as developed through the
driving range selector position shall
maximum
gear
train
reduction.
provide not less than five gear ratios
Components shall be rated no less than
without movement of the selector. The
the GCWR in 3.2.8. Drivelines shall be
transmission shall be provided with power
balanced and free of vibration.
takeoff provision. The net torque capacity
and the net power rating of the
3.4.7
FRAME.
transmission shall exceed the output
The chassis frame shall be the
ratings of the engine.
manufacturer's standard for the type and
class vehicle furnished. Reinforcements
shall extend at least from the rear of the
3.4.5.2 CLUTCH.
front suspension, rear hanger bracket to
the front of the rear spring, front hanger
bracket.
Reinforcements for Type III
stake dumps and Type IV dumps shall
provide sufficient structural strength in the
chassis frame, through increased resisting
bending moment (RBM), to at least equal
the loads imposed, with the dump truck
loaded to provide specified GVW.
Frame rails shall not project beyond the
Federal Standard 807M
Page 17 of 65
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