3.4.7
FRAME.
lines are furnished they shall be in
The chassis frame shall be the
accordance with TMC RP 321.
manufacturer's standard for the type and
3.4.3.3
FUEL AND WATER SEPARATOR.
class vehicle furnished. Reinforcements
The manufacturer's standard or optional
shall extend at least from the rear of the
fuel filter shall be provided. A fuel and
front suspension, rear hanger bracket to
water separator shall also be furnished for
the front of the rear spring, front hanger
diesel engines.
The separator shall
bracket.
Reinforcements for Type III
include water coalescent and a drain
stake dumps and Type IV dumps shall
valve. A combination filter/separator unit
provide sufficient structural strength in the
may be provided. See option FFS for
chassis frame, through increased resisting
heated fuel and water separator.
bending moment (RBM), to at least equal
the loads imposed, with the dump truck
3.4.4
EXHAUST SYSTEM.
loaded to provide specified GVW. Frame
The exhaust system shall conform to
reinforcement for Type III stake with crane
Federal Motor Carrier Safety Regulation
shall be in accordance with the body
393.83.
manufacturer's recommendations for the
size of the crane furnished. Frame rails
3.4.5
TRANSMISSION.
shall not project beyond the rear end of
Unless otherwise specified, the vehicle
the body. Unless otherwise specified, on
shall be equipped with an Allison or equal
Type II tractors, the chassis frame rails
automatic transmission model 2500, 3500
shall be cut off immediately to the rear of
or 4500 as applicable for engine supplied.
the rear spring rear hanger brackets or
The automatic transmission shall include
the frame crossmember closest to the
a hydraulic torque converter and not less
rear of these brackets. When a RBM is
than five forward gear ratios. Normal
specified, any frame combination of yield
driving range selector position shall
strength and section modulus that
provide not less than five gear ratios
provides the required RBM is acceptable.
without movement of the selector. The
net torque capacity and the net power
3.4.8
SUSPENSION.
rating of the transmission shall exceed the
Except as specified in option codes MPR
output ratings of the engine.
The
and MPS, the vehicle shall be equipped
transmission shall be provided with power
with
a
suspension
system
with
takeoff provisions to include gear and
components having a rated capacity at
opening.
least equal to the load imposed on each
member, measured at the ground, with
3.4.5.1
TRANSFER CASE.
the vehicle loaded to specified GVW.
A two-speed transfer case shall be
When suspension is rated at the spring
provided on 4x4 vehicles.
pads, un-sprung weight shall be
deducted. The vehicle shall be equipped
3.4.6
DRIVELINE COMPONENTS.
with hydraulic, double-acting shock
Driveline components shall be rated to
absorbers at the front wheels.
transmit the maximum delivered torque of
the engine, as developed through the
3.4.9
AXLES.
maximum gear train reduction. The drive
Except as specified in option codes MPR
shaft for front mounted winches shall have
and MPS, axle ratings shall be at least
an angle not greater than 16 degrees from
equal to the load imposed on each axle,
the longitudinal plane. Components shall
measured at the ground, with the vehicle
be rated no less than the GCWR in 3.2.9.
loaded to specified GVW. The wheel
Drivelines shall be balanced and free of
bearings and axle spindles shall be oil
vibration.
lubricated except on front drive axles.
Page 17 of 79
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