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|  MIL-T-46765(AT)
3.4.6 Driveline components. Driveline components shall be adequate to transmit the
maximum delivered torque of the engine, as developed through the maximum gear train
reduction.
3.4.7 Frame. The vehicle shall have a heavy duty main frame or frame reinforcements. The
heavy duty frame shall have frame rails of greater section modulus than the manufacturer's
standard for the size vehicle furnished and shall provide structural strength at least equivalent to
the reinforced frame specified herein. Reinforcements shall extend at least from the rear of the
front suspension, rear hanger bracket to the front of the rear spring, front hanger bracket for size
1200 vehicles. Reinforcements for size 2000 vehicles shall extend at least from the rear of the
front suspension, rear hanger bracket to the bogie trunnion mounting bracket. Reinforcements
shall provide sufficient structural strength in the chassis frame through increased resisting
bending moment to at least equal the loads imposed, with the dump body loaded to provide
specified GVW.
3.4.8 Suspension. The vehicle shall be equipped with a suspension system, with components
having a rated capacity at least equal to the load imposed on each member, measured at the
ground, with the vehicle loaded to specified GVW. When suspension is rated at the spring pads,
unsprung weight shall be deducted. The vehicle shall be equipped with hydraulic, double- acting
shock absorbers at the front wheels.
* 3.4.9 Ax1es. Axle ratings shall be at least equal to the load imposed on each axle, measured
at the ground, with the vehicle loaded to specified GVW. The wheel bearings and axle spindles
shall be oil lubricated. The hubcaps, except for driving axles, shall have a window for visual
determination of oil level. Provisions for venting or withstanding internal pressure buildup and
for replenishing the oil supply shall be provided.
3.4.9.1 Two-speed axle. When specified (see 6.2), or when furnished in accordance with
3.4.5, a two-speed axle shall be furnished, equipped with electric, vacuum, or air shift and
provided with ratios which will permit proper gear splitting. The gear ratio shall provide the
performance specified in 3.3.1.
3.4.9.2 Rear bogie. The rear bogie on size 2000 vehicles shall be of the four-wheel type,
complete with axles, springs, torque rods, and all other necessary parts. The bogie shall be
provided with means permitting differential action between the two axles, and a manually or
automatically controlled lockout assuring equal power to each rear axle. The manual lockout
control used shall be located in the truck cab. Axle gear ratios shall provide performance
specified in 3.3.1.
3.4.9.3 Traction control. When specified (see 6.2), traction control shall be furnished on one
rear axle. The traction control shall actuate automatically to insure that power is transmitted to
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