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MIL-T-2452J
not less than four forward gear ratios without movement of the selector. The transmission shall
be provided with SAE J704 power takeoff opening(s). A hydraulic retarder shall not be used. If
integral with the transmission, the hydraulic retarder shall be disconnected.
3.4.5.1 Power takeoff. The power takeoff shall be of a rated capacity to operate powered
equipment. Controls to operate the power takeoff shall be located in the truck cab accessible to
the seated driver. A caution plate or decal reading "DO NOT DRIVE VEHICLE WITH
POWER TAKEOFF ENGAGED" shall be provided and installed so as to be readily visible to
the seated driver. An air actuated power takeoff shall be furnished for all vehicles except
vehicles equipped with power hydraulic brakes.
3.4.6 Driveline components. Driveline components shall be adequate to transmit the
maximum delivered torque on the engine as developed through the maximum gear train
reduction.
3.4.7 Frame. The chassis frame shall be the manufacturer's standard reinforced frame,
or a heavy duty frame, for the type and class vehicle furnished. The reinforced frame shall have
frame reinforcement extended at least from the rear of the front suspension, rear hanger bracket
to the front of the rear spring for 4x2 vehicles and to the bogie trunnion mounting bracket for 6x4
vehicles. Reinforcement in the form of fishplating is not acceptable. Both the reinforced frame
and the heavy duty frame shall have sufficient resisting bending moment to provide the structural
strength required to at least equal the loads imposed with the vehicle loaded to provide specified
GVW.
3.4.8 Suspension. The vehicle shall be equipped with a suspension system having a
rated capacity at least equal to the load imposed on each member, measured at the ground, with
the vehicle loaded to the specified GVW. When the suspension capacity is rated at the spring
pads, unsprung weight shall be deducted. Vehicles with a front axle rating of 12,000 pounds or
less shall be equipped with hydraulic double-acting shock absorbers at the front wheels.
*
3.4.9 Axles. Axle ratings shall be at least equal to the load imposed on each axle,
measured at the ground, when the vehicle is loaded to its specified GVW. Axle gear ratios shall
provide the performance specified in 3.3.1. When specified (see 6.2), the wheel bearings and
axle spindles shall be oil lubricated. The hubcaps 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.
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