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|  MIL-T-62145E
* 3.4.9 Axles. Axle ratings shall be at least equal to the load imposed on each axle, measured
at the ground, with the vehicle loaded to required GVW and during all operating conditions.
When specified (see 6.2), 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 pressure buildup and for replenishing the oil supply shall
be provided.
3.4.9.1 Rear bogie (6x4 model). The rear bogie of model 6x4 shall be of the four-wheel
type, complete with axles, springs, torque rods, and all other necessary parts. The bogie shall be
provided with a means permitting differential action between the two axles, and a manually
controlled lockout assuring equal power to each rear axle. Lockout control shall be located in
the truck cab. Axle gear ratios shall provide the performance specified in 3.3.1 through 3.3.1.3.
3.4.9.2 Two-speed axle. When specified (see 6.2), a two-speed axle shall be furnished,
equipped with electric, vacuum, or air shift and provided with ratios which will permit proper
gear splitting. Gear ratios shall provide performance specified in 3.3.1 through 3.3.1.3.
3.4.9.3 Traction control. When specified (see 6.2), the vehicle shall be furnished with a
traction control on the rear axle for model 4x2 and on either rear axle on model 6x4. The
traction control shall actuate automatically to insure that power is transmitted to the wheels
having traction when the opposite wheel loses traction. Maximum traction capabilities shall be
maintained at all times under each drive wheel for the life of the vehicle.
* 3.4.10 Wheels, rims, tires and tubes. Unless wide base tires are specified, the vehicle shall
be equipped with single front and dual rear wheels. Rims and tire ratings shall conform to Tire
and Rim Association or European Tyre and Rim Technical Organisation recommendations for
the type and size of tires furnished. Except when tube type tires are specified in procurement
documents, multi-piece rims shall not be furnished. Rims and disc wheel sizes shall be the same
for all wheels on each vehicle. Tire size and load range (ply rating) shall be the same for all
wheels on each vehicle. When specified (see 6.2), wide base type tires and wheels for the front
and rear axles shall be provided in lieu of conventional front and dual rear wheels and tires.
Wide base wheels shall be interchangeable without the use of an adapter. When specified
(see 6.2), disc type wheels shall be furnished.
* 3.4.10.1 Tires. Tires shall be of the tubeless type with highway tread. Steel belted radial
type or when specified (see 6.2), bias ply tires shall be furnished. Tires shall be of rated capacity
at least equal to the load imposed on each tire, measured at each wheel, at the ground, with the
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