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|  MIL-T-62735
3.4.2.17.2 Heavy duty skid plate. Truck tractors for use with bottom dump semitrailers
shall have a heavy duty skid plate protecting the radiator, crankcase, and transmission from
ground contact. The skid plate shall be demountable for servicing the engine and transmission.
The skid plate shall have openings to enable draining the transmission and servicing the
underside of the engine.
3.4.2.18 Increased swing radius. When needed for additional equipment to be mounted
behind the cab and when specified (see 6.2) the SR as detailed in 3.4.2.4.1 shall be increased
from 1620 mm (64 inches) by the amount specified (see 6.2). Maximum wheelbase, CA and CT
dimensions may be increased (on line) by the chassis manufacturer by a similar amount. The
lengths of the semitrailer lighting cable(s) and the air hoses shall be the free lengths to the rear of
the equipment to be mounted.
3.4.2.18.1 Weight distribution with increased swing radius. When specified (see 6.2),
the weight distribution for the purpose of establishing suspension, axle and tire capacities
(see 3.1.7) shall be determined with the additional load specified (see 6.2) distributed evenly in
the added space behind the cab.
3.4.2.19 MIL-VAN tactical semitrailer compatibility. When specified for vehicles up to
class 50 (see 6.2), the truck tractor shall conform to the following in lieu of the LWC specified in
3.4.2.4.2. Further, the LWC from the centerline of the fifth wheel to the rear tires shall be not
more than 1780 mm (70 inches). The longitudinal distance from the center line of the fifth wheel
to a vertical plane at the rear of the chassis frame rails shall be not more than 1270 mm
(50 inches). The fifth wheel shall be located forward of the centerline of the bogie.
3.4.2.19.1 Coupling to MIL-VAN. The truck tractor shall be capable of coupling to
MIL-VAN tactical semitrailer vans by backing straight rearward and then raising and positioning
the MIL-VAN folding landing gear into their horizontal position with MIL-VAN semitrailer
dimensions, in mm (inches), as follows:
a
Kingpin to front of semitrailer:
600 (23.625)
b.
Kingpin to transverse plane at front of landing legs:
1290 (50.875)
c.
Transverse distance between landing legs:
1780 (70)
d.
LWC from kingpin to leading edge of landing
legs/wheels:
1550 (61)
e. Fifth wheel plate height, measured from ground level
at centerline of kingpin:
1190 (47)
In addition to the requirements of 3.5.4 through 3.5.4.2, the mud flap mounting shall be at a
slight angle to the vertical and as close as practicable to the rear of the rear wheels to provide
maximum clearance for the MIL-VAN semitrailer.
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