MIL-T-62735 Trucks And Truck Tractors: Modified Commercial, General Specification ForThis specification covers general requirements for the classes, models and types of modified commercial trucks indicated in the specification title above and in 1.2 below. This specification is intended only as a document to be referenced in detail specification sheets that must, as a minimum, cover detailed truck body requirements and specify the model and class required from table I.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46 - 47 - 48 - 49 - 50 - 51 - 52 - 53 - 54 - 55 - 56 - 57 - 58 - 59 - 60 - 61 - 62 - 63 - 64 - 65 - 66 - 67 - 68

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.