MIL-HDBK-134 Truck And Truck Tractors, Tactical \(Military\) Design, Characteristics OfThis standardization is not complete in itself for the engineer to accomplish the design of a tactical truck tractor. It is a supplement to the more complete and detailed documents that define a proposed vehicle, such as contractual requirements, Federal of Military specifications and standards, drawings, and the handbooks, specifications, and standards of professional societies that are acceptable to the Government. The objective of the standardization handbook is to state in summary from what the Government desires in a tactical trucks and truck tractors.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17

MIL-HDBK-134A

15 October 1965

4.1.9.6 Standard parts. Use of special parts should be kept to the minimum. Where parts already

in the military supply system are not applicable standard commercially available parts should be used

wherever practicable. However, any design of component which will improve performance, simplify

operation or maintenance, or reduce cost of production or operation of the vehicle should be considered.

4.1.9.7 Loose parts. Loose parts should be kept at a minimum. Wherever practicable, small parts

should be attached to larger parts, or otherwise retained to minimize loss.

4.l.9.8 Ground pressure. Overall design should be such that unit ground pressure under vehicle

tires will be the minimum practicable.

4.1.9.9 Clearance. Angles of approach and departure clearances under axles and amidships, and

clearance between prime mover and towed vehicle should be the maximum consistent with other

considerations

(a) Angles of approach and departure should be not less than 35 degree under full load, if

practicable.

(b) Clearance under chassis amidship should be such as to avoid interference when vehicle is

loaded into aircraft (22 degree ramp angle) or Landing Ship, Tank (LST) (30 degree ramp

angle).

4.1.9.10 Truck chassis.

4.1.9.10.1 Engine. Engine should be suitable for use of Army standard engine fuel (gasoline and

diesel), and should be of adequate capacity to enable vehicle to meet all stated performance requirements.

4.1.9.10.2 Air cleaner. Air cleaner should be a high efficiency type, and of sufficient capacity to

effectively protect the engine during eight hours of operation under severe dust conditions (see 5.3.6).

4.1.9.10.3 Steering. Steering gear should be such as to enable the driver to control vehic1e during

all phases of operation without difficulty or excessive fatigue.

4.1.9.10.4 Transmission and transfer case. Transmission and transfer case should be of suitable

design to provide maximum practicable ease of gear shifting, and should have such ration as to minimize

required frequency of gear shifting during normal operation.

4.1.9.10.4.1 All wheal drive. Means should be provided if practicable, to engage and disengage

front wheel drive, unless an interaxle differential is provided, and to shift to or from any gear in any range,

without damage while vehicle is in motion.