2 ton, multi-fuel engine driven, six-wheel six-wheel drive, military design truck chassis, trucks, and truck tractors.

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MIL-T-46780D(AT)

4.3.1.6 Adjustment mechanism check. To determine conformance to 3.3.5, all adjustment mechanisms shall be checked for proper adjustment and adjusted if required.

4.3.1.7 Trucks tank fuel and fuel servicing (M49A2C) tank leak test. To determine conformance to 3.3.7, the tank of each truck shall be tested for leaks by a minimum air pressure

of 2 PSI applied to the whole tank and dome if it be non-compartmented. If compartmented each

individual compartment shall be similarly tested with adjacent compartments empty and at atmospheric pressure. Air pressure shall be maintained for a period of at least five minutes

during which the entire surface of all joints under pressure shall be coated with a solution of soap and water, heavy oil, or other material suitable for the purpose, foaming or bubbling of which

indicates the presence of leaks. All closures shall be in place during test. During this test operative relief devices shall be clamped, plugged or otherwise rendered inoperative; such

clamps, plugs and similar devices shall be removed immediately after the test is finished. Tanks failing to pass this test shall suitably be repaired and the above tests shall be continued until no

leaks are discovered. Every tank tested shall withstand such pressure without distortion or evidence of impending failure or failure. Failure to meet requirements is sufficient cause for

rejection.

4.3.1.8 Water tank truck (M50A3) body and components check. To determine conformance to 3.3.8 through 3.3.8.9 the water tank truck body and components, shall be checked for completeness and proper assembly stowage of hoses and other equipment shall be checked for ease of removal and for stability of retainment under all vehicles operating conditions. The tank piping and all fitting shall be checked for leaks. There shall be no leaks.

4.3.1.9 Truck maintenance pipeline construction check. To determine conformance to

3.3.9 through 3.3.9.4 and 3.3.9.6 through 3.3.9.8, the body and accessories shall be checked for

meeting requirements and overall dimensions specified on applicable drawings. Materials, wiring, welding and case of maintenance shall be as specified. The body components and controls shall be checked for performance, except vehicle operational requirements.

4.3.1.9.1 Removable cargo body check. To determine conformance to 3.3.9.5, all vehicles furnished with removable cargo body shall be checked for completeness of body and all equipment. The removable sides and tailgate shall be checked for binding and ease of removal. All equipment shall be checked for proper location and interference with other components. Bows, paulin and curtains shall be checked for damage and ease of installation.

4.3.1.10 Transfer case, front axle engagement check. To determine conformance to

3.4.4.2, each vehicle shall be operated and checked for front axle engagement on specified air

pressure.

4.3.1.11 Braking ability check (less payload). To determine conformance to 3.4.8, through 3.4.8.2, during tests, the ability of the brakes to stop and hold vehicle as specified shall be observed for functional requirements.