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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.
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