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)

4.3.2.1 Test failure. If the vehicle selected fails to comply with the requirements specified herein it will be cause for Government refusal to continue acceptance of vehicles until evidence has been provided by the contractor that corrective action has been taken to eliminate the conditions.

4.3.2.2 Special kits check. To determine conformance to 3.3.1 through 3.3.1.7, a specific kit when furnished shall be installed on vehicles, and checked for proper installation or interference with other components. When installation of kits require permanent change in vehicle configuration or adaption, such as weldments, drilled holes, metal cutouts, etc., prior approval must be obtained from the Procuring Contracting Officer. When testing Arctic Kits,

3.3.1.2 and 3.3.1.2.1, for conformance the Carbon Monoxide Concentrations must be measured and comply to levels cited in Materiel Test Procedure 2-2-614 (see 4.3.2.8.6).

4.3.2.3 Stowed material check. To determine conformance to 3.3.6 all manufacturer and depot installed OVM shall be stowed on the selected vehicle. All items shall fit in the spaces provided. The equipment shall be removed after the check. The OVM used shall be of the latest configuration available to the contractor.

4.3.2.4 Fuel tank body and piping leak test (M49A2C). To determine conformance to

3.3.7, after the 50 mile road test, each compartment and all joints and piping shall be tested for

leaks by the air and bubble method (see 4.3.1.7) and as follows:

Using the vehicle fueling equipment, one tank compartment shall be filled with

600 gallons of number 1 diesel oil, or solvent conforming to P-D-680. All welds adjacent

to the tank compartment and the emergency relief valve shall be examined for leaks. The compartment shall be emptied, and, the same procedure shall be repeated on the other tank compartment. During tests, all piping and valves shall be checked for leaks and function. Leaks shall be corrected by rewelding or tightening. On completion of repairs unit shall be retested in accordance with the above procedure.

4.3.2.5 Catwalks functional tests. To determine conformance to 3.3.8.7 vehicle shall have a set of bows, covers, and end curtains installed, and checked for interference, ease of installation, resemblance on the cargo trucks, and ability to withstand lifting stresses.

4.3.2.6 A-frame power take-off, winch operational and lifting test (M756A2). To determine conformance to 3.3.9.4.1 and 3.3.9.9, with the A-frame winch and all controls including the rear power-take-off installed on the vehicle the winch, all controls and A-frame shall be functionally tested for lifting and transporting the specified load. Any loosening or shifting of components shall constitute a failure of this test.