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)

4.3.3.2 Special kits operational tests. To determine conformance to 3.3.1 through

3.3.1.7, a specific kit when furnished with a vehicle or subsequent to arrival of vehicle for testing

the kit shall be installed on vehicle and checked for operational requirements.

4.3.3.3 Water-tank trucks, capacity, and tire chain clearance check. To determine conformance to 3.3.8, the tank shall be filled to capacity and vehicle operated as specified, and checked for capacity requirements and tire chain clearance.

4.3.3.4 Equipment cabinet test. To determine conformance to 3.3.8.3, the equipment shall be stowed as specified and vehicle operated cross country as specified in table XII, and equipment checked for damage.

4.3.3.5 Heating chamber check. To determine conformance to 3.3.8.6, during this test the heat shall be put through the chambers, the two-way valve and control operated, exhaust-gas outlet checked for exhaust escape, and heat chamber function.

4.3.3.6 Environmental operational tests. To determine conformance to 3.4.1, the vehicle, properly serviced and equipped shall be subjected to the applicable tests in high and low temperatures.

4.3.3.7 Vehicle loading tests. To determine conformance to 3.4.2, the specific vehicle furnished for this test shall be loaded as specified (see 6.6, Table XIV).

4.3.3.8 Vehicle operational test. To determine conformance to 3.4.3, through 3.4.5.2, vehicle shall be loaded to GVW, operated as specified and checked for cross country, highway performance, and cooling system requirements.

4.3.3.9 Water fording test. To determine conformance to 3.4.6 the vehicle shall be operated in water of a minimum of 30 inches in depth for at least 15 minutes. While vehicle is submerged shut the engine down for a minimum of one minute and restart. Immediately following the fording test, vehicle shall be examined for evidence of water leaks. Remove all wheels and hubs and examine bearing areas for evidence of water, drain the oil from the differentials, transmission and transfer cases and examine for evidence of contamination by water. Any evidence of contamination by water shall be cause for rejection of the vehicle.

4.3.3.10 Grade and side slope tests. To determine conformance to 3.4.7 through 3.4.7.2, the vehicle shall be operated on specified grades, slopes, and checked for performance requirements.

4.3.3.11 Service and parking brake test. To determine conformance to 3.4.8 through

3.4.8.2, the vehicle shall be operated on level roadway and specified grades, and the braking

systems checked for operational requirements.