MIL-T-62222 Tank, Combat, Full-Tracked: 105Mm Gun, M48A5This specification covers one type of full-tracked, armored combat vechiles, which mounts a 105MM gun as the primary weapon.

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MIL-T-62222(AT)

4.6.17.2.5.1 Holding. To determine conformance to 3.5.2.5.1, a load of 6000 lb shall be placed on the vehicle in a position that will not restrict the flow of engine air (intake or exhaust). The vehicle shall be driven up a 60 percent dry, hard grade and the service brakes checked, and then the parking brakes checked for conformance. Checks shall be made with the vehicle headed up and down grade.

4.6.17.2.6 Turning. To determine conformance to 3.5.2.6, the vehicle shall be operated and turned to right and to the left in full 360 degree pivot turn in neutral steer and checked for functional requirements. During this test, the vehicle shall be brought to a full stop before reversing the turning direction. The full turns shall be accomplished within a 35 ft diameter circle.

4.6.17.2.7 Fording.

4.6.17.2.7.1 Shallow water. To determine conformance to 3.5.2.7.1, the chassis shall be driven into water of specified depth with engine the compartment drain valve open and without special equipment. During and after this period, water accumulation in the crew compartment hull floor shall not be more than specified depth.

4.6.17.2.7.2 Drain valves. To determine conformance to 3.5.2.7.2, a force gage shall be attached to the end of the handgrip of the front valve lever and actuated as specified. The rear valve lever shall also have the gage attached and actuated as specified. The front and rear drain valve levers shall operate at the force specified and the valves checked for functional and dimensional requirements.

4.6.17.2.7.3 Turret inflatable seal and pump. To determine conformance to 3.5.2.7.3, a force gage shall be attached to the pump plunger and pump actuated to arrive at the specified pressure as indicated on the inflatable seal pressure gage. The maximum force shall be not more than that specified. The indicated pressure loss during a 30 minute period shall not exceed 5 psi.

CAUTION: The pressure shall be relieved at the conclusion of this test.

4.6.17.2.7.4 Engine start - shallow water. To determine conformance to 3.5.2.7.4, the engine starting capability shall be checked during shallow water operation. The engine shall be idled at

1000 rpm for 15 minutes, stopped and restarted in not more than 3 minutes with all accessories

functioning satisfactorily during and after test.

4.6.17.2.7.5 Deep water. To determine conformance to 3.5.2.7.5, when a fording kit is specified, the vehicle with kit installed shall be driven into a hard bottom body of water

96 inches in depth and remain at that depth for 30 minutes. The accumulation of water shall be checked and shall be not more than 2 inches on the crew compartment hull floor in the center of

the "V".

4.6.17.2.8 Trench crossing. To determine conformance to 3.5.2.8, the vehicle shall be driven at a speed not to exceed 5 mph without stalling over trenches as specified. The main gun shall be in the forward, fully elevated position. After the test, the vehicle shall be examined for damage.