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)

4.6.16.2.2 Exterior lights. To determine conformance to 3.4.15.2.2, the external lights shall be tested for operation as specified during and after the eight mile road test.

4.6.16.2.3 Generator voltage. To determine conformance to 3.4.15.2.3, the generator voltage shall be checked as specified.

4.6.16.2.4 Driver's infrared power pack high voltage supply. To determine conformance to

3.4.15.2.4, with the master battery control and infrared power switches turned on and generator supplying specified voltage, the voltage shall be measured at the driver's I.R. periscope loose harness plug using an 80 megohm load to simulate the I.R. periscope.

4.6.16.2.5 Air cleaner blower motors. To determine conformance to 3.4.15.2.5, the air cleaner blower outlets shall be checked for proper air flow during engine operation, and no flow when the engine is not operating.

4.6.16.2.5.1 Air cleaner outlet system. To determine conformance to 3.4.15.2.5.1, the filter shall be removed, the hose clamp at the turbocharger inlet shall be loosened, and the outlet system shall be sealed off at both ends and pressurized to a vacuum pressure between 25 and

30 inches of water. Maintain turbocharger inlet cleanliness during test and when re-attaching the

hose clamp.

4.6.16.2.6 Engine manifold heater. To determine conformance to 3.4.15.2.6, the pushbutton switch on the purge pump handle and the starter switch shall be actuated and pin "a" of the

engine electrical disconnect shall be checked for proper voltage.

4.6.16.3 Turret electrical.

4.6.16.3.1 Main gun firing circuits. To determine conformance to 3.4.15.3.1, the following tests shall be conducted:

a. With a 1.25 A load connected at the circuit output, the voltage across the load shall be tested with a voltmeter for presence of vehicle voltage as each firing trigger is

actuated and the voltage is recorded.

b. Tests shall be conducted for proper probe grounding as specified, the dead man switching feature, and proper interconnection of 1) the emergency switch on the manual elevation pump handle and 2) emergency mode firing with the blasting machine.

4.6.16.3.2 Emergency mode firing. To determine conformance to 3.4.15.3.2, the blasting machine circuits shall be checked for sufficient power to fire the main gun.