MIL-T-45379 Tank, Combat, Full-Tracked, 105 Mm Gun, M60A3-TtsThis specification establishes the construction, performance and inspection requirements for M60A3 full-tracked combat tank equipped with a Tank Thermal Sight TTS.

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MIL-T-45379D(AT)

4.6.4.9.3.10 Turret traverse brake. To determine conformance to 3.5.9.3.10, the turret shall be placed in a level position and the turret azimuth noted on the azimuth indicator. With the gunner's power switch on and the stabilization switches off, the gunner's control handle shall be turned to its stop in a clockwise direction without actuating the palm switch. The azimuth indicator shall be observed for turret movement. The procedure shall be repeated in the counterclockwise direction. The turret shall then be power traversed at least 10° to the left with the gunner's controls, stopped, the position observed on the azimuth indicator and the gunner's control handle again turned to its right and then left stops without depressing the palm switch. The procedure shall be repeated after power traverse to the right. The azimuth indicator shall show no movement of the turret during any of these checks.

4.6.4.9.3.11 Elevation shut-off valve. To determine conformance to 3.5.9.3.11, the gunner's power switch shall be on, the stabilization switches off and without actuating the palm switch, the gunner's control handle shall be tilted forward and backward to its stop. Gun movement in the elevation quadrant shall not exceed 2 mils.

4.6.4.9.3.12 Travel locks. To determine conformance to 3.5.9.3.12, tests shall be conducted as follows:

a. Turret slippage tests shall be conducted with the turret lock disengaged and with the

105mm gun in a forward position. The vehicle shall then be operated on a smooth,

hard-surface road in low gear at a speed of 5 mph and given a full-left, 90° steer. Turret slippage shall be measured with the azimuth indicator. The pivot steer tests shall be repeated in full right, 90° steer.

b. For elevation or depression slippage tests, the 105mm gun shall be elevated 3 to 8° in a forward position. The vehicle shall be driven on a straight-course, hard-surface

road at 20 mph, stopped as specified, and the gun slippage measured with the M1A1 gunner's quadrant.

c. The hand traverse crank and the hand elevation crank shall be checked during road tests and during power operation of the turret for movement as specified.

d. The 105mm gun shall be clamped into the external travel lock and the internal turret lock shall be tested for capability of being placed in the locked position. Upon locking, the turret traverse controls shall be actuated and the turret shall remain locked.