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)

3.5.9.3.18.1  Cleanliness.  When all the requirements of the turret and gun control system have been met, and with hydraulic fluid discharged from the 2 gallon accumulator, the hydraulic fluid in the control powerpack reservoir shall contain no more than 0.1 percent water.  This fluid shall have a contamination level of not greater than that of table VI (see 4.6.4.9.3.18.1).

TABLE VI.  Maximum contamination limit (100 ml sample).

3.5.9.3.18.2  Leakage.  Turret and gun control system hydraulic fluid leakage shall be permissible in the form of a weep or seep.  There shall be no evidence of fluid 1eakage in the form of a drop or drip other than that specified herein.  There shall be no drip from the deck clearance valve assembly.  Fluid leakage (drip) from the control power pack at the override linkage control box shall not exceed 1 drop in two minutes.  Fluid loss from the main gun recoil mechanism or replenisher shall not exceed 15 drops in a 3 minute period during and immediately after the completion of firing or exercising of the recoil mechanism.  No fluid loss in the form of a drip or drop shall be permitted 2 hours subsequent to firing or exercising the main gun

(see 4.6.4.9.3.18.2).

3.5.9.4  Cupola weapon control.

3.5.9.4.1  Traverse effort.  Azimuth gear box starting torque, for right or left traverse, shall be not more than 30 lbf in to start motion from any position within 360° rotation (see 4.6.4.9.4.1).

3.5.9.4.2  Elevation effort.  With the machine gun, flexible feed chute, canvas cover and the periscope linkage installed, the screwjack handle breakaway torque shall not exceed the following (see 4.6.4.9.4.2):

15° depression to 60° elevation, 25 lbf in.

60° depression to 10° depression, 25 lbf in.

10° depression to 15° depression, 35 lbf in.

3.5.9.4.3  Elevation limits.  The cradle with machinegun, sighting system, and cradle cover installed shall elevate and depress at least between +60°and -15° (see 4.6.4.9.4.3).

3.5.9.5  Fire control system.  Except as otherwise specified herein, the fire control system shall operate and meet all requirements specified herein under operating conditions specified in

3.5.9.3 (see 4.6.4.9.5).

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