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)

3.5.3.4.11.3  Elevation response rate.  The gun at the horizontal position within plus or minus

1 degree, shall move at a minimum rate of 10 mils per revolution of the handcrank in elevation and depression.  The hand crank shall be turned at a rate not less than 10 rpm and not more than

20 rpm to measure the response rate (see 4.6.17.3.4.11.3).

3.5.3.4.12  Power and manual control.  The manual traverse and power elevation controls shall be capable of simultaneous use.  The same requirement applies to the power traverse and the manual elevation controls.  There shall be no movement of the gun or turret caused by

turning the elevation and traverse power switch on or off.  The gun firing switches shall function

individually with elevation and traverse power switch on or off and with either the main gun or the coaxial machine gun selector switches turned on (see 4.6.17.3.4.12).

3.5.3.4.13  Superelevation actuator.  The superelevation actuator shall maintain the gunner's periscope reticle on target within 2 mils after ranging has been accomplished (see 4.6.17.3.4.13).

3.5.3.4.14  Hydraulic fluid.

3.5.3.4.14.1  Hydraulic fluid cleanliness.  When all the requirements of the turret and gun control systems have been met, and with hydraulic fluid discharged from the 2 gallon accumulator, the hydraulic fluid in the control power pack reservoir shall contain no more than

0.1 percent water.  This fluid shall have a contamination level not greater than that shown below

(see 4.6.17.3.4.14.1).

TABLE VI.  Maximum contamination limit [100 milliliter (mL) sample].

3.5.3.4.14.2  Hydraulic fluid 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 leakage 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 (see 6.5.1) in two minutes (see 4.6.17.3.4.14.2).

3.5.3.4.15  Elevation shut-off valve.  With the elevation and traverse power switch on, the movement of the main gun shall not exceed 2 mils in the elevation axis when the gunner's power control handle is tilted forward and backward to its stop in either direction without actuating the palm switch in the gunner's power control handle (see 4.6.17.3.4.15).

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