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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].
Particle size range (microns)
Number of particles
5 to 15
128,000
15 to 25
22,800
25 to 50
4,050
50 to 100
720
over 100
128
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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