MIL-V-62008B(AT)
3.6.13.14 Travel locks. The turret with turret lock engaged shall be prevented from
being traversed in any direction. With the gun external travel lock and the turret lock disengaged and the manual traverse handle in detent, the turret and gun control system shall act as a holding device for the gun and turret when the vehicle is in motion.
a. With the vehicle moving at a rate of 5 mph in low gear on a horizontal hard surface road, and with the elevation and traverse power switch off, the turret slippage shall not exceed 10 mils in traverse when subjecting the vehicle to a full steer 90 turn in either direction and coming to a sudden stop.
b. With the vehicle moving at a rate of 20 mph on a horizontal, hard surface road and with the elevation and traverse power switch on or off, the gun slippage shall not exceed 5 mils in elevation or depression when stopping the vehicle within 60 feet from the point of vehicle brake application.
c. The elevation hand crank shall not show any movement by turret induced reaction when vehicle is in motion as specified in (a) and (b) above, or by power operation of the turret and gun control systems.
3.6.13.15 Hydraulic pressure limit switch. When power traversing the turret at a rate not to exceed 65 mils per second, the hydraulic pressure switch shall activate the hydraulic control powerpack motor at a control system pressure gage reading of 880 to 1010 psi. With gunner and commander power and manual controls in neutral position, the hydraulic pressure switch shall deactivate the hydraulic powerpack motor control system pressure as indicated on the gage between 1150 and 1500 psi.
3.6.13.16 Elevation shut-off valve. With elevation and traverse power switch on, the movement of the main gun shall not exceed 2 mils in the elevation axis when the gunner power control handle is tilted forward and backward to its stop in either direction without actuating the palm switch in the gunner power control handle.
3.6.13.17 Turret traverse brake. With the elevation and traverse power switch on, and with the turret stationary, there shall be no traverse movement of the turret when the gunner power control handle is turned to its stop in a clockwise or counterclockwise traverse direction without actuating the palm switch in the gunner power control handle.
3.6.13.18 Hydraulic fluid.
3.6.13.18.1 Turret and gun control cleanliness. When all the requirements of the turret and gun control system have been met, and with hydraulic fluid discharged from the 2 gallon main accumulator and from the 1/2 gallon equilibrator accumulator, the hydraulic fluid in the control powerpack reservoir and the equilibrator charging manifold reservoir shall contain no more than 0.1 percent water contamination level and shall not exceed that shown in table IV.
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