MIL-V-62008 Vehicle, Combat Engineer, Full Tracked, 165 Mm Gun, M728This specification covers one type of full-tracked armored combat vehicle which mounts a 165MM gun as primary weapon.

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MIL-V-62008B(AT)

Table IV - Maximum contamination limit (100 ML sample).

3.6.13.18.2  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 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 one drop in 2 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.

3.6.14  Fire control systems.  Unless otherwise specified, the fire control system

shall operate and meet all requirements specified herein under operating conditions specified in 3.6.12.1.

3.6.14.1  Synchronization of gunner periscope and gun tube bore.  The line of sight of the gunner periscope (daylight system only) shall move in synchronization with the centerline of the gun tube bore within plus or minus 0.3 mil in both elevation and deflection in all gun positions from horizontal to 15   elevation.  The telescope shall move in synchronization with the

centerline of the gun tube bore within plus or minus 0.1 mil in both elevation and deflection at

15   elevation and 5   depression.  The gun tube bore centerline at 15   elevation shall be within

0.5 mil of a plane perpendicular to the plane of traverse and coincident with the line of sight of

gun when gun is at zero elevation.

3.6.14.2  Elevation backlash.  Elevation backlash in the gunner periscope shall not exceed

0.3 mil for any gun position from 10   depression to 20   elevation.

3.6.14.3  Boresight knob travel.  The boresight knobs on the gunner periscope and the telescope mount shall be adjustable to a minimum of 5 mils down, 2 mils up, 4 mils left, and

4 mils right as measured from the boresight position.

3.6.14.4  Unity sight knob travel.  Rotation of the gunner unity sight knobs in elevation and deflection from stop to stop shall cause the reticle to travel a minimum of 20 mils.

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