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MIL-V-62008B(AT)
Table IV Maximum contamination limit (100 ML sample).
Particle size range (Microns)
Number of particles
Turret & gun control
Vehicle hydraulic control
5-15
128,000
15-25
22,000
25-50
4,050
50-100
720
Over 100
128
25-50
4,050
50-100
720
Over 100
128
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.
17

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