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Table VI. Maximum contamination limit (100 ml sample) |
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|  MIL-T-45379D(AT)
3.5.9.3.18.1 Cleanliness. When all the requirements of the turret and gun control system
have been met, and with hydraulic fluid discharged from the 2 gallon accumulator, the hydraulic
fluid in the control powerpack reservoir shall contain no more than 0.1 percent water. This fluid
shall have a contamination level of not greater than that of table VI (see 4.6.4.9.3.18.1).
TABLE VI. Maximum contamination limit (100 ml sample).
Particle contamination range (Micrometers)
Number of particles
15
5 to
64 000
25
15 to
11 400
50
25 to
2025
100
50 to
360
64
Over
100
3.5.9.3.18.2 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 1eakage 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 in two 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
(see 4.6.4.9.3.18.2).
3.5.9.4 Cupola weapon control.
3.5.9.4.1 Traverse effort. Azimuth gear box starting torque, for right or left traverse, shall be
not more than 30 lbf in to start motion from any position within 360 rotation (see 4.6.4.9.4.1).
3.5.9.4.2 Elevation effort. With the machine gun, flexible feed chute, canvas cover and the
periscope linkage installed, the screwjack handle breakaway torque shall not exceed the
following (see 4.6.4.9.4.2):
15 depression to 60 elevation, 25 lbf in.
60 depression to 10 depression, 25 lbf in.
10 depression to 15 depression, 35 lbf in.
3.5.9.4.3 Elevation limits. The cradle with machinegun, sighting system, and cradle cover
installed shall elevate and depress at least between +60and -15 (see 4.6.4.9.4.3).
3.5.9.5 Fire control system. Except as otherwise specified herein, the fire control system
shall operate and meet all requirements specified herein under operating conditions specified in
3.5.9.3 (see 4.6.4.9.5).
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