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Page Title: Enclosure with integral reservoir of lubricant.
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3.20.1 Lubricants. The unit shall operate as specified herein when lubricated with military
lubricants (see 6.5).
3.20.2 Lubrication fittings. Lubrication fittings shall conform to MIL-F-3541, type I, II,
or III. Fittings shall be located in a protected position and shall be accessible to a grease gun
conforming to MIL-G-3859. Accessibility to fittings shall be provided without the removal of
adjustment of accessories or parts. Where oil holes are applicable, they shall have spring-loaded
covers. Panels and plates equipped with hand-operable, quick-disconnect fasteners may be
removed to provide accessibility. Grease fittings on electric motors shall be removed, after being
lubricated, and replaced with threaded, metal plugs.
3.20.3 Pressure release device. An automatic pressure-release device shall be provided
where the use of pressure lubricating equipment could damage grease seals or other parts.
3.20.4 Enclosure with integral reservoir of lubricant. Enclosures such as gear cases and
transmission housings which contain a reservoir of lubricants for the lubrication of the parts
enclosed shall be equipped with dipsticks, finger holes, or sight holes to determine the level of
the lubricant. Each enclosure shall be equipped with a magnetic drain plug not less than 1/2-inch
pipe size conforming to MS35844 or MS49006, and with a means for filling the enclosure with
lubricant. The drain plug shall be located so that removal of the plug will result in complete
drainage of the lubricant from the enclosure. Drainage shall be to the ground when the unit is in
its normal position. Integral tubes or troughs may be used to convey the lubricant from the drain
outlet to the ground. Accessibility to the drain plug, the filling means, and the lubricant-level
checking device shall be obtained without the removal or adjustment of accessories or parts,
except that panels and plates equipped with hand-operable, quick-disconnect, fasteners may be
3.20.5 Grease lubrication. All grease lubrication, including lubrication of sealed bearings,
shall be with greases conforming to MIL-G-10924 or MIL-G-23827, as applicable. The unit
shall be run-in (broken-in) and delivered with these greases. The bearings shall be cleaned
before lubrication because military greases are not normally compatible with other greases. A
tag attached in a conspicuous location shall indicate which military grease has been used.
3.20.6 Oil lubrication. Unless otherwise preserved for packaging (see 5.1), all components
shall be filled to the operating level with grades of military oils designated for use in the

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