MIL-STD-2193C(SH)
5.2.12 Function-adjustment screws. Function-adjustment screws, if used, shall maintain adjustment under all the required conditions of vibration, shock, temperature, and end operation. Friction-type locking devices shall be kept to a minimum and shall be subject to the approval of the contracting activity. If friction-type locking devices are used, the adjustment screws shall maintain their setting after adjusting through the full range 15 times, or as
specified in the component specification, and then vibration tested as specified in 5.3.8. The adjustment screws shall be adjusted and locked with a standard wrench or screwdriver. Where practicable, the adjustment screws shall
adjust under full system pressure with negligible loss of fluid. The means of adjustment shall be either internal or protected from tampering by a cover or similar device.
5.2.13 Bleeding and sampling. The configuration of components shall minimize the potential for air pockets; however, when required, provisions shall be made for bleeding of entrapped air. Auxiliary bleed ports shall be provided when necessary, and bleed plugs shall conform to SAE-AS5169. Valves in accordance with
MIL-DTL-24695/l may be used for bleeding and venting and shall be used where sampling of fluid is required or where a pressure test station is required.
5.2.14 Fluid connections. Fluid connections shall be static 0-ring seal bosses, flanges, quills, or 0-ring unions as listed in MIL-STD-438 or MIL-STD-777, as applicable. Tapered pipe threads shall not be used.
5.2.14.1 Bosses. Internally threaded bosses for connecting fittings and plugs shall conform to table II, straight thread 0-ring boss. Bosses shall be deep enough, or shall incorporate fitting stops, to prevent damage to internal mechanism or restriction of fluid flow when universal fittings are screwed into the bosses to excessive depths.
5.2.14.2 External tube connections. External male threaded tube connections shall conform to SAE-J1926/2 or
SAE-J1926/3 thread dimensions for mating with straight thread 0-ring bosses.
5.2.14.3 Flanges. Flanges shall conform to MIL-DTL-24704 or SAE-J518 except other flanges identified in the applicable hydraulic sections of MIL-STD-438 and MIL-STD-777 or in component specifications referenced therein may also be used when applicable.
5.2.14.4 Fluid connection marking. Ports shall be clearly and permanently marked to indicate the connections to be made using standard nomenclature. Where applicable, the directions of flow shall be indicated.
5.2.14.5 Connector tubes. Internal connecting tubes shall be in accordance with SAE-J24714.
5.2.15 Lifting and handling attachments. Attachments for lifting eyes or handles shall be provided when the weight of the component exceeds 23 kilograms (50 pounds).
5.2.16 Identification of product. Each component shall be identified by means of a nameplate conforming to MIL-DTL-15024. A faying surface sealant conforming to MIL-PRF-81733 Type IV shall be used under mechanically fastened nameplates to prevent corrosion.
5.2.16.1 Marking. A nameplate shall be installed on the component to identify:
a. Standard part number or specification number, if applicable, manufacturer's name, and part number.
b. Fluid power symbol in accordance with SAE-AS1290. This is not required for small components where compliance is not practical.
c. Component operational data, if required by the component specification.
5.2.17 Lubrication. Unless otherwise specified by the acquisition component specification or applicable detail shipbuilding specification, if lubrication is necessary during assembly, the lubricant shall facilitate adequate fastener preload during installation and, if the fastener is in contact with the system fluid, shall be compatible with the system fluid.
5.3 Test procedures. The hydraulic components shall be tested in accordance with the applicable component specification. The specific test procedures identified herein should be included as applicable in the component specification (see 6.1).
5.3.1 Test conditions. The applicable test conditions shall be specified in the component specification. The specific test procedures identified herein should be included as applicable in the component specification (see 6.1).
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