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|  3.4.3.1 Straining element. The straining element shall be made of
corrosion-resistant wire mesh or of disposable material as specified by the model
specification The degree of filtration required shall be specified by the model
specification. The straining element shall be capable of being removed quickly and
easily without the use of special tools. The element shall be designed to prevent
improper installation.
3.4.3.2 Sump capacity. - The sump capacity shall be as specified in the
model specification. The sump shall be equpped with a drain valve conforming
to MIL-V-25023.
3.4.4 Threaded connections, -
3.4.4.1 Screw threads.
- Screw threads shall conform to MIL-S-8879.
3.4.4.2 locking of parts. - All threaded parts shall be locked by safety
wiring, by self-locking nuts conforming to MIL-N-25027, cotter pins, or
other approved methods. Safety wire shall be installeld in accordance with
MS33540, and shall conform to MS20995.. Self-locking nuts shall be used in
accordance with MS33588. Where loosening or disengagement of the self-locking
nut could result in the nut or other parts entering the fuel system, approval
of the installation shall be obtained from the procuring activity. The
use of lockwashers or staking is not permitted
3.5 Performance. - Fuel system
. shall satisfy the performance
tests as specified in section 4
requirements when subjected to the
and in the model specification. The model specification shall specify the
maximum pressure to be applied to the filter element during the test specified
in 4.6.2, and the maximum allowable pressure drop required by 4.6.7.
3.6 Identification of Product and Marking. - Equipment, assemblies, and parts shall
be marked for identification in accordance with MIL-STD-130.
3.6.1 Nameplate. - A nameplate shall be securely attached to the strainer,
or the information may be etched, engraved, embossed, or stamped in a suitable
location on the component. In addition to marking required by MIL-STD-130, the
following shall be included:
(a) Contractor's model specification
(b) Serial number (maybe deleted if the strainers not
normally identified by a serial number).
3.6.2 Direction of Flow. - The direction of flow shall be permanently marked on the
strainer.
3.6.3 Color Code. - The strainer shall be color coded per the requirements of MIL-F-8615.
s
3.7 Drawings. - Manufacturer assembly and detail drawings and associated lists
shall conform to MIL-D-1000.
3.8 Workmanship. - Attention shall be given to neatness of assembly, alignment of
parts, tightness of assembly screws and bolts, marking of parts, painting, and
removal of brrs and sharp edges.
3.8.1 Clearing. - All parts shall be clean and free from dirt, sand, metal chips,
and other foreign matter during and alter assembly.
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