 |
|||
|
|
|||
| ||||||||||
|
|  MIL-A-19736A(Wep)
3.1.3.4 Dissimilar metals: Dissimilar metals are defined in Standard Ms 33586. Dissimilar metals
in immediate contact shall be avoided. Where use of dissimilar metals in immediate contact is
unavoidable they shall be insulated.
3.1.3.5 Finishes and coatings: Finish shall be in accordance with Specification MIL-F-7179.
Aluminum parts shall be anodized in accordance with Specification MIL-A-8625. Steel parts, except
working surfaces and parts made of corrosion - resisting steel, shall be cadmium plated in accordance
with Specification QQ-P-416. Sliding surfaces of steel parts shall be chromium plated in accordiance
with Specification QQ-C-320 or other finish approved by the procuring agency. Finish of hydraulic
system components shall be in accordance with Specification MIL-H-8775.
3.1.3.6. Castings: Castings shall be clean, sound and free from blowholes, porosity, cracks and other
defects and shall conform to Specification MIL-C-6021, Class 1B.
3.1.4 Non-metallic materials.
3.1.4.1 Fuel resistance: Non-metallic material which is in contact with fuel shall withstand jet
fuels conforming to Spectification MIL-J-5624 and preservative compounds.
3.1.4.2 0-rings: O-rings subjected to fuel shall conform dimensionally to Standard MS 29513 and
physically to Specification MIL-P-5315.
3.1.4.3 Synthetic rubber: Unless otherwise specified, synthetic rubber shall conform to Specification
MIL-R-6855. Age controls for fuel system synthetic rubber parts shall be in accordance with ANA
Bulletin No. 410.
3.1.5 Selection of materials and parts: Specifications and standards for all materials, parts,
processes and equipment which are not specifically designated herein shall be selected in accordance
with the order of precedence set forth in ANA Bulletin No. 143. AN or MIL standard parts shall be
used wherever they are suitable for the purpose.
3.1.6 Conservation of material: Non-critical materials shall be used wherever practicable when
performance, interchangeability or reliability will not be adversely affected or production
significantly altered.
3.1.7 Threads: Pipe threads shall not be used except for permanently installed pipe-threaded plugs
and shall not be used in high strength aluminum} steel and corrosion-resisting steel. Straight screw
threads shall be in accordance with Specification MIL-S-7742. Thread inserts may be used subject
to the limitations of Standard MS 33633.
3.1.8 Locking of parts: All threaded parts shall be securely locked bY safety wiring, self-locking
nuts, cotter pins or other approved methods. Safety wire shall conform to Standard MS 20995 and shall
be used in accordance with Standard MS 33540. Self-1ocking nuts shall conform to Specification
MIL-H-25027 and shall be used in accordance with Standard MS 33588. Staking and use of lock washers
is not permitted.
3.1.9 Snap rings: Snap rings shall not be used where improper installation or dislocation of the ring
would cause failure of any component or assembly. Snap rings shall not be used where the accumulation
of tolerances could allow destructive end play or looseness. Snap rings shall not be used internally
in equipment. Snap rings may be used to lock bearing pins, non-pressurized end caps~ etc. in place.
Snap rings shall be capable of being installed and removed with standard pin-type pliers or other
standard tools.
I
3.1.10 Spring pins: Spring pins may be used in accordance with Standards 33547. Spring pins are
not acceptable in hydraulic systems.
3.1.11 Marking of fluid lines: Fluid lines shall be identified in accordance with Standard AND 10375.
3.1.12 Cleaning: All parts, components and equipment shall be clean and free from dirt, sand, metal
chips, and other foreign matter during and after assembly.
3.2 Air refueling systems.
3.2.1 Probe and drogue: The air refueling system shall utilize probe and drogue type equipment.
3.2.2 Compatibility: It is a design objective to make each tanker suitable for refueling models
4
-.
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals