MIL-P-19692E
3.4.3 Vibration. Pumps shall be capable of withstanding vibrations
excited by the driving means. For design and test purposes, torsional
vibration excited by the driving means shall be considered negligible. As
part of the qualification test, all pump models shall be subjected to the
vibration tests specified in 4.3.2.1.8.
3.4.4 Acceleration. All pumps shall be designed to withstand sustained
acceleration of 10g applied in any direction.
3.4.5 Atmospheric conditions. All pumps shall be designed to withstand
continuous exposure, as installed in the application and either operating or
non-operating, to salt spray as encountered in marine or coastal areas and to
sand and dust as encountered in desert areas. If resistance to other matter
is needed, these shall be identified in the detail pump specification.
3.5 Installation requirements.
3.5.1 Dimensions. Dimensions pertinent to the installation of pumps
aircraft shall be specified on the manufacturer's installation drawing.
3.5.2 Weight. Both wet and dry weights shall be specified on the
installation drawing.
3.5.3 Mounting. Unless otherwise specified in the detail pump
specification, all pumps shall incorporate a standard mounting flange in
accordance with one of the following standards:
MS3330 through MS3334 design standards for flanges having bolt circle
(BC) diameters 2.653", 5", 8", and 10"
3.5.3.1 Orientation. The case drain port of the pump shall be located at
or near the top of the pump as it is installed on its drive pad.
Reorientation of the pump due to vehicle attitude shall not affect pump
operation.
3.5.3.2 Direction of rotation. The direction of rotation of the pump
shall be clearly and permanently marked on an exposed surface of the pump
housing.
3.5.4 Drive coupling and bushing
A replaceable part of the pump
assembly, incorporating a shear section, shall be interposed between the pump
drive shaft and the driver such as an engine accessory drive shaft. The
coupling shall be positively retained to the pump drive shaft. The interface
between the coupling and the driver shall be as outlined in the detail pump
specification. For interface splines that are not force-lubricated, the
detail pump specification shall specify all material and dimensional aspects
of a non-metallic spline bushing to protect the driver. The shear
characteristics of the bushing shall be such that it does not fail before the
coupling shear section, and shall be capable of transmitting, as a minimum, a
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