MIL-DTL-5515F
4.6.6 Volumetric efficiency. Mount the pump and associated test equipment as specified on figure 2. Operate the
pump at not less than 55 cycles per minute. Determine output volume per cycle (see 3.6.7.1) for calculating
volumetric efficiency.
4.6.7 Endurance. Mount the pump and associated test equipment as specified on figure 2. The suction shall be not
less than 5 inches. Means shall be provided to open flow (0 psi output pressure) and regulate output within ±50 psi of
required operating pressure. Operate pump at 30 to 40 cycles per minute at not less than 95 percent of full stroke as
follows:
a. Operate pump for 10,000 cycles at required output pressure and determine leakage.
b. Operate pump at open flow (0 psi output pressure) sufficiently to determine volume per cycle for calculating
volumetric efficiency (see 4.6.6).
c. Repeat a and b above until 70,000 cycles have accumulated.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. This specification is being retained as a military detail specification because of the unique military
requirements for use in aircraft type I hydraulic systems conforming to and as defined in SAE-AS8775.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Class and quantity of pumps to be acquired.
c.
Part or Identifying Number (PIN).for applicable class and specification sheet.
d.
Packaging requirements (see 5.1.)
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which are,
at the time of award of contact, qualified for inclusion in Qualified Products List QPL No. 5515, whether or not such
products have actually been so listed by that date. The attention of contractors is called to these requirements; and
manufacturers are urged to arrange to have the products that they propose to offer to the Federal Government tested
for qualification in order that they may be eligible to be awarded contracts or orders for the products covered by this
specification. Information pertaining to qualification of products may be obtained from DLA Land and Maritime, P.O.
Box 3990, ATTN: DSCC-VQ, Columbus, Ohio 43218-3990 or emailed to vqp.chief@dla.mil. An online listing of
products qualified to this specification may be found in the Qualified Products Database (QPD) at
6.3.1 Requalification. If a pump design is modified in any way, the modified form must be subjected to and pass the
same qualification tests as the original design.
6.4 Environmentally preferable material. Environmentally preferable materials should be used to the maximum
extent possible to meet the requirements of this specification. As of the dating of this document, the U.S.
Environmental Protection Agency (EPA) is focusing efforts on reducing 31 priority chemicals. The list of chemicals
and additional information is available on their website https://www.epa.gov/osw/hazard/wastemin/priority.htm.
Included in the EPA list of 31 priority chemicals are cadmium, lead, and mercury. Use of these materials should be
minimized or eliminated unless needed to meet the requirements specified herein (see Section 3).
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