MIL-DTL-14055G
6.1 Intended use. The wheel cylinder cups, master cylinder primary cups, and master cylinder secondary
cups are intended for use in wheel cylinders, master cylinders, and slave cylinders in hydraulic-brake
systems of trucks and other heavy-duty automotive equipment where the cylinder cups are subjected to
temperatures ranging from +248°F to -67° F (+120°C to - 55°C). Wheel cylinder cups, master cylinder
primary cups, and master cylinder secondary cups that are intended for use for commercial hydraulic
components are not designed to withstand these extreme conditions or sudden environmental changes,
and could experience catastrophic failure.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Size of cups.
c. 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 No. 14055,
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: 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 https://assist.dla.mil.
6.3.1 Provisions governing qualification (SD-6). Copies of "Provisions Governing Qualification" are
available online at https://assist.dla.mil or from the Standardization Document Order Desk, 700 Robbins
Avenue, Building 4D, Philadelphia, PA 19111-5094.
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).
6.5 Equivalent test methods. The index of test methods in FED-STD-791 lists the corresponding
equivalent test methods of the American Society for Testing and Materials where applicable.
6.6 Test materials. Metal strips, the standard compatibility fluid, and suitable test jars can be obtained
from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096.
6.7 Subject term (key word) listing.
fluid
Isopropanol
6.8 Changes from previous issues. The margins of this specification are marked with vertical lines to
indicate where changes from the previous issue were made. This was done as a convenience only and
the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and
contractors are cautioned to evaluate the requirements of this document based on the entire content
irrespective of the marginal notations and relationship to the last previous issue.
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