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MIL-F-5508B
be conducted on two samples of hydraulic
3.8 Age controls. Age-sensitive elasto-
fuses unless otherwise specified.
meric parts shall be in accordance with ANA
Bulletin No. 438.
4.4.1.1 Minimum clearance sample. One of
the hydraulic fuses to be tested shall be as-
4.
QUALITY ASSURANCE PROVISIONS
sembled of parts which have been selected to
provide that the clearance with regard to
4.1 Rsponsibility for inspection. Unless
linear and diametral tolerances between mov-
otherwise specified in the contract or pur-
ing and non-moving members, conducive to
chase order, the supplier is responsible for the
malfunctioning at extreme temperatures, will
performance of all inspection requirements as
not exceed 110 percent of the minimum de-
specified herein. Except as otherwise speci-
signed clearance permitted by the manufac-
fied, the supplier may utilize his own facilities
turer's drawings. For cases of sliding where
or any commercial laboratory acceptable to
packing friction would influence the perform-
the Government. The Government reserves
ance of the component, such as pistons oper-
the right to perform any of the inspections
ated by springs, etc, the maximum packing
set forth in the specification where such in-
friction anticipated shall be induced in the
spections are deemed necessary to assure sup-
test specimen. In these casees, "0" ring pack-
plies and services conform to prescribed
ing glands shall be designed to provide maxi-
requirements.
mum "0" ring squeeze, including the effect
4.2 Classification of tests. The inspection
of adverse "0" ring cross section tolerances
and testing of hydraulic fuses shall be classi-
and high swell fluids. This specimen shall be
fied as folllows:
marked "MTN".
(a) Qualification tests
4.4.1.2 Maximum clerance sample. The
(b) Acceptance tests
second specimen shall be assembled of parts
which have been selected to provide that the
4.3 Test conditions.
tolerances, with regard to linear, diametral
4.3.1 Test fluid. The hydraulic fluid used
and concentric tolerances between moving
members, coonducive to malfunctioning as a
for all qualification tests shall conform to
Specification MIL-H-5606. Acceptance tests
result of wear associated with prolonged
may be performed with oil conforming to
operation, will not be less than 90 percent of
Specification MIL-H-5606 or MIL-H-6083.
the maximum designd clearance permitted
by the manufacturer's drawings. This speci-
4.3.1.1 The test fiuid shall be continuously
men shall be marked "MAX".
filtered through a filter element which is
4.4.1.3 The manufacturer shall apply all
equivalent to a 25-micron absolute standard
tests of this specification to the MAX sample,
filter element. The filter and element used
with the exception of the high- and low-
shall be satisfactory for the temperature
temperature functioning tests. The MIN sam-
range encountered, and cleaned or changed
ple shall be subjected to the temperature
regularly to avoid clogging.
functioning test and acceptance test set forth
4.3.2 Temperature.  Except where other-
in this specification.
wise specified, tests shall be conducted at a
4.4.2 Test report and data. Upon satisfac-
room otemperature of approximately 210 C.
tory completion of the tests performed ac-
to 32 c. (70F. to 90 F.) and an oil tem-
COrding to 4.4.1.3, the manufacturer shall
peraoture of approximately 32 C. to 43 C.
o
forward one copy of a report of these tests
(90 F. to 110 F.). The oil temperature
and one set of prints of detail and assembly
during tests shall be recorded.
drawings to the preparing actitity, together
4.4 Qualification tests.
with a letter stating vendor's desire to obtain
qualification tests. Upon acceptance of the
4.4.1 Test samples. Qualification tests shall
3

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