MIL-DTL-83298C
4.8.3.5 Stress degradation test (see 3.6.2.5). The assembly shall be tested as specified in
SAE-AS2078 and shall meet the requirements of 3.6.2.5. When necessary, the assembly shall be
drained and flushed with fluid in accordance with MIL-PRF-680.
4.8.3.6 Impulse test (see 3.6.2.6). Six hose assemblies shall be impulse tested in accordance with
SAE-AS2078 and shall meet the requirements of 3.6.2.6. The following details shall apply:
a. Prior to impulsing, two assemblies shall be oil-aged, two shall be air-aged, and two shall be
unaged.
b. The assemblies shall then be subjected at room temperature to the rated proof pressure
specified in table I for a minimum of 5 minutes.
c. The assemblies shall be tested as specified in SAE-AS2078.
d. Electronic measuring devices shall be used to determine and control the impulse pressures in
the inlet manifold to the magnitude as specified in SAE-AS603.
e. The impulse shall occur at 70 ±10 cycles per minute .
f. The rate of pressure rise shall not be less than 100,000 psi/sec (689.5 MPa/sec) or more than
200,000 psi/sec (1379 MPa/sec).
g. The test fluid shall be one of the high temperature test fluids specified in 4.3.3.
4.8.3.7 Thermal shock test (see 3.6.2.7). Two hose assemblies shall be thermal shock tested in
accordance with SAE-AS2078 and shall meet the requirements of 3.6.2.7. The following details shall
apply:
a. One hose assembly shall be air-aged and one assembly shall be unaged.
b. The assemblies shall then be subjected to the rated proof pressure specified in table I for a
minimum of 5 minutes.
c High temperature test fluid shall be as specified in 4.3.2.
4.8.3.8 Flexibility test (see 3.6.2.8). A hose assembly shall be tested in accordance with
SAE-AS2078 and shall meet the requirements of 3.6.2.8. The following details shall apply:
a. The distance between fitting ends shall be as specified in table XI.
b. The uncapped assembly shall be filled with oil conforming to one of the high temperature test
fluids specified in 4.3.2.
TABLE XI. Flexibility dimension. 1/
Size dash
Distance between
no.
fitting ends
inches (mm)
-4
6.50 (165)
-6
10.63 (270)
-8
12.25 (311)
-10
14.00 (356)
1/ Metric equivalents are given for
information only.
4.8.3.9 Volumetric expansion test (see 3.6.2.9). A hose assembly shall be volumetric expansion
tested in accordance with SAE-AS2078 and shall meet the requirements of 3.6.2.9. The change in fluid
level shall be recorded and the volume change shall be converted to cc/in.
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