SB 740-94-8
ducting a visual examination for
d. Release the pressure, dry
leakage, a shield shall be used. The
the hose assembly, and return serviceable assemblies
shield should be of sufficient
to storage.
strength to withstand an impact
(2) Test gage assemblies, fuel tanks.
resulting from a rupture of the test
Assemblies for Portable Flamethrowers M2A1 and
equipment or specimen.
M2A1-7 (assembly NSN 1040-00-654-5743), and M9-7
(1) Hose assemblies. Rubber, (NSN 4720-
and M9A1-7 (assembly NSN 1040-00-898-1284).
00-384-0494, also identified as Needle Valve and Hose
(a) Requirements
Assembly), Rubber (NSN 4720-00-289-2630), Charging
1. The assembly shall not leak and
(NSN 1040-00-859-2207), and Pneumatic (NSN 1040-
shall maintain an internal air pressure of 600-20 psig for
00-862-2540).
a minimum period of 60 seconds when tested as
(a) High pressure test requirement.
specified.
The hose assembly shall not leak and the spindle must
2. The test gage shall be accurate
work freely without binding when subjected to an internal
to 20 psig.
air pressure of 3500 + 50 pounds per square inch gage
(b) Equipment required.
(psig) for a minimum period of 60 seconds when tested
1. Regulated air pressure source
as specified.
(650 psig).
1. Equipment required
2. Water tank and water.
a. Regulated
air
pressure
(c) Procedure.
source (3600 psig).
1. Subject the fuel tank test gage
b. Water tank and water.
assembly to an internal air pressure of 600-20 psig for a
2. Procedure.
minimum period of 60 seconds with the assembly
a. Subject the hose assembly
submerged to the bottom of the gage.
to the specified internal air pressure for the specified
2. Do not exceed a pressurizing
time with the assembly submerged to a depth of 6 + 1
rate of 500 psig per minute.
inch.
3. Do not allow water to contact
b. Do
not
exceed
a
the gage.
pressurizing rate of 500 psig per minute.
4. Observe for bubbles which
c. Observe for bubbles which
indicate leakage.
indicate leakage and verify that the spindle works freely
5. Verify that 600-20 psig is
without binding.
maintained for a minimum of 60 seconds.
d. Release the pressure, dry
6. Check the test gage for a
the hose assembly, and return serviceable assemblies
minimum accuracy of 20 psig. Any gage out of
to storage.
calibration shall be readjusted, recalibrated, and
(b) Hydrostatic test requirement. The
retested.
hose assembly shall not leak when subjected to an
7. Release the pressure, dry the
internal hydrostatic (water), pressure of 3500 + 50 psig
fuel tank test gage assembly, and return serviceable
for a minimum period of 60 seconds.
assemblies to storage.
NOTE
(3) Test gage assembly, agent tank (NSN
Subject each high pressure hose
1040-00-898-1285).
assembly to a hydrostatic test
(a) Requirements.
immediately prior to issue, when the
1. The assembly shall not leak and
service kit has been in storage over
shall maintain an internal air pressure of 100 5 psig for
five years. The latest date of test
a minimum period of 60 seconds when tested as
must appear on a metal tag affixed to
specified.
the hose. In addition, ensure that the
2. The test gage shall be accurate
date on the forms required by TM 38-
to minor scale division.
750 is the same as the date on the
(b) Equipment required
hose.
1. Regulated air pressure source
1. Equipment required. Regulated
(120 psig).
source of hydrostatic (water) pressure (3600 psig).
2. Water tank and water.
2. Procedure.
(c) Procedure.
a. Subject the hose assembly
1. Subject the agent tank test gage
to the specified internal hydrostatic (water) pressure for
assembly to an internal air pressure if 100 + 5 psig for a
the specified time.
minimum period of 60 seconds with the assembly
b. Do
not
exceed
a
submerged to the bottom of the gage.
pressurizing rate of 500 psig per minute.
2. Do not exceed a pressurizing
c. Fluid seepage shall indicate
rate of 500 psig per minute.
leakage.
3. Do not allow water to contact
the gage.
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