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Subassembly torque requirements |
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|  MIL-R-81202D(AS)
first article should consist of five receiver assemblies. The contracting
officer should include specific instructions in all procurement instruments
regarding arrangements for examinations, test and approval of the first
article.
6.5 Contract or purchase order provision. Contracts or purchase orders
should specify the following provision for first article inspection. "When a
-
contractor is in continuous production of the receiver assemblies applicable
to this specification from contract to contract, consideration shall be given
to waive the first article inspections. However, waiver of first article in-
spections shall not relieve the contractor of his obligation to fulfill all
other requirements of the specification and contract." The words "purchase
order" should be substituted throughout for the word "contract" when appli-
cable.
6.6 Subassembly torque requirements. The torque values for the install-
ation of the subassemblies to the nitrogen receiver are as follows:
225 +/-25 inch pounds
a.
Relief valve
100 +/-25 inch pounds
b.
Pressure indicator
+25
250 -0 inch pounds
Filter cartridge fitting
c.
450 +/-25 inch pounds
d.
Seal valve
275 +/-25 inch pounds
e.
Charging valve
The charging valve closing torque is 50 +/-5 inch pounds.
6.7 Cleaning and assembly procedure. The following procedure is suggested
for cleaning and assembling LAU-7 nitrogen receivers. The procedure entails a
filtered liquid flush to remove gross particulate matter, followed by a vacuum-
heat-pressure gas purge to remove final particulate matter and gaseous contam-
ination. The parts are cleaned of particulate material prior to installation
and are cleaned of gaseous contamination with the receiver. The procedure is
most effective if carried out in one continuous operation through 6.6.2.2.6.
If this is not done, it is necessary to store flushed receivers and parts in
such a reamer as to prevent particle contamination.
6.7.1 Precleaning.
If manufactured and packaged in accordance with cognizant
a.
military specification, parts are precleaned as supplied.
b.
The receiver shall be precleaned to remove machining oils,
residues and scale using standard commercial procedures
that will not damage the interior lining material.
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