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test shall be equal to or exceed the accuracies depicted on
Pressure Test Drawing F8565556.
4.8.13.12 Purging. Connect the test equipment to the purging
valve of the telescope. Adjust the dry nitrogen pressure to the
pressure specified in 3.8.2. The pressure is to remain constant
(6.0 1/4 psi) until the dew point of the emergent gas is no
higher than -25F. Disconnect the purging apparatus when the
relief valve has reseated to maintain an internal pressure of 3
0.10 psig.
4.9 Interchangeability. Each telescope shall be inspected
for maximum fit condition using interchangeability gage 11747956,
and meet the requirements of 3.4. Any telescope shich will not
enter and properly seat on the mounting surfaces of the gage shall
be rejected.
4.10 Packaging
inspection. The preservation, packing
and
marking shall be inspected to verify conformance to the
requirements of 5.1.
5.
PACKAGING
5.1 Packaging, packing, and marking. Packaging, packing,
and marking shall be in accordance with MIL-P-14232 and Packaging
Data sheet 11741626. The level of protection shall be as
specified in procurement document.
6.
NOTES
(This section contains information of a general or
explanatory nature that may be helpful, but is not manditory.)
6.1 Intended
use. The Telescope Elbow M138, when mounted on
Telescope Mount and Quadrant M172, is primarily intended to lay
the M198 Howitzer in azimuth and elevation for direct fire.
6.2 Acquisition requirements.
Procurement
data
should
specify the following:
a.
Title,
number
and
date
of
this
specification.
b.
Selection of an
applicable
level
of
preservation,
packaging, and packing.
c.
Applicable
packaging
data
sheet
number
(See
5.1).
I
d.
Applicable
stock
number.
e.
Provisions
for
First
Article
Testing.
16
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