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|  MIL-M-60170A(MU)
4.6.7 Sealing.- The special testing equipment conforming to
4.5.2.3.1 shall be utilized in this test. During this test, the mount
shall be positioned as specified in 3.4. Insert the head assembly
device into the mount and mask the interior cavity of the Mount Assembly
10513500 to prevent water penetration (vertical splash) into the area of
the mount below the Gssket 10513302 during the rain test. All electrical
or mechanical connections not utilized and which are normally protected
in service, shall also be adequately sealed against moisture penetration.
The mount shall then be subjected to the rain test in accordance with
Procedure I of MIL-F-13926, except that when the direction of the rainfall
is varied to 45 degrees from the vertical, it shall be aimed so as to
strike the head assembly device. Immediately following the specified
exposure, the external surfaces of the mount and head assembly device
shall be dried by compressed air or blotting with water absorbing material.
Remove the mask from the interior cavity of the mount assembly and observe
for any water penetration. Remove the head assembly device and visually
inspect the device and interior surfaces of the mount assembly, below
the Gasket 10513302, for evidence of water penetration. The mount assembly
shall conform to the requirements of 3.6.
4.6.8 Insertion and removal.- The special testing equipment con-
forming to 4.5.2.3.3 shall be utilized for this test. Position the
mount on the holding device. Repeated installation of the head and body
devices into the mount shall be accomplished a minimum of 3 times. Ob-
serve for any evidence of binding or interference at each installation
and removal of the head and body device. The mount-shall conform to the
requirements of 3.7.1.
The wiper blade shall be raised during this test to avoid
CAUTION:
damage to the blade.
4.6.9 Operability. - The special testing equipment conforming to
4.5.2.3.3 shall be utilized for the following tests.
4.6.9.1 Periscope, locking lever.- Install the body assembly
device in the mount, then remove the body device. Perform this test a
minimum of 3 times. The Locking Lever 8589900 shall conform to the
requirements of 3.8.1.1, at the temperatures indicated in 3.8.
4.6.9.2 Shield actuating handle.- Manually operate the Handle
10542148 through its full range of travel. During this excursion, the
handle and shield shall conform to the requirements specified in
3.8.1.2, at the temperatures indicated in 3.8.
4.6.9.3 Handle locking latch.- Perform this test concurrently with
the test in 4.6.9.2. The handle locking latch shall conform to the re-
quirements of 3.8.1.3, at the temperatures indicated in 3.8.
4.6.9.4 Motor, wiper mechanism.- Install the head assembly device
into the mount. Energize the wiper motor with 24 volts dc (Vdc) applied
to Pins "A" and "B" for a period of 1 minute. During this 1 minute
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