Browning machine gun caliber .50, M2, aircraft, fixed and flexible. Page: 36
54 p. : ill. ; 22 cm.View a full description of this book.
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TM 9-225
19 ORDNANCE DEPARTMENT
pint of water), hot water alone, or, in the absence of these, cold
water. Before attempting to clean the gun, the groups should be
disassembled from the gun.
b. Use of rifle bore cleaner.-(1) Saturate a clean patch with rifle
bore cleaner and push it back and forth through the bore of the
barrel by means of a cleaning rod.
(2) Repeat the operation with clean patches two or three times,
and then use a clean dry patch to remove all the cleaner before
applying the prescribed lubricating oil for aircraft instruments and
machine guns.
(3) Engine oil, SAE 30, should be used to protect the bore if
the weapon is to remain out of service for several days. For long-
time storage, light rust preventive compound should be used in place
of oil. (Refer to (4) below.) However, before use, the gun should
be cleaned thoroughly and reoiled with lubricating oil for aircraft
instruments and machine guns.
(4) When guns are left mounted in aircraft ready for immediate
use, only lubricating oil for aircraft instruments and machine guns
should be used. Guns should be inspected and lightly oiled daily.
(5) Bore and chamber should be wiped free of oil before firing.
c. Use of soap and water solution.-(1) Place barrel, muzzle down,
in a vessel containing hot water and issue soap, a soda ash solution,
or, lacking these, hot or cold water alone.
(2) Insert cleaning rod, with a flannel patch assembled, in breach.
Move rod forward and back for about 1 minute, pumping water in
and out of bore.
(3) Use a brass or bronze wire brush while the bore is wet, running
it forward and back through the barrel three or four times.
(4) Pump water through bore again to clean.
(5) Dry the cleaning rod and remove barrel from water. Using
dry, clean flannel patches, thoroughly swab bore until it is perfectly
dry and clean. Thoroughly dry and clean chamber, using a flannel
patch on a stick if necessary.
(6) Saturate a patch with sperm oil and swab bore and chamber
with the patch. Allow a thin coat of oil to remain in the bore.
(Refer to (b) (3) and (b) (4) above.)
(7) Guns should be cleaned not later than the evening of the day
on which the gun is fired, preferably immediately after cessation of
firing.
(8) Inspect and clean guns for 3 days following cessation of firing.
d. Cleaning parts other than bore.-(1) Wipe receiver clean, care
being taken to remove dirt from belt holding pawl. Thoroughly36
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United States. War Department. Browning machine gun caliber .50, M2, aircraft, fixed and flexible., book, April 30, 1942; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc29988/m1/38/: accessed May 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.