Ordnance maintenance : Browning machine gun, caliber .50, all types Page: 22
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TM 9-1225
33-35 ORDNANCE MAINTENANCE
(2) To pack muzzle end.-With the gun assembled, with or without
the bolt, allow the bolt to go forward or trip the accelerator so that
the barrel is fully forward. Remove the muzzle gland (M1921 gun)
or muzzle radiator (M1921A1 gun). Wind the packing in even layers
about the barrel with the first coil as close as possible to the end cap.
Push back the muzzle or draw back and hold the bolt, at the same
time guiding the packing into its seating. Screw in the muzzle gland
or muzzle radiator, and test friction of the mechanism by releasing
the bolt handle several times. If there appears to be too much fric-
tion, remove one or two coils of packing. The muzzle gland, or muzzle
radiator, must be screwed up so that its shoulder is against the metal
of the end cap, and not stopped by jamming against the packing.
34. Mounts.-a. Burs on screw heads, cams, and smooth sur-
faces.-Follow procedure outlined in paragraph 22.
b. Loose head or shoe in leg (tripod M1).-Remove loose rivets,
replace and rivet.
c. Burs on gear teeth (tripod and pedestal mounts M2).-Remove
burs on gear teeth with a sharpening stone (preferably) or fine file,
and finish with crocus cloth if necessary. Care must be exercised to
remove as little metal as possible.
d. Damaged paint.-Scrape surface lightly, clean thoroughly, and
repaint. Surface must be bone dry before painting.
35. Care, cleaning, and lubrication.-For specific instructions
covering care, cleaning, and lubrication of machine guns, mounts, and
other materiel covered in this manual, see Field Manuals and
Technical Manuals (pertaining to the gun) listed in the appendix.
a. In Arctic climates.-(1) Special care, cleaning, and lubrication
of machine guns are necessary for their proper functioning in Arctic
climates where extremely low temperatures are encountered. For
proper materials for cleaning and lubrication in Arctic climates see
TM 9-850 and SNL K-1.
(2) Antifreeze .solution, ethylene glycol, is authorized for use in
water jackets of machine guns for cold climates. It is satisfactory
for temperatures as low as - 60 F. when mixed with wate' in the
proper proportions. It is highly important that the proper propor-
tions of ethylene glycol and water be maintained. Protection against
freezing at temperatures as low as -62 F. can be obtained with a
mixture consisting of 60 percent by volume of ethylene glycol and
40 percent by volume of water. More or less water than this amount
will give a freezing temperature above - 62o F., due to the peculiar
characteristics of the mixture.22
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United States. War Department. Ordnance maintenance : Browning machine gun, caliber .50, all types, book, June 12, 1942; Washington, D.C.. (https://digital.library.unt.edu/ark:/67531/metadc29982/m1/24/: accessed May 20, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.