FM 23-45 Basic Field Manual
13
e. Spare parts.
— Spare parts must be kept free of dirt and moisture and be lightly
coated with oil. When first received, all traces of rust-resisting compound should be
removed.
■24. C
ARE DURING COLD WEATHER.
a.
Use aircraft instrument and machine gun lubricating oil (U. S. A. Spec. 2-27D) for
a lubricant.
b
. Test the gun frequently to see that it functions properly.
■25. C
ARE DURING GAS ATTACK.
a
Cover ammunition, if practicable.
b
. Oil gun and mount to prevent corrosion (effective for about 12 hours). Cosmoline
resists gas corrosion more than lighter oil.
c
. Cover gun with a waterproof cover, if practicable.
d
. As soon as possible after a gas attack, wash all of the parts of the gun in the
neutralizing solution issued for the purpose, or in its absence boiling water containing
soda. Dry them and then cover them with a light coat of oil.
e
. Remove all traces of gas from the ammunition with the neutralizing solution
issued for the purpose, then dry thoroughly.
■26. P
OINT TO BE OBSERVED BEFORE, DURING AND AFTER FIRING. — The following list
of points to be observed before, during, and after firing will be found useful as a guide
for the proper care of the gun. It will also serve as a guide for inspection.
Before During
During
temporary
cessation
After
Bore Look through and
clean
Clean bore Clean and
lightly oil bore
with a patch.
Moving Parts Oil and test for
worn or broken
parts. See that
parts function
without excessive
friction
Keep oiled Inspect and
oil; clean dirt
from belt
holding pawl.
Remove bolt,
lock frame,
barrel
extension, and
barrel. Clean,
oil, and release
firing pin.
Head Space Make correct
adjustment and
test (note, par.
11). Examine
barrel locking
spring
Tighten if
several
separated
cases occur.
Test Adjust
correctly and
test. Examine
barrel locking
spring.
Rear sight
and wind
gage
Clean and free
from grease. See
that sight is in
good mechanical
condition. Set
sight at 500 and
wind gage at zero
Keep properly
set
Keep
properly set
Clean and oil.
Set sight at 500
and wind gage
at zero.
