PS Magazine - TB 43-PS-599
PS, The Preventative Maintenance Monthly
ISSUE 599
OCTOBER 2002
PS 599
OCT 02
19
Dear Half-Mast,
What exactly do we use to mount our MK 19 machine guns on
our vehicles? The TMs for the MK 19 don't spell that out.
SGT D.B.
PS 599
OCT 02
18
Dear Editor,
We've found in our unit that a common cause of misfires for our
M240 machine guns is worn-out driving springs. Once a spring
strand breaks, the M240 fires one shot and then quits. But even
with a bad spring, the M240 passes a function test so you don't
find out you've got problems until you get to the field.
Those problems are avoided
if gunners eyeball the driving
spring when they clean their
M240s. Just look over the
spring for cracks or breaks,
especially in the top and bot-
tom 5 coils. That's where
breaks usually occur. Also
look for flat spots on the
outside of the spring. They're
a sign that the operating rod
is wearing out and the spring
is rubbing on the inside of the
bolt carrier.
If you find problems, tell your armorer. He will find the inspection cri-
teria for the springs in TM 9-1005-313-23&P.
CPT Mike Riedmuller
Co F, 2/3 ACR
Ft Carson, CO
Look for breaks and flat spots
on the driving spring
Dear Sergeant D.B.,
Actually, you have two choices. The MK 19 can be mounted on the MK64 MOD
9, NSN 1010-01-412-3159, and on the MK93 MOD 1, NSN 1005-01-383-2757.
The MK64 is also used with the M2 and M60 machine guns.
Check your vehicle's -20 TM to see which ring should be used with the mount.
Remember, mounts and the M66 ring
have their own TM, TM 9-1005-245-
13&P. The MK64 mount is covered by
TM 9-1010-231-13&P. They're the best
places to go for mount and ring info.
If you have mount and ring ques-
tions, contact TACOM's Barb Painter
at (309) 782-4403/DSN 793-4403 or
e-mail
painterb@ria.army.mil
If only I could
figure out a way
to get you two
together…
My driving
spring has
sprung.
why
didn’t you
fire?!
MK 19 Machine Gun…
MK93 mount
M240 Machine Gun…
no more
firing for
me!
599. 18-19 (C)
8/30/02
10:07 AM
Page 1
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