PS Magazine - TB 43-PS-616
PS, The Preventative Maintenance Monthly
ISSUE 616
MARCH 2004
T
here is one and only one machine gun mount kit that can be used on the M939-
series truck: machine gun mount kit, NSN 1005-01-432-3339, which is a 4-post
lightweight weapon station. To mount the weapon station, you must also install the
cab reinforcement kit, NSN 2590-01-436-9144, to prevent damage to the cab.
The only machine gun
mounts that can be used with
the lightweight weapon sta-
tion are the MK93 Mod 1,
NSN
which is covered by TM 9-
1005-245-13&P,
and the
MK64 Mod 9, NSN 1010-01-
412-3159, which is covered
by TM 9-1010-231-13&P.
Eventually, a new version of
TM 9-1005-245-13&P will
cover both mounts.
The only weapons safety certified to date for this weapon station are the MK 19,
M2, and M60 machine guns. It's important to use a catch bag with the mounts to pre-
vent spent casings and links from falling into the cab and possibly injuring the driver.
Some units have tried substituting the 3-post M66 mount that's used on most other
trucks. That's a bad mistake. The M66 mount can't be properly stabilized and secured
to the M939's platform. In as few as 100 miles on the road, the cab can suffer struc-
tural damage. This damage can become so severe that the cab can slide over the truck
frame or the mount can work loose during firing. Either situation could be fatal for
someone.
If you have installed M66s on your M939s, remove them ASAP and order the 4-
post ring mount and the cab reinforcement kit.
Direct support installs the weapons station and cab reinforcement kit. The weapons
ring comes with the mount kit. For parts info on the ring mount, see Fig 602 in TM 9-
2320-272-24P-2.
For additional info on the M939's mount, contact William Jensen at DSN 793-
3677/(309) 782-3677 or email:
jensenw@ria.army.mil
or Barbara Painter at DSN 793-
4403/(309) 782-4403 or email:
painterb@ria.army.mil
PS 616
MAR 04
16
M939-Series Trucks…
Use only
four-post
mount
we’re
the
only
machine
guns
you can
mount
on the
m939!
I need
a 4-post
mount!!
use the three-
post mount and
you’ll suffer the
consequences!
and so
will I!
get that 3-
poster
away
from me! it’ll
kill
my cab!
616. 16-17 (C)
1/22/04
4:41 PM
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