PS Magazine - TB 43-PS-728

PS, The Preventative Maintenance Monthly

ISSUE 728

JULY 2013
PS Magazine - TB 43-PS-728 - Page 23 of 33
42
PS 728
JUL 13
WARNING
LOADING AND FIRING HAZARDS
• Selector must be at S (safe) except when firing.
• Misalignment of safe detent position on firing selector will
cause a malfunction that may accidentally arm the mortar
and can result in unintentional discharge of round.
• Failure to comply may result in serious injury to personnel
and damage to equipment.
This is a characteristic of the M224/M224A1 and is not a cause for it to be
deadlined. But operators obviously must check during PMCS that the selector switch
aligns correctly with the S, D and T detents and stays in the selected mode during the
checks. See the PMCS in WP 0018-5 in TM 9-1010-223-10 (Oct 12) and WP 0021-5
in TM 9-1010-233-10 (Feb 11).
If there is any doubt, have your support check it out.
It’s also a good idea to check out the H&FM when it’s issued and before it’s used
for the ±rst time.
M224/M224A1 Mortar…
Careful Where You Put
Selector Switch
Machine Gun Mounts…
New Pin Assembly Available
The M224/M224A1 60mm mortar can fire
if
the
handle and firing mechanism (H&FM) selector
switch is placed between
S
(safe) and
D
(drop)
positions when the trigger is squeezed.
A
new pin assembly
is now available
for the universal pintle adapter and
the cantilever arm for MK93 MOD 1 and
2 and MK64 MOD 9 machine gun mounts.
in the field, make
sure you always
have the firing
selector set to the
correct
position.
The pin assembly, NSN 1010-
01-605-
7
322 (PN 13036435),
does away with the need for
a lanyard and a spring pin.
it replaces the pin and cable
assembly that came with NSN
5315-01-44
7
-2233 (PN 12012064).
The new pin assembly
can’t
be used
universal pintle adapter.
Continue to use
the old assembly
with it.
Order pin assembly with
Make sure selector aligns correctly
with three positions
The following updated warning
is being added to both TMs…
728 42-43.indd
1-2
6/3/13
10:40 AM
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