PS Magazine - TB 43-PS-616
PS, The Preventative Maintenance Monthly
ISSUE 616
MARCH 2004
M
echanics, when you get a newly repaired engine or generator for your M113-
series vehicle, what do you do with the unserviceable one?
When unserviceable items aren’t turned in, the depot runs out of stuff to repair.
Pretty soon, the supply system dries up.
The following items are particularly needed for turn-in to Anniston Army Depot
(BA4) for repair:
PS 616
MAR 04
9
M109-Series SP Howitzers…
Give Carbon the Boot
C
rewmen, keeping the muzzle brake and bore evacuator free of carbon is one
secret to straight shooting with your M109-series SP howitzer.
Each time the cannon is fired, a little carbon builds up inside. Wait too long for a
cleaning and enough accumulates to freeze the two parts in place. They become
almost impossible to remove.
Avoid that sticky problem by removing, cleaning, and greasing the muzzle brake
quarterly or after every 300 rounds fired. The bore evacuator should be cleaned after
firing and monthly if not fired.
1.
Eyeball the muzzle brake for cracks. If you spot one
longer than one inch, you need a new muzzle brake.
2.
Remove the muzzle brake and bore evacuator follow-
ing the instructions starting on Page 3-53 of TM 9-2350-
311-10 and Page 3-97 of TM 9-2350-314-10. The muz-
zle brake weighs about 350 pounds and the bore evacu-
ator is no lightweight, either, so always use the proper
lifting equipment.
3.
Lay the parts on a clean dropcloth to prevent contam-
ination by dirt and sand.
4.
Thoroughly spray all the carbon-coated surfaces of
the muzzle brake and bore evacuator with CLP, NSN
9150-01-054-6453. Let the CLP soak for a few minutes,
then scrub until all the carbon is removed. Use the bore
evacuator brush from the cleaning and preservative
artillery kit, NSN 1025-01-196-2172, and some clean
rags. You can also substitute bore evacuator brush, NSN
1005-00-903-1296, for scrubbing.
5.
Lightly coat the muzzle brake threads with general
purpose grease, NSN 9150-00-754-2595. Then, lightly
lube the inside, valve balls, valve ring and all unpainted
surfaces on the bore evacuator.
6.
Reassemble the muzzle brake and bore evacuator fol-
lowing the instructions in the operator’s manuals.
Item
Vehicle
Engine w/container
Engine w/container
Generator, engine AC
Generator, engine AC
Final drive assembly
M113A3 FOV
M113A3 FOV
M113 FOV
M113A3 FOV
M113/A2/A3 FOV
Part Number
5705597
57K1006
A0012260AB
A0012266AA
12253512
NSN
M113-series FOV…
Here’s
how to
give that
carbon
buildup
the
boot…
looks like I have
all the tools I
need to clean this
muzzle brake and
bore evacuator.
add a lot
of elbow
grease and
you’re
all
set!
I guess we
should turn in
a few of those
unserviceable
ones we’ve
been holding.
there aren’t any
available in the
supply system.
my requisition for
a new carrier engine
was rejected.
616. 08-09 (C)
1/26/04
12:18 PM
Page 1
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