PS Magazine - TB 43-PS-596
PS, The Preventative Maintenance Monthly
ISSUE 596
JULY 2002
PS 596
JULY 02
14
M109-Series SP Howitzers, M992A2 Ammo Carrier…
Air Box Needs a Blowout
I
f it has been a while since you’ve cleaned the air cleaner boxes in your howitzer
or ammo carrier, they need your attention now.
That’s because dust and grit collect all over the boxes even under normal condi-
tions. During the heat and dust of summer, things just get that much worse. The air
induction system exhaust fans just can’t remove all the dust and grit.
So, next time you pull the air filters for cleaning, clean the air boxes, too.
boy, am I glad
that exercise
is over! I’ve
got a
week’s
worth of dirt
to clean off!
hey, don’t
forget about
me! my
air
box
is pretty
dirty, too!
You have to
remove
the
blower motor
hose bracket to
get to the plugs
on the Paladin’s
left air box.
First, brush
off any dirt
on the panel
under the air
filter.
Next, open the two
plugs at the base of
each air box and
blow out all the dirt
and sand with low-
pressure air
-no
more than 30 psi.
If the dirt and sand have hardened—which is what happens when water gets
mixed in—you’ll probably have to break up the mess with a knife or screwdriver
before blowing it out.
Never
clean the boxes by hosing them out with water. That leads to rust, which
causes even more clogging problems.
Brush dirt and
sand from panel
Remove plugs and blow
out sand and dirt
Remove bracket
from Paladin air box
f
T
ake another look at the homemade tool on Pages 20-21 of PS 586 (Sep 01). The
tool, which measures the recuperator guide pins on your M109-series SP howitzer,
shows the minimum length
of the guide pins as
1
∕
8
inch.
That’s wrong. Change 3
(Jan 00) to TM 9-2350-311-
10 and Change 1 (Apr 01)
to TM 9-2350-314-10 mod-
ified the minimum length to
1
∕
4
inch. If you’ve already
made the tool, just shave off
another
1
∕
8
inch.
M109
howitzer
tool
revisited
596. 14-15 (C)
6/2/02
1:24 PM
Page 1
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