PS Magazine - TB 43-PS-710

PS, The Preventative Maintenance Monthly

ISSUE 710

JANUARY 2012
PS Magazine - TB 43-PS-710 - Page 5 of 33
6
PS 710
JAN 12
W
hen the bottom drops out of the thermometer this winter, make sure your
howitzer’s air cleaners are set for the season.
The air cleaner locking handles need to be down and locked in their holders when
the temperature is below 25°F.
If you extend ‘em, the air is too cold and your engine
won’t run properly.
For intermediate temperatures (25-40°F), start the engine with the locking handles
in the winter (down) position.
Then, move the handles to the summer (up) position
when the engine reaches operating temperature.
Remember, when temperatures climb above 40°F, you must put the handles in
the up, extended position.
Leaving the handles down during warm winter days—
and especially during the summer—will overheat your engine and maybe burn up
some valves.
± If±you±hear±that±sound±when±closing±the±breech±
on± your± M109A6± Paladin,± chances± are± the± breech±
control±cam±has±fallen±off,±crewmen.
± The±cam±is±held±in±place±with±two±screws.±The±
constant± stress± of± closing± the± breech,± especially±
during±live±fire,±loosens±the±screws±and±allows±the±
cam±to±break±or±fall±off.±That’s±why±it’s±important±to±
make±sure±the±screws±are±installed±properly.
± Take± a± quick± look± at± the± screw± heads.± There±
should±be±two±stake±marks±on±each±screw±head.±If±
you±don’t±see±the±stake±marks,±the±screws±will±come±
loose.±Ask±your±mechanic±to±stake±them±properly.±
He’ll±follow±the±procedures±on±Page±4-108±of±TM±
9-2350-314-34-2±(Feb±99,±w/Ch±4,±Apr±08).
M109-Series SP Howitzers…
Air Cleaner
Ups
and
Downs
M109A6±Paladin…
Don’t Put Cam Screws at Stake!
While you’re at it, take
a close look at the air
cleaner indicator.
if the indicator reads 25-in
H
2
O or
higher,
the air cleaner
element
needs
to be serviced.
A reading of
less
than 25-in
H
2
O is
OK.
uh-oh!
that
doesn’t
sound
good!
No stake marks on screws? Call your mechanics
I wouldn’t
be in this
shape if you’d
remembered to
raise my engine
air cleaner
locking handles!
what’s
he saying
in there?
Pull locking
handles
up
in summer…
…and
down
in
winter
Check air
cleaner
indicator
710 06-07.indd
1-2
12/6/11
1:59 PM
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