PS Magazine - TB 43-PS-672
PS, The Preventative Maintenance Monthly
ISSUE 672
NOVEMBER 2008
6
PS 672
NOV 08
7
PS 672
NOV 08
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 position. Then, move the handles to the up position when the engine
reaches operating temperature.
T
he adhesive that holds the two cushioning pads, NSN 5340-01-079-3031, on each
side of your tank’s knee switch actuator sometimes wears out. When that happens,
the pads fall off.
Not a big deal, you think? Well, those pads
do
have an important job. They keep the manual
control lever from activating the switch and
opening the ammo doors until the loader presses
against the lever.
So keep a close eye on the pads. If they start
to loosen, apply new adhesive, NSN 8040-00-
880-7332, to keep ‘em in place. Use dry cleaning
solvent, NSN 6850-00-285-8011, to clean the old
adhesive off the actuator bracket Frst. That allows
the pads to adhere tightly.
Remember, though, that 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.
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.
M109-Series SP Howitzers…
Set Air
Cleaner
for
‘
Winter’
M1-Series Tanks…
Keep Pads in Place
Use adhesive to keep pads in place
hey,
whatcha
got
there?
it’s just
some
adhesive.
I noticed
that your
knee switch
actuator
pads were
a little
loose!
how come you’re not
freezing like me?
‘cause they
remembered to move
my air cleaner handles
to the winter position!
Pull locking
handles
up
in summer…
…and
retract
in
winter
Check air
cleaner
indicator
672.06-07.indd
1-2
9/29/08
5:00:02 PM
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