PS Magazine - TB 43-PS-612
PS, The Preventative Maintenance Monthly
ISSUE 612
NOVEMBER 2003
W
hen the bottom drops out on the thermometer
this winter, make sure your howitzer’s air clean-
ers are set for the season.
The air cleaner locking handles need to be
pulled up and hooked in place when the tempera-
ture is below 25°F. If you leave ‘em down, the air
is too cold and your engine won’t run properly.
Personnel Heaters…
RDD
Saves
the Day
I
n some combat vehicles, the digital readout
located on top of the new A-20 personnel
heater’s doghouse is blocked from view. If you
can’t see the readout, you won’t know when the
heater has a component failure, error or fault.
The solution is a remote diagnostics display
(RDD) for the heater.
The RDD can be mounted
to a more accessible part of the heater with
screws, nuts and bolts, or a hook-and-pile fas-
tening system.
The RDD costs $377.49 and provides direct
upload and download capability from a personal
computer for troubleshooting. It meets the same
electromagnetic interference and vibration
requirements as the heater itself.
The RDD part number is 5000-30317. Order
it from:
Hunter Manufacturing Co
ATTN: John Kennedy
30525 Aurora Road
Solon, OH 44139-2795
Installation instructions come with the RDD.
PS 612
NOV 03
14
M109-Series SP Howitzers…
Air Cleaner
Up
s
&
Down
s
when you can’t
see the heater
display,
I’m
here
to save the day!!
For intermediate temperatures (25-
40°F), start the engine with the locking
handles in the winter position. Then,
move the handles to the down position
when the engine reaches operating
temperature.
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.
Check air
cleaner
indicator
Remember, though, that when tem-
peratures climb above 40°F, you must
put the handles in the down position.
Leaving the handles up in the winter
position during the summer will over-
heat your engine and maybe burn up
some valves.
Pull locking
handles
up
in
winter…
…and
retract
in
summer
brrr!
I sure wish they’d
remembered to RAiSE
my engine air cleaner
locking handles!
Air Cleaner
Up
s
&
Down
s
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