PS Magazine - TB 43-PS-624
PS, The Preventative Maintenance Monthly
ISSUE 624
NOVEMBER 2004
PS 624
NOV 04
9
M109A6 Paladin…
A Real Time Saver
B
efore you remove the AFCS computer unit (ACU) for repairs, mechanics, write
down the offset data. It only takes a couple of minutes and it’ll save you a whole
bunch of minutes later.
The offset data is needed to synchronize
the ACU with the gun. Without the data,
you’ll have to do a complete fire control
alignment test—
a 3- to 4-hour project—
after
a new ACU is installed.
Retrieve the offset data by going into
maintenance mode and checking the bore-
sight entry. There you’ll find the roll offset,
elevation offset and azimuth offset figures.
Use a grease pencil to write the figures
down on the back of the display unit. That
way, the numbers will be handy for entering
into the new ACU.
PS 624
NOV 04
8
AVLB…
c
rewmen, when it’s time to pull the
back deck on your AVLB, you can avoid
a geyser of hydraulic fluid by remem-
bering to disconnect the two hydraulic
lines from the holddown manifold.
Just because you remembered to dis-
connect the lines doesn’t mean you’re
out of the woods yet, either. Trying to
move the AVLB under power will force
hydraulic fluid out of the open hold-
down manifold. Prevent that mistake by
plugging the holddown manifold with
tube caps, NSN 4730-00-647-3311.
Then, remember to remove the caps
and reattach the lines when putting the
back deck in place.
Forget to follow the TM procedures
and the deck will disconnect them for
you—the hard way. Then you’ll have to
explain a massive hydraulic spill to the
environmental folks.
I
told
you
to cap that
holddown
manifold!
Disconnect these hoses
before removing deck
Cap manifold after removing hoses
Write offset data on
back of display unit
ok, time to
get that
defective acu
replaced.
don’t forget
to write down
the offset
data first!
The offset data should also be
entered in the AEPS electronic
DA Form 2408-4 gun card system
as a non-firing MIS REMARKS
entry. That way, if the data on the
back of the display unit gets
erased or smeared, you still have
the info handy.
write the data
legibly!
it
might not be
you who has to
read it later.
624.08-09(C)
9/23/04
3:56 PM
Page 1
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