PS Magazine - TB 43-PS-637
PS, The Preventative Maintenance Monthly
ISSUE 637
DECEMBER 2005
i
t’s almost impossible to drain out all water from the M17 and M12A1 decons
no matter how careful you are. Then when the decons sit for weeks in the cold, that
water freezes and damages stuff like the tanks and pumps. They are expensive to
repair.
Shut the door to freezing like this:
Freeze protection is easier with the M17 because
you can just run antifreeze through it. Mix six gal-
lons of antifreeze, NSN 6810-01-181-7121, to
every four gallons of water and fill the M17’s tank
with the mixture. The procedure begins on Page
2-55 in TM 3-4230-228-10.
It’s not so simple with the M12 because you
can’t use antifreeze. Antifreeze mixes with bleach
and produces a toxic gas that can create enough
pressure in the tank to rupture seals and valves.
The solution is general purpose
lubricating oil (PL-S), NSN
9150-00-231-6689. Park the M12
on level ground and drain all the
water you can from the main
tank, prime detergent tank and
pump. Then mix three pints of oil
with three gallons of water. Pour
the mixture into the detergent
tank and open Valve 4. Run the
pump 30 seconds, then drain the
pump. Close Valve 4, but leave
the pump drain valve open. Now
the pump won’t freeze.
Drain tanks and pump
PS 637
27
PS 637
DEC 05
26
M17-Series Decon,
M12A1 Decon…
stop
mr.
cold!
Mix 6 gallons
of antifreeze
to every 4
gallons of
water
Pour water/oil mixture
in detergent tank…
and open Valve 4
you’ll get
nowhere messing
with us
now…
we’re
protected!
…while visions of
sugar plums…
turned into
dread!
noooo!
it caaan’t
beeeee……
meeee?
yes,
you,
half-
mast!
T
was the night
before christmas…
no creature was
stirring…
all were abed…
M17
M12
637.26-27(C).qxd
10/31/05
8:22 PM
Page 1
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