PS Magazine - TB 43-PS-570
PS, The Preventative Maintenance Monthly
ISSUE 570
MAY 2000
PS 570
47
MAY 00
PS 570
46
MAY 00
hese bits of advice will help your
M12A1 decon start and stop and help
you breathe.
The pump starter burns up fast if
you let it turn and turn longer than 10
seconds. If the pump doesn’t start, wait
three minutes to let it cool down be-
fore you try again. After five tries with-
out success, call your repairman.
The M12’s exhaust can make you
sick. That’s why you need to vent the
exhaust away with flexible exhaust
extensions, NSN 2990-00-994-0827.
Until they come in, a good substitute
is the 1
3
/
4
-in diameter extension used
in most truck motor pools.
As soon as the engine catches, re-
lease the starter but keep the OIL
PRESSURE SWITCH pushed in until
the oil pressure exceeds 20 psi.
Before you shut down the engine,
let it idle for 10–15 minutes at 500–
600 rpm to let it cool off. Then turn off
the FUEL-SHUT OFF valve before
you turn the starter switch to STOP.
Otherwise, fuel will run into the car-
buretor. The next time you crank the
engine, it may not start and could even
backfire, which is dangerous.
One other tip: Give the flywheel pul-
ley a wide berth, especially when
you’re wearing protective clothing. The
pulley turns at 3,800 rpm. If it catches
your pants leg, it’ll rip the fabric and
then your chemical protection is gone.
pardon me,
but you should have
used
exhaust extensions
if you didn't want to
breath exhaust.
here
you go!
this
ought
to help.
Don't turn starter for more than 10
seconds. Hold OIL PRESSURE SWITCH
until pressure is more than 20 psi
Turn off fuel before turning off engine
Use extension to keep
exhaust away from you
Stay away from pulley
What's
that
smell
?
M12A1 Decon . . .
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