PS Magazine - TB 43-PS-566
PS, The Preventative Maintenance Monthly
ISSUE 566
JANUARY 2000
NBC Protective Masks . . .
No Polish Please
M17-Series Decon . . .
S
tay away from plastic polish, NBC NCOs.
Several of the M40 and M42 TMs list plastic polish, NSN 7930-00-935-3794,
for repairing eyelens and outserts scratches. But the polish can scratch lenses, so
you shouldn’t use it.
Optical cleaning compound, NSN 6850-00-592-3283, is the only thing that
should be used on lenses. It can be found in the M40/M42- series unit mainte-
nance -20&P technical manuals.
If you want to avoid scratched lenses, make sure that outserts are on the masks
before they leave the NBC room and that everyone in your unit leaves them on.
When you put the belts back on,
make sure they’re tight. If there’s more
than
1
/
4
inch of play, tell your repair-
man. He can adjust them like it says
on Page 2-31 in the -23&P or replace
both belts if necessary.
More than
1
/
4
-inch of play?
Never let the water pump run more
than 1 minute without water. That
cooks the pump.
Storage
If your M17 is going to sit in the
motor pool for more than a few days,
take off the water and fuel pump belts
and store them in the M17 toolbox.
You can just rotate the belts on and off
the belt pulleys. If they’re left on, they
stretch and dry rot.
Remove belts for storage
Shutdown
When you’re through deconning,
drain as much water out of the M17 as
you can. Water left in the M17 leads to
corrosion, which locks up the water
Push
throttle to
MAX for
35-40
seconds,
then back
on idle
Hoses
Don’t let the hose connectors drag
on the ground. That breaks the quick-
disconnects and the hoses can’t be se-
cured to the M17. Hold the hose by
both connectors to drag it.
Check
outlet
valve
after
every
mission
pump and causes leaks. To get out the
water, run the engine up to MAX for
35–40 seconds and then throttle down
to idle.
Drag hose by both connectors
deconning
can be
delightful
with
pm
!
econning with your M17 may not
actually be delightful with this PM, but
it will certainly be easier.
Descaling
Page 2-16 in TM 3-4230-228-10 says
to check the outlet assembly of the heat
exchanger coil for scaling during
PMCS. If the scale buildup reaches
1
/
16
inch or more, your repairman can
do the descaling procedure that begins
on Page 2-82 of TM 3-4230-228-23&P.
Otherwise, the burner will take forever
to heat water.
PS 566
52
JAN 00
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