PS Magazine - TB 43-PS-612
PS, The Preventative Maintenance Monthly
ISSUE 612
NOVEMBER 2003
M56/M58
Add 2 ounces of icing inhibitor,
NSN 6850-01-377-5075, to every 5
gallons of turbine fuel to prevent ice
forming in the fuel. JP-8 already con-
tains icing inhibitor and doesn't need
treatment.
How you mix fog oil and turbine fuel
to prevent freezing depends on how the
visual pump is calibrated. If it's cali-
brated normally, use a fog oil/turbine
fuel mix of 100/0 for 0° F and above
and a mix of 80/20 for -25 to 0. If it's
calibrated to maximum, the fog oil/tur-
bine fuel mix should be 100/0 for -25 to
0 and 90/10 for -25 to -10. Below -10,
90/10 will yield better smoking.
When it's below 0, you also need to set the ejector air gap for 1 3/8.
PS 612
25
M157A2 Smoke Generator…
Smoking Just Got Better
Dear Editor,
Through years of working with the M157A2 smoke generator, we've come
up with some sure fire tips for better smoking. Believe me, we've found
these suggestions will save operators and repairmen lots of trouble.
•
If the smoke generator
suddenly shuts down or
great clouds of smoke
come out the engine head
opening, make the flutter
valve your first check.
Usually the valve has
slipped or the nut holding
the valve in place is
loose. Reposition the
valve and tighten the nut
and see if that helps. A
good PMCS check is to
eyeball the grooves in the
head that help hold the
valve in place. If they're
worn, you probably need
a new head. The valve will
not stay in place.
PS 612
NOV 03
24
they
deserve your
attention.
Grooves
badly
worn?
Valve slipped
or nut loose?
hey m15
7
smokers!
these guys have
come up with some
good ideas for
better smoking!
Nut
Valve
After setting the PREHEAT, hold the FUEL switch in START until the FUEL indicator comes
on. Release the FUEL switch and let it flip to RUN.
After the AIR indicator lights
and the PREHEAT indicator goes
off, hold the ENGINE switch in
START for 1 to 2 seconds and
then release it. Wait 3 seconds.
Hold the ENGINE switch in
START until the ENGINE indica-
tor lights and the SMOKE TEMP
indicator reaches the green
band. Release the ENGINE
switch and let it flip to RUN.
Wait until the engine temper-
ature reaches 800° F. Hold the
FOG OIL switch in START until
the FOG OIL indicator lights,
then let the switch flip to RUN.
You're ready to smoke.
For more information, see Pages 2-29 through 2-34 in TM 3-1040-283-10.
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