PS Magazine - TB 43-PS-565
PS, The Preventative Maintenance Monthly
ISSUE 565
DECEMBER 1999
PS 565
41
DEC 99
PS 565
40
DEC 99
If the AIR indicator goes out and the
engine won’t start, release the ENGINE
switch.
Wait until
the AIR
indicator
comes on
again and
then try to
re-start the
engine.
Completely
drain the
air tank
after operations. That prevents mois-
ture from collecting in the air lines and
pressure tank.
Using a wrench on the fog oil strainer
cap screws tears the strainers’ O-rings
and can even damage the strainers.
Then you get leaks and low fog oil
Successful starting and stopping
Wait for the AIR light to come on
before you turn on the engine. Other-
wise, you’ll have starting or purging
problems.
Hold the FUEL switch up—you can’t
flick it up—until the fuel indicator
lights. But don’t hold it up longer than
30 seconds. Holding it longer can dam-
age the fuel pump.
Your M157 may need a little extra
fuel and air in cold weather after sit-
ting all night. So, hold the ENGINE
switch in START for one to two sec-
onds and then release it before it starts.
Wait three seconds and hold the EN-
GINE switch in START again. After
the engine is running, release the switch
to RUN.
Screw in strainers
hand-tight
pressure. Screw
in the strainers’
caps by hand.
When a cap feels
tight, stop.
Wait for AIR light to come
on before starting engine
Turn off the FOG OIL switch before
turning off the ENGINE switch to let
excess fog oil burn off. Let the engine
heat up to 1,000
°
F
to burn off excess
fog oil.
If fog oil
collects in
the engine
chamber,
the M157
won’t start
and the fog
oil must be
dumped out
manually.
Line up lugs
and tighten
head
1
/
4
inch
Take it easy
Hand-tight is tight enough for the
engine head and the fog oil strainer
cap screws. If you muscle the engine
head tighter, you damage the head gas-
ket, head, and combustion chamber
flanges. That causes a poor seal with
the combustion chamber and poor
smoking.
Line up the head so that the lugs in
the head fit into the cutouts of the com-
bustion chamber. Tighten the head
1
/
4
inch—and stop.
Hold FUEL switch no
longer than 30 seconds
In cold weather, release
ENGINE switch if AIR
light goes out
Hit air pressure drain
valve after operations
Turn
off
FOG OIL
switch
before
turning
off
ENGINE
switch
Smoking
can be
easy
for
you and your M157
smoke generator
if you just practice
a little smoking
etiquette.
M157/M157A2 Smoke Generator . . .
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