PS Magazine - TB 43-PS-670

PS, The Preventative Maintenance Monthly

ISSUE 670

SEPTEMBER 2008
PS Magazine - TB 43-PS-670 - Page 3 of 33
2
PS 670
SEP 08
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PS 670
SEP 08
I
Startup
Gravity drains oil out of the turbocharger when the Stryker’s been sitting for a
while. So make sure you idle the vehicle for 30 seconds or so before moving out. And
don’t
rev the engine while you’re waiting!
Idling lets enough oil circulate to the turbocharger’s bearings to prevent
any damage.
Shutdown
The turbocharger continues to spin for a short time after shutdown. Of course the
oil stops circulating as soon as you shut off the engine. That means you need to cool
down the turbocharger
before
shutting down the engine.
Run the engine at low idle for at least three minutes before shutdown.
The circulating oil cools the turbocharger and lubes the bearings so there’s no
overheating after the engine is shut down.
I
n cold weather, the recoil can slow way down for the main gun on your M1-series tank.
The colder it gets, the slower the recoil.
That’s why the breech has an adjustable operating cam. When the temperature
plummets, you can adjust the cam so the breech opens and ejects the stub bases faster.
Unfortunately, some crewmen are adjusting the cam to operate the breech as fast as it
can even during warm weather. They Fgure the faster the stub bases eject, the faster they
can reload and Fre again.
But setting the cam to the ± (fast) setting doesn’t speed up the recoil. It just forces
the stub base to be ejected more aggressively. That causes extra stress and wear on the
breech components and can lead to premature failure.
So, check the cam in your
tank now. The normal operating
position is one tooth towards
± from the S (slow) position.
Then, adjust the cam only if
it becomes necessary—when
the stub bases eject too slowly
because of cold weather.
You’ll Fnd the instructions for adjusting the cam starting on Page 3-266 of TM 9-2350-
264-10-2, Page 3-160 of TM 9-2350-288-10-2, and Page 3-188 of TM 9-2350-388-10-2.
And don’t forget to return the cam to its normal setting when that cold snap ends.
Cam Setting
Makes a Difference
Stryker…
Turbocharged PM
M1-Series Tanks…
Cam Setting
Makes a Difference
Normal
setting is
one tooth
towards
F from S
position
nobody can fire
a tank faster
than me!
hold on,
quick draw!
if you keep damaging
my breech, you’ll be
firing blanks!
drivers, the
stryker is a rugged
vehicle—as long as
you treat it right.
that means you
have to start it up
and shut it down
the right way.
if you don’t,
you’ll soon
be asking your
mechanic to
replace the
turbocharger.
hurry up
guys!
we’ve got a
rush mission!
That doesn’t mean you
can rush through my
startup procedures!
670.02-03.indd
1-2
7/31/08
3:48:59 PM
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