PS Magazine - TB 43-PS-604
PS, The Preventative Maintenance Monthly
ISSUE 604
MARCH 2003
PS 604
MAR 03
5
PS 604
MAR 03
4
M1-Series Tanks…
Dear Editor,
When in the field, mud and dirt buildup on your tank is a foregone
conclusion. But when it builds up around the final drive filler caps,
you’ve got a problem.
Dirt clogs the vent hole
on each of the filler caps.
When that happens, pres-
sure can build until the
final drive seal ruptures.
To protect our tanks,
we’ve started checking
the final drive filler caps
at the end of a mission.
Unclogged vents make for
a healthy final drive.
1LT Justin Fregia
1/3d ACR
Ft Carson, CO
That’s an idea we don’t mind plugging!
T
he mine clearing blade on an M1-series tank won’t be clearing much of anything
if the lifting mechanism, NSN 2590-01-277-0060, isn’t working, mechanics.
But before your unit pays more than $7,000 for a new lifting mechanism, con-
sider this: Every part is replaceable. You’ll find them listed in Fig C-3 of TM 9-
2590-509-23&P.
The number-one lifting mechanism problem is loose electrical brushes in the
motors. That’s especially true if the operator does a lot of “combat drops” or
changes the motors’ direction without first letting the mine blade come to a com-
plete stop. Reinstalling the brushes usually fixes the problem.
If not, the brushes may be burned
out. Install new brushes, NSN
5977-01-412-0758. You’ll need
four brushes for each motor.
If one of the motors, NSN 6105-
01-277-0295, still won’t work, you
may need to replace it. At around
$3,500, that’s still a lot cheaper than
ordering a new lifting mechanism.
whew!
what a
day!
let’s get
cleaned up
and grab
some chow!
hey!
I’m dirty,
too!
how ‘bout cleaning
my final drive filler
caps before you go?
It’s
no
use!!
my mine
clearing
blade just
won’t
lift!
hmm… could
be loose
brushes in
the motors.
Check for
loose brushes
inside motor
From the desk of the
Editor
Keep vent hole
free of dirt
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