PS Magazine - TB 43-PS-679
PS, The Preventative Maintenance Monthly
ISSUE 679
JUNE 2009
5
PS 679
JUN 09
Crewmen
Using the -10 TM’s PMCS charts,
inspect the fnal drives weekly For oil leaks,
especially at the drain and check plugs.
Report any leaks to your mechanic.
While you’re at it, take a quick look at
the fnal drive fller cap. Dirt, oil and sand
can clog the vent hole on each oF the fller
caps. When that happens, pressure can
build until the fnal drive seal ruptures.
Having charging problems with an M88A1,
mechanics? The problem could be the generator.
Then again, maybe it isn’t.
Before you go through the lengthy trouble-
shooting procedures in TM 9-2350-256-20-1, take
a quick look at the voltage regulator.
You may not realize that the voltage regulator
has a reset button. Many times, just pressing the
reset button will solve those charging problems.
So give it a try. Then if the charging problems
persist, start troubleshooting!
Mechanics
AFter checking the fnal drive oil
levels
during
semiannual
services,
make sure you use the right torque when
replacing the drain and check plugs.
Although both plugs look the same,
they don’t take the same torque. The
check plug is tightened to 40-50 lb-Ft,
but the drain plug can’t take that kind oF
pressure. It either cracks—and leaks—
or shears oFF altogether.
Make sure you torque the drain plug
to 120-180
lb-in
. Yes, that’s pound-inch!
You’ll fnd the step-by-step instructions
in the -20-1-4 TMs.
IF you’re in Southwest Asia, you may
need to check the fller cap more oFten—
like aFter every mission.
Final Drive CheCks
M1-Series Tanks…
A Plug for
Final Drive CheCks
M88A1 Recovery Vehicle…
keeping
enough oil in
your m1-series
tank’s final
drives should
be a
high
priority.
after all, dry
final drives
will seize and
lock up the
transmission.
that means
big bucks for
repairs!
keeping them
full takes a
team effort
from crewmen
and
mechanics.
Charging
problems?
Try pressing
voltage
regulator
reset button
Torque check plug to 40-50 lb-ft…
…and drain plug to 120-180 lb-in
Keep vent hole free of dirt, oil and sand
an oil
leak?
how did
that
happen?
whaddya
expect?
you over-
torqueD my
final drive
drain plug!
Give my
Reset
Button
a Shot!
679.04-05.indd
1-2
4/24/09
5:38:59 PM
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