PS Magazine - TB 43-PS-588
PS, The Preventative Maintenance Monthly
ISSUE 588
NOVEMBER 2001
PS 588
NOV 01
16
locate the leaky transfer
w
hile you’re doing PMCS on your M113-series vehicle, take a quick look at the
transfer gearcase for leaks.
It seems that some new gearcase seals aren’t getting any sealant when they’re first
installed. It doesn’t take long for those gearcases to leak, so pretty soon you’re pay-
ing for a new gearcase.
So be alert for leaks. If you spot
one, let your DS know right away.
And make sure they add a bead of
sealant, NSN 8030-00-291-1789,
around the outside circumference
of the seal’s metal frame where it
touches the gearcase housing.
M113-Series FOV…
Cover Connection’s Critical
W
hen it’s time to bolt the hull access cover, NSN 5340-00-759-5409, onto an
M113-series vehicle, are you one of those mechanics who grabs whatever hard-
ware’s handy?
If so, that vehicle may soon be included on your unit’s NMC list.
The problem comes when you use a bolt that’s 2 inches long or longer. That bolt
will hit the transmission oil pan. Eventually, it rubs a hole in the pan.
When the transmission loses
enough oil, the clutches burn up and
you’re left with a vehicle that’s
going nowhere.
So make sure you use only the
1
1
∕
4
-in bolts, NSN 5305-00-719-
5219, that are called out in Fig 208
of TM 9-2350-261- 24P and Fig 190
of TM 9-2350-277-24P. They hold
the access cover in place without
damaging the transmission oil pan.
[ouch!]
I think
you used
wrong-sized
bolts!
And
don’t
forget
to
include flat
washers, NSN
5310-00-809-
5998, when
you use the
right bolts.
AHHH…
much
better!
Wrong bolt digs
hole in oil pan
even if my
engine panel
is
leaking
,
I’m still fmc!
I haven’t
found
any leaks
yet!
you’d
better take
a look at my
transfer
gearcase
next!
Feel for
transfer
gearcase
leaks
P
age 21 of PS 585 said that exhaust
fan on the M113A2 family of vehicles
blows air
into
the engine compart-
ment. Since that would allow harmful
exhaust gases to seep into the crew
compartment, the article said vehicles
with a leaky engine compartment
access panel were NMC.
That’s not true. The exhaust fans on
both the A2 and A3 family pull air
out
of the engine compartment. Both mod-
els remain FMC with failed seals, but
you should still replace bad seals as
soon as possible to avoid problems
with engine cooling.
me,
too!
588. 16-17 (C)
9/29/01
4:47 PM
Page 1
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