PS Magazine - TB 43-PS-732
PS, The Preventative Maintenance Monthly
ISSUE 732
NOVEMBER 2013
8
PS 732
NOV 13
9
PS 732
NOV 13
Some mechanics are using the
wrong
bolt,
NSN
5305-01-216-
7378. It’s supposed to be used for
attaching the output Fange to the
transmission. But this bolt is about
one
inch
too
long
for
securing
the prop shafts and U-joints, so it
damages the output housing on the
transmission. That can make your
vehicle NMC!
The right bolt, NSN 5305-01-424-8744, is just the right length for securing the
prop shaft and U-joints without damaging the output housing. Be sure to use the right
washer, NSN 5310-00-011-5730, too.
C
rewmen, springs that are too tight can be a bummer, especially if they happen to be
the closing springs on your Paladin’s breechblock.
The breech is heavy, so those springs are essential to helping you swing it shut. If
the springs wear out, closing the breechblock is no easy task.
A lot of crewmen keep the
springs
under
full
tension.
That lets the breechblock close
±rmly, but the constant pressure
wears out the springs and leads
to early failure. It can also close
the breechblock with enough
force
to
damage
its
detent
plunger and stop surface.
Apply
just
enough
pre-
load tension to the springs to
securely close the breechblock
at the loading elevation—less
than
300
mils.
That
usually
means adjusting the springs to
half-tension.
Just push in the plunger and rotate the spring adjuster clockwise to release
the tension. If the breechblock won’t close at loading elevation, return the springs to
full tension and tell your mechanic.
Use Just The Right Bolt
Use Just The Right Bolt
M113A3 FOV…
Use Just The Right Bolt
M109A6 Paladin…
Don’t Let Springs Cramp Your Style
mechanics, one
little
ol’ bolt might not seem
like such a
big
deal.
Prop shafts and U-joints
need correct bolts
Full
tension
is too
tight…
…so turn
spring
adjuster to
half-tension
what’s
wrong?
we gotta
go on a
mission!
somebody
used the
wrong
bolt and now
I’m
nmc!
well, another
mission done!
how about
loosening the tension
on my breechblock
closing springs
before
you leave?
hey…
but making sure you have
the
right
bolt is a
huge
deal when it comes to
installing the propeller
shaft and universal joints
on a vehicle from the
m113a3 family.
..
.w
ai
t
!
732 08-09.indd
1-2
9/23/13
3:01 PM
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