PS Magazine - TB 43-PS-731

PS, The Preventative Maintenance Monthly

ISSUE 731

OCTOBER 2013
PS Magazine - TB 43-PS-731 - Page 5 of 33
7
6
PS 731
OCT 13
OCT 13
PS 731
T
he inertial navigation unit
(INU) is a reliable, ring-laser
gyroscope
that
provides
constant,
upgraded
grid
coordinate information for
your vehicle’s location and
targeting missions.
And at $60K a pop, it’s
also very expensive!
So when you pack the
INU for shipment, make sure
you use its reusable shipping
container,
NSN
8145-01-
502-2474.
That
container
includes
a
metal
shock
isolation tray that protects
the INU from damage.
If you have to use another container, the INU
must
be surrounded by at least 4-5 inches of high-
density polyurethane foam.
brings a sheet of
foam measuring
108 x 24 x 2 inches.
The foam will secure
and cushion the
INU so it’ll
arrive at its
destination
undamaged.
Dear Editor,
In our work supporting Ft Carson’s Bradleys, we keep running into Soldiers
who go by the two-finger rule for measuring track tension. That’s just plain
wrong. If you measure with two fingers, you’ll get the wrong track tension and
track that wears out too fast.
Measure with a pencil, not your fingers. After every operation, let the
Bradley coast forward to a complete stop on firm, level ground. Stop the
engine and try turning the rear support roller with one hand. The roller should
turn freely, but with only enough room between the track and roller for a
pencil to pass through.
If there’s more room than
that, the track is too tight.
If the roller won’t turn at
all, the track is too loose.
Dave Whithee
Mike Wood
Bradley Field Support
Ft Carson, CO
Editor’s note:
If you need a refresher on how to tighten or loosen track, see
Page 5 in PS 661 (Dec 07). You can Fnd it online at:
I’ve got
all I
need
to measure
track tension
right here!
Not two
fingers,
Soldier.
Here’s
what you
need to
check
track
tension.
M1200 Armored Knight, M707 Knight w/FS3, M7 BFIST and M2A3/M3A3 Bradley…
INU N
eeds
P
roper
P
ackaging
H
EY!
this
can’t
be
the right way
to package and
ship an INU!
Use pencil
(not
your
finger)
to check
space
between
rear
support
roller and
track
M2/M3-Series Bradley…
Use a
Pencil,
No
t
Your
Fingers!
731 06-07.indd
1-2
8/23/13
1:23 PM
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