PS Magazine - TB 43-PS-558
PS, The Preventative Maintenance Monthly
ISSUE 558
MAY 1999
Check
center
guide
width
three
inches
from
bottom
Finding the Right Fan
MLRS . . .
You’re right on track with that tool! Good job!
Shoes: Try to insert the
5
/
16
-in
side of the tool between track
shoes. If the tool won’t fit, the
shoes are good. Shoes that are
3
/
8
inch wide when measured three
inches up from the bottom.
If the center guide is less than
3
/
8
inch wide, get it replaced.
separated by
5
/
16
inch or more
probably have worn bushings. Get
’em replaced.
SSG Danilo Rodriguez
6/27th FA
Ft Sill, OK
my shoes
are
killin' me
!
can't you
do
something
?
you bet!
i'll
check you
out
right
away!
Dear Half-Mast,
Fig 59 of TM 9-1450-646-24P lists only one vaneaxial fan, NSN 4140-
01-310-1985, for the MLRS.
But, my vehicle uses a different fan. The mounting holes are bent back at
a 90
o
angle and line up differently from the fan that’s shown in the TM.
Is there an NSN for this fan?
SFC W.D.H.
Dear Sergeant W.D.H.,
Yes. The vaneaxial fan you need comes with NSN 4140-01-108-5196. This fan
is currently being replaced by the new fan system, but will remain available until
supplies run out. When that happens, you will have to
buy the new system shown in TM 9-1450-646-24P.
Shoe
gap
less
than
5
/
16
inch?
5
/
16
"
Dear Editor,
Checking your MLRS for
excessive track wear is a time-
consuming chore. Doing it right
means using a tape measure to
check each part individually.
Most crews don’t have that kind
of time, so the track never gets
checked—or at least not often
enough.
Since our biggest problems are
center guide wear and shoe
separation, I made a tool that
makes these checks quick and
easy.
3
/
8
"
Cut the tool from scrap metal
plate using these dimensions:
Make sure you leave enough room
to file down sharp edges without
changing the tool’s dimensions.
Center G
uides: Lay the tool
against the center guide with the
3
/
8
-in side up. That lets you verify
that the center guide is AT LEAST
3"
PS 558
15
MAY 99
MAY 99
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