PS Magazine - TB 43-PS-687
PS, The Preventative Maintenance Monthly
ISSUE 687
FEBRUARY 2010
20
PS 687
FEB 10
21
PS 687
C
hange is good, if something positive comes out of it. And the engineers at TACOM
decided that a design change was good for the drag link in your 2
1
/
2
- and 5-ton
FMTV trucks. The new design stops you from having to order the entire drag link
when a tie-rod end goes bad.
The next time you order the drag link, NSN 2530-01-377-3127, PN 12418103-002,
you’ll see that it looks different. But the only difference is that there is an adjustable
tie-rod end with a clamp on both ends now.
Your maintenance TMs need to be changed to give you the proper instructions for
the new design. And the artwork in the parts manuals need to be changed to match
the new design.
When you get the drag link with the new
design, go ahead and adjust the tie-rod ends
to match the same length of the drag link
being replaced. Turn the steering wheel
fully to the left, too. The drag link must be
installed with the bend turning to the left
to ±t correctly. The clamp on the pitman
arm side must have the bolt adjusted to the
bottom side of the drag link with the bolt
entering from left to right and the clamp 1
centimeter to the rear of the pitman arm.
Then you won’t have interference while
turning the wheel.
There’s a CAUTION in the work package that tells you the tie-rod end must be
installed toward the rear of the vehicle. Ignore that because now both ends have a
tie-rod end. This caution will be deleted in a future TM change.
FMTV…
Drag Link Design Change
Purging PM Info
Correct orientation of drag link
you’ll also need to follow the
IETM’s operating instructions to
drain the tank. it’s in the
‘‘Changing
to a different fuel or fuel grade’’
track. Then perform the field-
level maintenance procedure for
the 2,500 gallon tank drain.
those tracks have the
lowdown on draining solution
from the tanker’s plumbing.
the m9
7
8/a2/a4
fuel tankers
must be
purged
before shipment.
here are some
pm pointers
to keep in mind
when you get the
tankers ready
for deployment,
shipment over-
seas, or when
being processed
directly to a
reset program.
make sure all
the purging
solution is out
of the tanker.
solution left in
the tanker gums
up its plumbing,
including the
hoses, pipes,
valves and filter
separator.
so after purging, unload the solution by
following the procedure to gravity bulk unload
fuel from the tanker. it’s under
operating
instructions
in EM o290 for the m9
7
8, EM 0289
for the M9
7
8A2 and EM 0288 for the M98
7
A4.
this fmtv’s
tie-rod end has
gone
bad!
looks like I’ll
have to order
the entire drag
link again!
with the drag link’s new
design, next time you
won’t have to do that!
M978-Series
HEMTT Tanker…
eventually, the
tanker will not
pump fuel like
it’s supposed to.
687.20-21.indd
1-2
12/28/09
10:05:49 AM
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