PS Magazine - TB 43-PS-697
PS, The Preventative Maintenance Monthly
ISSUE 697
DECEMBER 2010
4
PS 697
DEC 10
The cracks often appear where the road arm connects to the track adjusting link.
Analysis shows that the cracks result when loads absorbed by the No. 1 roadwheel
are transferred to the connecting point between the road arm and track adjusting link.
In many cases, rust is present inside the cracks, a clear sign that the cracks have
been there for some time. So far, there have been no road arm failures, but that
doesn’t mean they couldn’t happen down the road.
To prevent a failure, inspect the No. 1 road arms on all of your vehicles immediately.
Follow the PMCS procedures in your -10-1 TMs. Some of the cracks are very small
and can be masked by paint on the road arm, so pay close attention to the connection
point between the road arm and track adjusting link.
Find a crack? No matter how small it is, you should immediately order a replacement
arm with a supply request priority of 05 N01 or higher. It’s up to your commander
to decide whether or not to allow limited operations until the replacement road arm
arrives.
You
should
also
get
your mechanic to inspect
the road arm to determine
just how bad the damage
is. If the vehicle stays in
service, it’s a good idea to
place a mark at the end of
each crack, forming a T.
That way, you can tell if
the crack is spreading by
eyeballing the road arms
during daily PMCS.
M1-Series Tanks, M104 Wolverine…
Beware the
CraCk
AttaCk!
check out the complete scoop in tacom maintenance action message 10-034:
crewmen, the left and
right no. 1 road arms on
your m1-series tanks and
wolverine heavy assault
bridge system take a
lot
of stress.
so much, in fact, that
some of those road arms
are starting to
crack.
owww!
my no.1
road
arms are
killing
me!
can’t
you do
some-
thing?
uh-oh!
I’d
better
take a
look!
Check for cracks at connection point
between road arm and track adjusting link
Use marker
to draw
line at top
of crack to
form a T
697.04-05.indd
1-2
11/2/10
5:29 PM
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