PS Magazine - TB 43-PS-592
PS, The Preventative Maintenance Monthly
ISSUE 592
MARCH 2002
PS 592
25
PS 592
MAR 02
24
M9 ACE…
The Deal on RoadWheels
Tread Separation and Weather Cracking
Separation of the tread that is
1 inch or wider and goes around
75 percent of the roadwheel
makes your vehicle NMC.
If weather cracks extend
completely across the tread sur-
face the wheel is unserviceable.
Chunking
For roadwheels,
one
missing chunk of rubber
that exposes an area of
metal 3x4 inches or larger
on the wheel surface is
enough to make your vehi-
cle NMC. Even smaller
chunks can make the road-
wheel unserviceable if
together they cover more
than 20 percent of the tread
surface. Depth of the
chunking doesn’t matter.
you’re on
your own
about diinner
and
dessert.
.
At this
point, two
questions
should come
to mind.
no!
that
comes
later!
one:
“Are they
damaged
enough to
replace?”
and, two:
“How do
I keep it
from
happening
again?”
“what’s
for dinner?
What’s for
dessert?”
yeah. I
know.
those
roadwheels
look a little
damaged!
Large chunks of
missing rubber can
make vehicle NMC
Small chunks OK if
they cover less than
20 percent of tread
Check for
separation
that extends
75 percent
around
roadwheel
glad you
asked. turn
the page and
learn
how
you
can help
prevent
roadwheel
damage…
Well, that
answers my first
question, but how
do I keep this
from happening
again and again?
now, here are
the answers to
those questions.
that’s
much
better.
592. 24-27 (C)
2/4/02
1:21 PM
Page 1
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