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3
Heat damage
3-3
Inspect for exposure to excessive heat. A wheel that has been subjected to excessive heat may appear
charred or burned. A wheel that has been exposed to excessive heat may appear to be in good condi-
tion if it has been cleaned. Do not use any wheel that has been overheated regardless of appearance.
Even if a wheel does not appear to be obviously burned, labels, tire bead, brake drum and Disc Mate
for evidence of charring, melting, blistering or burning.
A wheel may discolor from excessive heat. It can appear a dull grayish color and will not polish to a
bright finish as a typical wheel would.
Any wheel run with a flat tire longer than the time necessary to immediately pull off
the road should be checked for excessive heat damage.
WARNING
Excessive heat from fire, brake malfunction, wheel bearing failure, tire
failure or other sources may weaken the metal and cause the wheel/tire assembly to
separate explosively.
Exploding wheel/tire assembly can cause serious injury or death.
Immediately and permanently remove from service any wheel that has been exposed
to excessive heat.
WARNING
A blistered, charred, blackened or cracked-
looking logo decal on an Alcoa wheel may
indicate that the wheel has been exposed to
excessive heat as shown in picture to the left,
or discoloration of the wheel as shown in pic-
ture to the right
Inspect all axle end components for signs of
exposure to excessive heat. Pay particular
attention to brake drums (or discs), Disc Mate
wheel liners and tire beads. If these components
show signs of over heating, the entire assembly,
including the wheel, should be replaced.
Charred Sticker (prior to 2009)
Discoloration of Wheel
Charred Rubber
Charred Discmate
IF ANY OF THE ABOVE CONDITIONS ARE SEEN, REMOVE THE WHEEL FROM SERVICE IMMEDIATELY. THIS INCLUDES ANY HEAT DAMAGE TO
THE TIRE, DISCOLORATION TO THE WHEEL, AND OR BRAKE DRUM, AND ANY BURNT OR CHARRED LABELS.
Wheels manfactured starting in January 2009 will
have a 1 inch clear round heat indicator located next
to the roll stamp on the inside shown on the left and
right, along with the same 1 inch clear round heat
indicator located on the tire side drop well as shown
in the photo above.
If either of these round labels show signs of blistering,
charred, blackened, or cracked look, this may indicate
that the wheel has been exposed to excessive heat.
Charred Heat Indicator
(2009 and after)
Charred Heat Indicator Drop Center (2009 and after)
After January 2009 the new Alcoa Logo may
not show heat damage
Charred Heat Indicator
(2009 and after)
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