To locate a puncture in a tire, inflate it to the maximum
inflation pressure indicated on its sidewall. Then
submerge the tire/wheel assembly in a tank of water or
sponge it with a soapy water solution. Bubbles will identify
the location of any air leakage.
Mark the location of the leak with a crayon so it can
be easily found once the tire is removed from the wheel.
Also use the crayon to mark the location of the valve
stem so that original tire and wheel balance can be maintained
after the tire is put back on the wheel.
The proper procedure for dismounting and remounting
a tire is illustrated in Photo Sequence 45. Do not use
hand tools or tire irons alone to change a tire because they
might damage the beads or wheel rim. When mounting
or dismounting tires on vehicles using aluminum or wire
spoke wheels, it is recommended that the tire changer
manufacturer be contacted about the accessories that are
required to protect the wheel's finish.
Repair Methods
Once the tire is off the wheel and the cause of the puncture
is removed, the tire can be permanently serviced
from the inside using a combination service plug and
vulcanized patch. While the service kit's instructions
should always be followed, there are some general guidelines
that help make a good, permanent patch of the
puncture. The following methods are the most common
methods used to repair a tire.
Plug Repair The head-type plug (Figure 42-15)is commonly
used. A plug that is slightly larger than the size of
the puncture is inserted into the hole from the inside
of the tire with an insertion tool. Before doing this, insert
the plug into the eye of the tool and coat the hole, plug,
and tool with vulcanizing fluid.
While holding and stretching the long end of the
plug, insert it into the hole. The plug must extend above
both the tread and inner liner surface. If the plug pops
through, throw it away and insert a new plug. Once the
plug is in place, remove the tool and trim off the plug 1/32
inch (0.7 mm) above the inner surface. Be careful not to
pull on the plug while cutting it.
Cold Patch Repair When using a cold patch, carefully
remove the backing from the patch. Spread vulcanizing
fluid on the punctured area. Let it dry, then center the
patch base over the punctured area. Run a stitching tool
over the patch to help bind it to the tire.
To locate a puncture in a tire, inflate it to the maximum
inflation pressure indicated on its sidewall. Then
submerge the tire/wheel assembly in a tank of water or
sponge it with a soapy water solution. Bubbles will identify
the location of any air leakage.
Mark the location of the leak with a crayon so it can
be easily found once the tire is removed from the wheel.
Also use the crayon to mark the location of the valve
stem so that original tire and wheel balance can be maintained
after the tire is put back on the wheel.
The proper procedure for dismounting and remounting
a tire is illustrated in Photo Sequence 45. Do not use
hand tools or tire irons alone to change a tire because they
might damage the beads or wheel rim. When mounting
or dismounting tires on vehicles using aluminum or wire
spoke wheels, it is recommended that the tire changer
manufacturer be contacted about the accessories that are
required to protect the wheel's finish.
Repair Methods
Once the tire is off the wheel and the cause of the puncture
is removed, the tire can be permanently serviced
from the inside using a combination service plug and
vulcanized patch. While the service kit's instructions
should always be followed, there are some general guidelines
that help make a good, permanent patch of the
puncture. The following methods are the most common
methods used to repair a tire.
Plug Repair The head-type plug (Figure 42-15)is commonly
used. A plug that is slightly larger than the size of
the puncture is inserted into the hole from the inside
of the tire with an insertion tool. Before doing this, insert
the plug into the eye of the tool and coat the hole, plug,
and tool with vulcanizing fluid.
While holding and stretching the long end of the
plug, insert it into the hole. The plug must extend above
both the tread and inner liner surface. If the plug pops
through, throw it away and insert a new plug. Once the
plug is in place, remove the tool and trim off the plug 1/32
inch (0.7 mm) above the inner surface. Be careful not to
pull on the plug while cutting it.
Cold Patch Repair When using a cold patch, carefully
remove the backing from the patch. Spread vulcanizing
fluid on the punctured area. Let it dry, then center the
patch base over the punctured area. Run a stitching tool
over the patch to help bind it to the tire.
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