26.05.2004

Hazards while Servicing Light Truck, Automobile, and Other Small Tires

During the servicing or repair of automobile, light truck, and other small
tires, employees use pressurized air to correctly position the tire against the
rim flange. This procedure is referred to as "seating the bead". The danger of
serious injury or death is present if a tire of one bead diameter is installed
on a rim or wheel of different rim diameter. While it is possible to pass a 16"
diameter tire over the lip or flange of a 16.5" size diameter rim, it cannot be
inflated enough to position itself against the rim flange. If an attempt is
made to seat the tire bead by inflation, the tire bead could break with
explosive force. The hazard is present if an employee tries to install a tire
on the incorrect diameter rim or is attempting to inflate or service a tire
that is already mounted on an incorrect rim. This can be especially hazardous
if an employee attempts to repair or inflate a tire that is not properly
secured to a tire mounting machine, the vehicle, or in a safety cage.

Recommendations

Follow tire manufacturers' procedures and recommendations during the servicing
and repair of automobile, light truck, and other small tires. Tire servicing
procedures should include:

  1. Never attempt to install a tire of one bead diameter on a rim or wheel
    of a different rim diameter. The tire size is molded into the sidewall of the
    tire.

  2. Follow the owner's manual instructions or tire placard instructions located
    on the vehicle. Only inflate tires to the recommended proper inflation
    pressure. Tires should not be inflated above the maximum pressure recommended
    by the manufacturer to seat the tire bead firmly against the rim flange.

  3. Never inflate a tire unless it is securely mounted to the tire mounting
    machine, the vehicle, or in a safety cage.

  4. One useful method is the use of a safety cage or rack that could be used as
    a restraining device when inflating the tires.

  5. Establish proper tire service, repair and inflating procedures and train
    employees to follow these procedures.

  6. Communicate and enforce these procedures.

Further Information


AplusA-online.de - Source: U.S. Department of Labor Occupational Safety & Health Administration