Magazine for the professional tire industry
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75 www.moderntiredealer.com 4) Mount the tire on the wheel fol- lowing the tire changer manufacturer's instructions, paying special atention to the following to avoid damaging the tire pressure sensor: • Rotating wheel tire changers: Once the wheel is mounted to the changer, position the sensor valve stem approxi- mately 210 degrees from the head of the changer in a clockwise direction before rotating the wheel (also in a clockwise direction) to mount the tire. Use this procedure on both the upper and lower tire beads (see Figure 6). • Rotating tool tire changers: Position the wheel on the changer so that the sensor valve stem is approximately 210 degrees from the head of the changer in a clockwise direction from the mounting end of the tool (see Figure 7). Make sure the sensor is clear of the lower bead breaker area to avoid damaging the sensor when the breaker rises. Always rotate the tool in a counterclockwise direction when mounting the tire. Use this procedure on both the upper and lower tire beads. 5) Adjust air pressure to specifcation. Make sure the original style valve stem cap is securely installed to keep moisture out of the sensor. Install the wheel and tire assembly on the vehicle. 6) Drive the vehicle for a minimum of 10 minutes while maintaining a continu- ous speed above 20 mph (24 km/h). During this time, the system will learn the new sensor ID code and will clear any DTCs automatically. If a sensor cannot be trained, see appro- priate manufacturer service information. REMINDER : Do not use chrome- plated lug nuts with chrome-plated wheels. Over-torquing the sensor nut by as litle as 106 in.-lbs. (12 N.m) may result in sensor separation from the valve stem. Under this condition, the sensor may still function; however, the condition should be corrected immediately. ■ Information for this column comes fom Mitchell 1's "Tire Pressure Monitoring Systems Guide" for domestic and import vehicles. Headquartered in Poway, Calif., Mitchell 1 has provided quality repair information solutions to the automotive industry for more than 80 years. For more information, visit www.mitchell1.com. Figure 6: Mounting the tire using a rotating wheel machine. Figure 7: Mounting the tire using a rotating tool machine. TORQUE SPECIFICATIONS Component Ft.-lbs. (N.m) Spare tire winch..................................28 (39) Wheel nut............................................85-115 (116-156) In.-lbs. (N.m) Tire pressure sensor nut....................66 (7.5) Quik-Link: 800-687-1557 ext. 11134 Valve stem Valve stem Head of changer located here Band breaker (keep clear of sensor) Mounting end of tool