Modern Tire Dealer

DEC 2018

Magazine for the professional tire industry

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Page 93 of 113

M T D D e c e m b e r 2 0 1 8 92 4) Remove the valve stem from the wheel (see Figure 2). Installation NOTE: If replacing the tire pressure sensor, a new valve stem will be pre-mounted to the sensor as an assembly. Verify that the sensor is positioned properly before seating the valve stem. If replacing a valve stem only (using the existing tire pressure sensor), the new valve stem will include a new tire pressure sensor mounting screw. Always use a new mounting screw when attaching a sensor to a valve stem. 1) Wipe the area clean around the sensor/ valve stem mounting hole in the wheel. Make sure the surface of the wheel is not damaged. 2) Insert the new valve stem into the rim and pull through with a standard valve stem installation tool. 3) If replacing the valve stem only, verify that the flat sides of the brass extension on the bottom of the valve stem are at a 90 degree angle with the wheel (see Figure 2). 4) Position the pressure sensor over the brass extension. 5) Install the retainer screw and torque to 12 in.-lbs. (1.4 N.m). 6) Mount the tire on the wheel following the tire changer manufacturer's instructions, paying special attention 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 approximately 280 degrees from the head of the changer in a clockwise direction before rotating the wheel (also in a clock- wise direction) to mount the tire. Use this procedure on both the upper and lower tire beads (see Figure 3). • 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 mount- ing end of the tool (see Figure 4). Make sure the sensor is clear of the lower bead breaker area to avoid damaging the sensor when the breaker rises. Rotate the tool in a counterclockwise direction to mount the tire. Use this procedure on both the upper and lower tire beads. 7) Adjust air pressure to specification. 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. 8) Drive the vehicle for a minimum of 5 minutes while maintaining a continuous speed above 20 mph (32 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 the appropriate manufacturer service informa- tion. ■ Information for this column comes from the tire pressure monitoring systems data in ProDemand®, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in Poway, Calif., Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918. For more information, visit To read archived TPMS articles, visit T P M S Figure 4: Mounting the tire using a rotating tool machine. COURTESY OF CHRYSLER CORP.

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