Canada - Wheels/Tires - Dismounting Tires With TPMS

Bulletin
0443

Issue Date
2001-04-24

Market
Canada

Reference
WT-01-002

Model
SC430

Year Range
2002 ~

Component
WT

Subject:
DISMOUNTING TIRES WITH PRESSURE SENSORS

A tire pressure warning system has been adopted as standard equipment on the 2002 MY SC 430. The tire pressure warning system uses a sensor that is mounted in the wheel directly behind, and as part of, the valve stem. Care must be taken when dismounting the tires on this vehicle to not damage the sensor.

APPLICABLE VEHICLES: 2002 model year SC430 vehicles.

REPAIR PROCEDURES:
1. Observe all safety warnings:
- Use approved safety equipment and exercise extreme caution before performing any tire repair or replacement.
- Review all warnings and instructions provided by tire and mounting equipment manufacturers.

2. To prevent sensor damage, drop the sensor into the tire:
- Remove the valve core and release air pressure.
- Remove the nut, washer, and outer grommet and let the sensor drop into the tire.
- Refer to Sensor Removal Procedures in Repair Manual.

3. Remove top bead:
- Use tire lube as recommended by the tire manufacturer.
- Carefully separate the tire bead from the wheel, following tire equipment manufacturer procedures.

4. Remove the sensor from the tire.
5. Remove the bottom bead.
6. Inspect the tire, wheel, and sensor for damage.
7. Replace the sensor fit kit.
- When the sensor is removed, a new fit kit must be installed.

8. Install the sensor.
- Follow the Repair Manual procedure to properly install sensor
- Torque the sensor to the recommended torque specification.







9. Position wheel to avoid damaging the sensor on mounting machine:

If rotation of wheel is clockwise:
- Rotate the wheel until the sensor is at the 7 o'clock position.

If rotation of wheel is counterclockwise:
- Rotate the wheel until the sensor is at the 5 o'clock position.

NOTE:
Always consider the mount/dismount head as the 12 o'clock position.

10. Mount the bottom bead:
- Mount the bottom bead following the tire equipment manufacturer's procedures.
- Use caution to prevent damaging sensor.

11. Mount the top bead:
- Mount the top bead following the tire equipment manufacturer's procedures.
- Use caution to prevent damaging the sensor.

12. Inflate tire.

CAUTION:
Before inflating any tire, exercise extreme caution and follow recommended safety procedures provided by the tire manufacturer. Use an approved safety cage and remote inflation gauge with clip-on chuck to inflate the tire.
- Inflate the tire to seat the beads, deflate, and then inflate to the recommended cold inflation pressure.
- The run flat tire may need higher pressure than normal tires to seat the tire beads.

NOTE:
Never exceed tire manufacturer recommended pressure to seat beads.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.