Attachment III - Technical Information

OVERVIEW

This procedure involves the removal of all four (4) chrome wheel and tire assemblies to check the heat treat (HI) lot code on the wheel. The code is located on the back of the third spoke counter-clockwise from the valve stem when viewing the wheel from the inside. Wheels with the heat treat lot code B1706 must be replaced.

SERVICE PROCEDURE

1. Mark each wheel for location and orientation to the hub for reinstallation. Remove all four (4) wheel and tire assemblies.

2. View the wheel from the inside and locate the third spoke counter-clockwise from the valve stem.

3. Clean the back side of the third spoke so the heat treat lot code can be read.

4. Perform steps 2 and 3 on each road wheel and read the heat treat lot code on each wheel.

(NOTE: Spare wheel is not involved). If the heat treat lot code is not readable, call the Special Service Support Center at 1-800-325-5621 for direction.





5. Any wheel containing the heat treat lot code B1706 must be replaced. See Figure 1.

6. Following the equipment manufacturer's instructions, remove the tire from the known bad wheel.

7. Install a new valve stem in the new wheel. Mount and balance the wheel and tire assembly.

8. Reinstall all four (4) wheel and tire assemblies. Tighten lug nuts to 135 Nm (100 lb-ft).