10
3
Mounting area
3-6
Stud hole cracks are usually caused by improper torquing (see Sections 5-8, and 6-2), excessive load-
ing or insufficient mounting flange support by the hub
or brake drum. Remove wheel from service.
Shown below are stud hole cracks emanating from bolt hole to bolt hole. Causes are: undersized
diameter of wheel support surface (see specifications on next page), support surface not flat, incorrect
attachment parts (see Section 5-2) and insufficient torque (see Sections 5-8, 5-11, 6-2). Remove wheel
from service.
Support surface should be flat to the diameter recommended on the chart on the following page.
Inspect the hub/drum
contact area thoroughly
for cracks or other
damage.
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