Mounting area
2-5
Stud hole cracks are usually caused by improper torquing (see 4-9, page 29 and 5-2,
page 35), excessive loading or insufficient mounting flange support by the hub
or brake drum. Remove wheel from service.
Shown below are stud hole cracks emanating from stud hole to stud hole. Causes are:
undersized diameter of wheel support surface (see specifications below), support surface
not flat, incorrect attachment parts (see 4-12, page 34) and insufficient torque (see 4-9,
page 29 and 5-2, page 35). 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.
9
2
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