Checking the Wheel Nut
Important: In addition to the maintenance interval in this manual, check the wheel nut torque the first 50 to 100 miles (80 to 160 km) of operation after a wheel has been removed and installed.
Note: For all stud-piloted wheels, on each wheel stud, the end that faces away from the vehicle is stamped with an "L" or "R," depending on which side of the vehicle the stud is installed. Studs stamped with an "L" are left-hand threaded and are installed on the driver's side of the vehicle. Studs stamped with an "R" are right-hand threaded and are installed on the passenger's side of the vehicle.
For all stud-piloted wheels, when checking wheel nuts on a dual disc assembly, remove one outer nut at a time, tighten the inner nut, then reinstall the outer nut. Repeat this procedure for all of the inner wheel nuts in the sequence shown in Fig., then tighten all of the outer wheel nuts in the same sequence.
Caution: Too little wheel nut torque can cause wheel shimmy, resulting in wheel damage, stud breakage, and extreme tire tread wear. Too much wheel nut torque can break studs, damage threads, and crack discs in the stud hole area.
Tighten the wheel nuts 450 to 500 lbf·ft (610 to 680 N·m), and see Fig. for the tightening sequence of stud-piloted, 6-stud wheels.
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Front and Inner Rear Dual
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Outer Rear Dual
Fig. 1, Wheel Nut Tightening Sequence (stud-piloted 6-stud wheels)
For hub piloted, 8- and 10- stud wheels, torque values vary with the stud size; consult the wheel manufacturer for recommended torque values. See Fig. for the tightening sequence of hub-piloted, 8- and 10-stud wheels. Before tightening, apply 2 drops of SAE 30W oil to a point between the nuts and flanges.
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8-Stud Disc Wheel
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10-Stud Disc Wheel