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From the Jan 2009 Alcoa wheel service manual: (It has some nice diagrams as well!!)
Hub pilot wheels:
Two-piece flange nuts with a 33mm hex head design (see Section5-2), used with hub piloted wheels
should be tightened to a torque of 450 to 500 foot-pounds. Two-piece flange nuts with 1-1/2-inch
hex head design and other designs have different torque requirements. Inquire of the manufacturer for
the proper torque values. See section 6-2.
Wheel studs on both the right and left side hubs of vehicles utilizing the hub piloted wheel system
have right-hand threads.
Prior to mounting hub piloted wheels, generously coat the wheel pilot or hub pads with a non-waterbased
lubricant to minimize corrosion product build-up between the wheel and hub pilot. Excessive
corrosion build-up between the wheel and hub pilots can make wheel removal difficult. Do not lubricate
the face of the wheel, hub or brake drum (see illustration on the next page).
Lubricate the hub pads or the wheel hub bore generously with a non-water-based
lubricant.
Before installing two-piece flange nuts, lightly lubricate the stud threads and the contact surfaces
between the cap nut and the washer as illustrated below with an SAE 30W oil. This will minimize corrosion
between the mating surfaces. Lubrication is not necessary with new hardware.
Position one of the hub’s pilot pads at the twelve o’clock position. After positioning wheels on the
pilot pads, hand tighten all two-piece flange nuts, then tighten to the recommended torque following
the proper sequence shown below for your type wheel. After 5-50 miles of operation torque should be
rechecked, unless your documented fleet practices determine otherwise. Check torque frequently from
then on. If nuts require frequent tightening, studs break frequently, or wheel bolt holes are pounding
out, hardware and mounting practices should be reviewed.
Stud pilot wheels:
WARNING Lubricants should not be applied to the cap nut seat or to the cap nut-to-wheel
contact surface.
Oiled seats can lead to over-torquing which can stretch studs causing failure of studs.
Failed studs can cause the wheel to disengage from the vehicle, causing serious injury
or death.
Lubricants must be completely removed from the cap nut seats and contact surfaces if
applied accidentally.
It is recommended to torque to between 450 and 500 foot-pounds. If lubricated with SAE 30W oil
torque should be between 350 and 400 foot-pounds. Note: when dualing steel wheels with Alcoa
aluminum wheels, follow the steel wheel manufacturer’s recommendations regarding the proper torque
and use of thread lubricants to mount the wheel.
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