Cayman 2006 Driving & Safety — Section 2 • 47
WHEEL MOUNTING
Hub Piloted Mounting:
• Before using fl ange nuts that have already been used in service, apply two drops of oil at
one point between the fl ange and hex. This will allow parts to rotate freely and provide
the proper clamping force when tightened. Use any common lubricant typically used
for fasteners. Examples are motor oil and general purpose lubricating oils. Excessive
lubricant is not desirable, and will not improve nut torquing performance. Excessive
lubricant makes the nuts hard to handle, attracts dirt, and may cause unsightly appearance
to the wheel. Only used nuts require lubrication.
• Flange nuts generate higher clamping force. Always use grade eight studs with hub
mount wheels.
• Before installing the wheels, lubricate the hub pilot pads with a drop of oil to prevent
galling. DO NOT lubricate any other wheel or hub surface.
• For a hub with intermittent pilot pads, position a pad at the twelve o’clock position to
center the wheel and reduce runout.
NOTE:
Loosen and tighten lug nuts in a star pattern sequence. Sequence tighten to 50 ft. lbs. first,
then sequence tighten to 450 lbs. Over-tightening can cause distortion.
WARNING:
Never use wheels or lug nuts different than the original equipment as this could damage the
wheel or the mounting system. Damage to the wheel or mounting system could cause a wheel
to come off while the motorhome is in motion.
Front Wheels:
• Slide the front wheel over the studs. Use caution to avoid damaging
stud threads. Snug the nuts in sequence.
• When all nuts have been seated, tighten the nuts to 450 ft. lbs. in the
proper sequence (as shown in illustration).
Dual Rear Wheels:
• Slide the inner dual wheel over the studs. Use caution to avoid
damaging threads. Align the handholds for valve access and slide the
outer dual wheel over the studs, again using caution to avoid damaging
the stud threads.
• When all nuts are seated, tighten the nuts to 450 ft. lbs. in sequence
(as shown in the illustration below).
• The hub mount wheels use two-piece fl ange cap nuts for both front and
rear applications. No inner cap nuts are required.
Torque the Nuts Properly:
• Tighten the wheel nuts to the recommended lug nut torque. DO NOT over tighten.
• Maintain the nut torque at the recommended level through planned periodic checks or at 10,000 miles
intervals, whichever comes fi rst.
• If air wrenches are used they must be periodically calibrated for the proper torque output. Use a torque
wrench to check the air wrench output and adjust the line pressure for the correct torque.
090268c
Flange Nut:
Front and Side view
090268 copy 2
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