6
38
Owner/in-service
identification
6-4
Some fleets wish to specially identify wheels as to OWNERSHIP and IN-SERVICE dates. Alcoa rec-
ommends that fleets and owner-operators adopt the practice of permanently stamping wheels with the
date they are first placed into service.
1. Use “Lo-Stress” stamps or equivalent.
2. Location of stamped areas on outside disc should be in space outward from a line between hand
hole centers and a minimum of one inch from the periphery of any hand hole.
3. Location of stamped identification on inside of wheel should be as close to the factory identification
stamping as possible.
Note: Use of an impression stamp on Dura-Bright
®
surface treated wheels can affect the appearance
and performance of the Dura-Bright
®
surface treatment local to the stamp.
Valves
6-5
Alcoa drop center wheels for tubeless tires come from the factory with air valves installed. If it becomes
necessary to replace an air valve, install it using 9 to 11 foot-pounds of torque.
Replacement valves may be obtained from your authorized Alcoa Wheel Distributor. Always use sili-
cone or EPDM O-rings or grommets – not rubber – when reinstalling valve stems. Metal valve stem
caps are recommended instead of plastic. It is recommended that valve stems with O-rings or grom-
mets be replaced at every tire change.
When replacing valve stems, it is recommended to lubricate the threads and O-ring with a non-water
based tire lubricant.
When valve stem extensions are used, it is recommended that valve stem stabilizers be used.
Balance weights
(clip-on)
6-3
Balance weights for Alcoa wheels are available from your Alcoa Wheel Distributor. With radial tires
it may be necessary to temporarily reduce the tire pressure when installing clip-on weights to allow
clearance of the weight clamp over the rim flange. Use of coated balance weights is recommended
to avoid staining and corrosion of the aluminum wheel surface.
Excessive rim flange wear (see Section 3-12) could dictate the use of “stick-on” or adhesive wheel
weights if there is inadequate rim to properly hold a clip-on style weight.
Improperly installed weights could “fly off” during use and damage the vehicle or cause personal
injury. Always follow the recommended procedures in this manual or the wheel weight manufacturer.
Adhesive weights should be applied only to a clean surface on the brake side of the wheel rim. These
weights should be installed only in a location where they will not contact the brake components
during vehicle operation.
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