5
36
Owner/in-service
identification
5-5
Some fleets wish to specially identify wheels as to OWNERSHIP and IN-SERVICE dates.
Alcoa recommends 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
5-6
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 the following
torque values.
10-14 foot-pounds for Part Nos. 7-11 foot-pounds for Part Nos.
TR 509 TR 542 Series
TR 510 TR 543 Series
TR 511 TR 544 Series
TR 545 Series
60MS27N
Replacement valves may be obtained from your authorized Alcoa Wheel Distributor.
Always use silicone o-rings – not rubber – when reinstalling valve stems. Metal valve
stem caps are recommended instead of plastic.
When replacing valve stems, it is recommended to lubricate the threads and o-ring
with a non-waterbased lubricant.
Do not straighten
wheels
5-4
Do not heat wheels in an attempt to soften them for straightening to repair damage
from striking curbs or other causes. The special alloy used in these wheels is heat
treated, and uncontrolled heating will weaken the wheel.
Do not rework, weld, heat or braze Alcoa aluminum wheels for any reason. This does
not include normal wheel maintenance as described and approved by Alcoa.
Lead balance
weights (clip on)
5-3
Lead 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 2-11, pages 13-17) 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.
WARNING Welding or brazing the rim flange or any area of an Alcoa aluminum wheel will
weaken the wheel. Weakened or damaged wheels can lead to an explosive separation
of tires and wheels or wheel failure on the vehicle.
Explosive separations of tires and wheels or wheel failure on the vehicle could cause
injuries or death.
Never attempt to weld or braze any surface of an Alcoa aluminum wheel.
WARNING
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