CHAPTER 2. CARE, MAINTENANCE, AND INSPECTION (Con't)
SECTION I. GENERAL INFORMATION (Con't)
2-5. SINGLE-PIECE RIMS/WHEELS GENERAL MAINTENANCE PROCEDURES
(3) Current safety and matching charts or vehicle technical manuals containing instructions for
the types of wheels being serviced must be available in the service area.
(4) Never apply heat to a single-piece rim/wheel.
(5) Cracked, broken, bent, or otherwise damaged rims/wheels must not be reworked, welded,
brazed, or otherwise heated, but must be properly scrapped.
(6) Apply rubber lubricant in the bead seat areas to ease demounting. Care must be taken to avoid
damaging the tire beads.
(7) Tires are to be mounted only on compatible rims/wheels having matching bead diameter and
2-6. REFERENCE INFORMATION FOR SAFE MAINTENANCE PROCEDURES
FOR DEMOUNTING, MOUNTING AND INFLATING TIRES.
The "Safety Precautions for Mounting and Demounting Tube-Type Truck/Bus Tires Chart" and the
"Multi-Piece Rim/Wheel Matching Chart" can be obtained from any of the following sources:
U.S. Department of Labor
The Rubber Manufacturers Association (RMA)
OSHA Publication Office
c/o Mail Room, PO Box 3147, Medina, OH
200 Constitution Ave., N.W.
or by contacting the RMA Main Office
Washington, D. C. 20310
at (202) 682-4800
2-7. TUBE AND FLAP USAGE.
a. When installing new tires always use new tubes and new flaps. Used tubes are larger than new
tubes due to service growth. This extra dimension may result in buckles or creases, which lead to leaks
and eventual failure. Never use a buckled or creased tube or flap in any tire as the edges may cut the tube,
b. Flaps must be used in all tube type multi-piece rims, or rims with valve slots. If a flap is not used,
the tube will chafe against the tire toe, which may lead to tube failure. On a rim with a valve slot, the tube
will blowout through the slot if flap is not used.
c. Only use radial flaps with radial tires and tubes. Radial flaps are more flexible than bias flaps and
radial tires and tubes require a flexible radial flap in order to avoid tube chafe at the flap edge, which in
turn may lead to tube failure.
d. Never use bias tubes in radial tires. Splices on bias tubes may not have the splice strength needed
for tubes used in radial tires. Radial tubes are marked "For use in radial tires."
e. Be sure to inspect inside of tire and remove any foreign material such as paper, stones, dirt, water,
etc. Foreign material may cut the tube causing leaks. Water trapped between tube and tire during
mounting may boil during hot service and generate steam. Steam and moisture can penetrate into tire body
causing separation leading to tire failure and possible blowout.