CHAPTER 2. CARE, MAINTENANCE, AND INSPECTION (Con't)
SECTION I. GENERAL INFORMATION (Con't)
2-3. INFLATION SAFETY (Con't).
c. Inflation Safety, Single-Piece Rims.
(1) To inflate tires of single-piece rims, use a safety inflation cage or bolt the wheel assembly on
the vehicle, with lug nuts fully tightened. If a safety inflation cage or the vehicle are not available for
inflating tires on smaller single-piece rims (i.e. Passenger Car and Light Truck Tires) a positive wheel
lock down device may be used instead. A positive wheel lock down device is defined as a device where
the rim is bolted down securely with nuts (i.e. a tire change machine with screw on flange that locks the
rim to the machine). For single-piece medium truck tires or larger, do not use a positive wheel lock down
device for inflation, only use a tire inflation safety cage or bolt the wheel assembly securely to the vehicle.
(2) Remove the valve core to completely deflate tires before demounting them.
(3) Only inflate the tire to the minimum pressure necessary to force the tire bead onto the rim
ledge while on the tire changing machine. Typically it will take less than 10 psi to seat the bead on a
single piece rim. If more air pressure is needed, never inflate above 40 psi to seat the tire bead. If the
beads are not seated against the rim flange at 40 psi, stop, deflate the tire, and determine the problem.
(4) Never inflate tires on the floor or within any other solid surface that is within three feet of the
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