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Tubeless Tire Mounting/Demounting
Re-inflation of any type of tire/rim assembly that has been operated in a run-flat or underinflated condition (80% or less of recommended pressure), can result in serious injury or death. The tire may be damaged on the inside and can explode while you are adding air. The rim parts may be worn, damaged or dislodged and can explosively separate.
DEMOUNTING OF TUBELESS TIRES
- Before loosening any nuts, deflate the tire by removing the valve core.
- With the tire assembly lying flat, unseat the bead seat of both beads with a bead breaker tool. Do not use hammers of any type.
- Apply a proper tire lubricant to the tire beads, rim ledges and flanges.
- Beginning at the valve, remove the tire using tire irons designed for this purpose. Starting at the will minimize chances of damaging the bead. Make certain that the flange with the tapered ledge that has the shortest span to the drop center is facing up. Always attempt to jeep the bead not being worked by the irons, in the full depth of the drop center cavity.
MOUNTING TUBELESS TIRES
- Replace valve stem grommet and inspect valve stem for damage and wear.
Replace valve stem if necessary.
- Apply lubricant.
- With the wheel/rim short ledge up, lay the tire over the rim at the valve side and work it on with proper tubeless tire tools, making full use of the drop center well.
- Do not use any kind of hammer. Bead damage may occur leading to tire destruction and serious or fatal injury to you or your customer.
INFLATION OF TUBELESS TIRES
Re-inflation of any type of tire/rim assembly that has been operated in a run-flat or underinflated condition (80% or less of recommended pressure), can result in serious injury or death. The tire may be damaged on the inside and can explode while you are adding air. The rim parts may be worn, damaged or dislodged and can explosively separate.
- Lay tire/wheel assembly horizontally and inflate to no more than 5 psi to position the beads on the flanges.
- To complete the seating of the beads, place the assembly in an OSHA approved safety cage and inflate to 25 to 30 psi. Check the assembly carefully for proper bead seating and for any signs of distortion or irregularities from the run-flat.
- If beads are properly seated, and if no damage is detected, continue to inflate to the maximum air pressure marked on the sidewall. If beads do not seat, deflate tire, relubricate the bead seats and reinflate.
- After beads are properly seated, adjust tire pressure to recommended operating pressure. Check valve core for leakage, then install a metal or hard plastic valve cap.

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