Figure 3-33.—Repair of tire puncturesPunctured tires can be repaired without beingremoved from the rim. In this case, the insertion of theplug is performed from the outside in, and steps 6 and 7of figure 3-33 are not required.NOTE: For radial-ply tires, repairs can only bemade in the central tread area between the majorgrooves.The procedures for removing and remounting atubeless tire are similar to that for tube tires. If the sealis broken or defective, use a tube inside the tire;otherwise, the tire will lose air, and you will have toinflate it frequently. Some tubeless passenger car tiresmust be removed from the backside of the rim to preventstretching the bead wires too far and causing them tobreak. If in doubt about any detail of the procedure forchanging tubeless tires, follow the tire manufacturer’sinstruction or consult the maintenance supervisor.Earthmover Tire RepairWhen major damage or a blowout occurs or normalwear limits have been reached, the tire must be removed.Size alone makes the removal and replacement ofearthmover tires difficult. Additionally, the nature of theterrain over which they operate often cause conditionsto be far from ideal. Certain tools are necessary tochange these large tires. The hydraulic bead breaker isspecifically designed to break the giant beads for easierremoval of the tire. BEFORE ATTEMPTING TOREMOVE THE TIRE, MAKE SURE THE WHEELHAS BEEN JACKED UP AND THE EQUIPMENTPROPERLY BLOCKED FOR MAXIMUM SAFETY.After the equipment has been safely cribbed, deflate thetire completely by removing the valve core.The clamping device is used to aid in unseating(breaking) the tire beads. Attached to the rim flange, it3-17
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