Bridgestone Medium and Light Truck Tire Data Book - Sullivan Tire ...

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Effective January 2010 Prior to operating a vehicle, an inspection should be made of each tire, including the spare. Examine tires for cuts, bruises, cracks, bulges and penetrations. If any damage is found, have the tire examined by a Bridgestone dealer. Repair of tire damage must be made as soon as possible in order to avoid further deterioration of the tire structure. Federal law requires that front axle truck tires on vehicles over 10,000 lbs. gross vehicle weight must have at least 4/32" tread depth. Tread wear indicators are contained in the tread of Bridgestone truck tires and become visible when the tread depth reaches 2/32" in two adjacent major grooves. Drive and trailer tires should be replaced when the tread depth reaches 2/32" or the wear bars appear since 2/32" is the minimum permissible legal tread depth on all axles except the front. Q. Tire Inspection R. Noise Regulation General Technical Information Tires should also be inspected prior to mounting on a rim. Bridgestone steel radial tube-type truck tires are shipped with the flap in the tire. It is essential that the tire be disassembled and inspected thoroughly prior to mounting to insure the inside surfaces are completely dry and clean. Water in casings of steel radial tires may cause tire failure. During normal operation, heat build-up inside the tire will turn water into vapor which may permeate the inner-liner and enter the steel casing cord, causing rust, deterioration, possible sudden tire failure, property damage and/or personal injury. All of Bridgestone’s truck tires comply with the noise emissions standards of 80 dB for medium and heavy trucks. Bridgestone uses the Society of Automotive Engineering recommended test procedures SAE J366b (35 MPH) and SAE J57a (50 MPH). There are many factors that may trigger the occurrence of irregular wear. Among those, mechanical malfunctions of vehicles such as misalignment and uniformity of the tire and wheel assembly are the major factors. If, after correction of these problems is made, objectionable irregular wear is still observed, Bridgestone recommends the following steps be taken: Low profile 75-series tubeless truck radial tires may offer several advantages over standard 90-series tubeless tires, such as: 1. Increased tread life 2. Positive handling 3. Lower vehicle height 4. Lighter weight S. Irregular Wear – Radial Truck Tire T. Low Profile Tires Steer-axle tires: Check thrust angle & apply higher inflation pressure within permissible range (100–115 psi). Drive-axle tires: An increase of 10-15 psi makes the tire less susceptible to irregular wear. Forward movement of the fifth wheel within permissible range greatly reduces irregular wear. Care must be taken when converting to lower profile tires. Differences in overall diameter, static loaded radius and maximum load carrying capacity should be considered prior to mounting lower profile tires. Medium Truck Light Truck General Technical Load/Inflation Technical Bulletins 79
General Technical Information 2010 Bridgestone Medium and Light Truck Tire Data Book Technical Bulletins Load/Inflation General Technical Light Truck Medium Truck U. Mounting/Demounting Procedures Proper mounting procedures must be followed or sudden tire destruction, personal injury or death may result. Tire mounting must be done only by personnel trained, supervised and equipped according to Federal OSHA regulations. Demounting Completely deflate tire by removing the valve core prior to removing the tire and wheel assembly from the truck. Remove tire and wheel assembly from the vehicle and demount the tire from the wheel in the following manner: Tube-type • Ensure that the tire is completely deflated before removing from the rim. Place the tire on the floor, side-ring side up. • Pry the bead loose from the lock ring using the proper tools. • Disassemble the rim parts carefully to avoid damage to the tire, tube, flap or rim parts. • Turn the wheel over and unseat the second bead from the wheel. • Remove the rim from the tire. Tubeless • Ensure that the tire is completely deflated before removing from the rim. • Break the beads loose on both sides of the tire using a bead-breaking tool. • Lubricate both beads of the tire using a vegetable oil-based lubricant only. • Place the tire and rim on the floor with the wide side of the rim down. • Progressively work the tire off the rim using the proper tire irons. Prior to Mounting Clean and prepare rim or wheel – inspect the rim or wheel for damage. Cracked, broken, bent, or otherwise damaged rim components and wheels must not be reworked, welded, brazed or otherwise heated. Never weld a rim with a tire mounted on it or any other time. Proper size tube and flaps (if applicable) must be installed in the tire. New Bridgestone tubes and flaps must be used when mounting new Bridgestone tube type tires. Never use undersized, oversized, or used tubes or flaps. Ensure that rim components are properly matched and that the proper size rim is being used (size, bead taper, etc.). New valves, cores, caps, and O-rings should be installed with new tires. Never mount a damaged tire. 80
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