MAINTENANCE 24.2.14 SELECTION AND INSPECTION OF TIRES WARNING If a tire or a rim is handled wrong, the tire may burst or may be damaged and the rim may be broken and scattered, causing serious injury and/or death. Since maintenance, disassembly, repair and assembly of the tires and rims require special equipment and skill, be sure to ask a tire repair shop to carry out the work. Do not heat or weld the rim to which the tire is installed. Do not make a fire near the tire. Select the tires according to the conditions of use and attachments on the machine. Use only specified tires and inflate them to the specified pressure.
Selection of Tires Select the tires according to the conditions of use and attach- ments of the machine. Use the following table. Since the indicated speed varies with the tire size, consult your Komatsu distributor when using optional tires. Check Tire Pressure and Inflating Tires WARNING When inflating a tire, check that no one will enter the working area and use an air chuck which has a clip and which can be fixed to the air valve. While inflating the tire, check the inflation pressure occasionally so that it will not rise too high. If the rim is not fitted normally, it may be broken and scattered while the tire is inflated.
To ensure safety, place a guard around tire and do not work in front of the rim but work on the tread side of the tire. Abnormal drop of inflation pressure and abnormal fitting of the rim indicate a trouble in the tire or rim. In this case, be sure to ask a tire repair shop to carry out repairs. Be sure to observe the specified inflation pressure. Do not adjust the inflation pressure of the tires just after high speed travel or heavy duty work. Check Measure the inflation pressure with a tire pressure gauge while the tires are cool before starting work. Inflation of tires Adjust the inflation pressure properly.
When inflating a tire, use an air chuck which can be fixed to the valve of the tire. Do not work in front of the rim but work on the tread side of the tire. Standard pressure for 20.5-5.25-12PR (L3 rock) tires is 2.8 kgf/cm (39.8 2 psi). NOTE : The appropriate tire inflation pressure differs according to the type of work, so see “12.18 HANDLING THE TIRES” on page 2-70. 3-41 WA320-3MC