Operation 3.3 Operation 3.3.15 Handling the tires Precautions when handling tires z If the following defects are found in tyres, they must be replaced for safety reasons. Tread Breaker or Belt (cord layer) Shoulder z Bead wire is broken or bent, or the tyre is greatly deformed. z Excessive wear and the carcass ply (excluding breaker) is exposed for more than 1/4 of the circumference. z Damage to the carcass exceeds 1/3 of the tire width. Inner liner z Tyre layers are separated. Carcass z Radial cracks reach the carcass. z Deformation or damage which makes the tyre unsuit- able for use. Side wall Bead GK032223 Please contact your KOMATSU distributor when replacing the tires.
It is dangerous to jack up the machine without taking due care. Tire pressure Measure the tire pressure before starting operations, when the tires are cool. If the tire inflation pressure is too low, there will be overload; if it is too high, it will cause tire cuts and shock burst. To prevent these problems, adjust the tire inflation pressure according to the table on the next page. Deflection ratio = H - h / H x 100 As a guideline that can be checked visibly, the deflection ratio of the front tire (deflection/free height) is as follows. When carrying normal load (lift arm horizontal): Approx. 15 to 25 % When digging (rear wheels off ground): Approx.
25 to 35 % When checking the tire inflation pressure, check also for small scratches or peeling of the tire, for nails or pieces of metal which may cause punctures, and for any abnormal wear. GK032224 WA150-5H – VEAM934100 3-97 CAUTION CAUTION