Tire scraper slag machine transmission of several common disease like tire shoulder drum kit: no trauma cases under the shoulder, shoulder appeared drum kits, after dissecting delamination interface between components, sometimes accompanied by friction carbonization. This is due to the long high speed cause heat buildup shoulder, rubber thermal aging, long bulge region. Crown trauma: poor tire construction site, scratched or bite wounds sharp objects, produce serious or blasting off the block. Groove crack: tires in use, due to work pressure discrepancies or soft surface, increasing the friction between the tire and the ground block, torque is too large, frequent pattern discontinuity ditch, ditch pattern accelerate fatigue damage, Breaking the ditch leading to injury tear. Break line: tires at low pressure or overload condition, tire sidewall flex large carcass temperature is too high, the cord strength decreased, resulting in fetal cord 周向松 medial scattered, broken, produce severe blast. Side air: overload tire sidewall flex lead to excessive deformation increased. Sidewall portion due to excessive shear separated between the rubber and the cords or cords and cords. Blasting toe mouth: vehicle overload, when speeding, single tire load is too large, causing the tire burst from toe mouth parts. 

palabras clave: Cinder wheeled machine, rake slag, slag operating,