1挂挡故障(1)原因挂挡故障原因包括:(1)离合器分离不彻底,不能切断发动机动力传递,使齿轮副难于啮合。(2)齿轮齿面磨损、剥落或有裂口,齿端有塌边、崩齿,或轮齿倒角变形、损伤,使齿轮副难于啮合。(3)花键轴磨损产生台阶或毛刺,花键齿槽内有脏物,致使滑动齿轮移动阻力增大,不宜挂挡。(4)拨叉磨损变形或固定螺栓松动。(5)拨叉轴 1 hanging gear failure (1) the reasons for gear failure reasons include: (1) clutch separation is not complete, can not cut off the engine power transmission, the gear pair is difficult to mesh. (2) gear tooth surface wear, peeling or cracks, tooth edge collapse edge, collapse teeth, or chamfer chamfer deformation, damage, the gear pair is difficult to mesh. (3) Spline shaft wear and tear to produce a step or burr, spline tooth groove dirt, resulting in sliding gear movement resistance increases, should not be linked. (4) Fork wear deformation or loose bolts. (5) fork shaft