SD13型推土机原支重轮轴为光轴(见图1),仅靠两侧直径为(?)4mm的挡圈承受轴向力,推土机转向阻力(轴向力)很大,造成组对间隙A变大,大直径O形圈对浮动油封环压紧力不足,造成漏油。新结构将轴改为轴肩结构(见图2),靠12个M10螺栓(每侧6个)承受轴向力,使浮动油封工作可靠,能适应推土机各种恶 SD13 bulldozers original axle axle for the optical axis (see Figure 1), only by the two sides of the diameter (?) 4mm retaining ring axial force, bulldozer steering resistance (axial force) is very large, resulting in group A Larger, large-diameter O-rings on the floating seal ring lack of pressure, resulting in oil spills. The new structure of the shaft to shoulder structure (see Figure 2), by 12 M10 bolts (6 on each side) to withstand axial force, so that the floating seal reliable, able to adapt to bulldozers of all kinds of evil