Ｊ—５０变速箱主轴的改进东方红林业局机电厂张立和，高希海原Ｊ—５０拖拉机变速箱主轴是用螺帽固定，然后用锁片锁紧的。在使用中常发生螺帽脱落，致使主轴后窜，造成掉档、后盖损环等故障。维修时，需把变速箱拆下才能修理．在林场修理很不方便，劳动强度大，也不安全... Improvement of the Spindle of J-50 Transmission Dongli Hong Forestry Machinery Factory Zhang Lihe and Gao Xi Hai Yuan J-50 tractor transmission spindle is fixed with a nut and then locked with a locking plate. Nuts often occur in the use off, resulting in the spindle after channeling, resulting in off the file, the back cover damage and other failures. Repair, remove the gearbox to repair. Repair in the forest is very inconvenient, labor-intensive, it is not safe ...