In order to detect the actual engagement of the transmission parts, oil filling, oil drainage, oil level indication, air change, removal and hoisting, etc., according to the relevant design manual, the reducer box shall be equipped with peephole and peephole cover, oil drain hole and oil drain bolt, oil mark, ventilator, cover screw, positioning pin, lifting device, bearing cover and other parts, so as to ensure the normal operation of the reducer, in addition to In addition to paying enough attention to the structural design of the box body and shafting components, it is also necessary to fill, drain and indicate the oil level in the lubricating oil pool of the reducer, and reasonably select and design the accessories of the reducer, such as the accurate positioning, opening and lifting of the box base and the box cover during the assembly and disassembly