在更换小型内燃机的活塞时，拆装半浮式活塞销（与连杆销孔为紧配合）时须使用专用工具，以确保其装配质量。下面介绍一种拆装半浮式活塞销的专用工具。 由附图知：该工具主要由丝杠、螺母、轴承座、轴承、套筒、导向柱塞和螺杆等组成。丝杠、螺杆均通过 螺纹与导向柱塞连 接； When replacing the pistons of a small internal combustion engine, special tools must be used to disassemble the semi-floating piston pins (tight fit with the connecting rod pin holes) to ensure the assembly quality. Here’s a removable semi-floating piston pin special tools. By the drawings know: The tool mainly by the screw, nut, bearing, bearing, sleeve, guide plunger and screw and other components. Screw, screw are connected with the guide plunger through the thread;