First, remove the front fork. Then find a hammer and two flat thick iron sticks, the bowl group is wedged into the frame, there are two, with the heavy iron stick from the other side of the bowl group you want to dismantle into the bowl group, with a hammer hard knock, the bowl group fell off. The opposite is the same.

The head bowl group of bicycle is located between the front fork and the handle riser. Its action is almost invisible, and the size of fist is easily neglected. The head bowl group is always noticeable only when the fault occurs.