1. First, slowly knock out the motor stator coil core with a hammer and a wooden stick. The motor coil iron core of the water pump can be divided into large and small heads, so it must be clearly separated when disassembling.

2. Secondly, after taking out the core of the coil, it is necessary to record the connection mode of the coil and the number of motors.

3. Finally, clamp the coil core with a vice, preferably a wooden clamp. The diameter difference between the wooden clamp and the coil core is 10mm, and it is clamped in a vise to prevent the coil core from deforming.