2. Use a screwdriver or wrench to remove the shell of the oil-free pump to get close to the motor.

3. Find the connector of the motor and pull it out. This will separate the motor from other components.

4. Use a wrench or wrench to remove the motor screw, so as to take out the motor from the oil-free pump.

5. After taking the motor out of the oil-free pump, you can check whether the motor is burnt out. If the motor burns out, it needs to be replaced with a new one.

6. When installing a new motor, reverse the operation according to the same steps, put the motor back into the oil-free pump, and reconnect all components.