1) prior to demolition, use compressed air purge motor surface dust and wipe clean surface dirt.

 (2) Select the motor disintegration place of work, clean up the site environment.

(3) the familiar motor structural features and maintenance of the technical requirements.

(4) the disintegration of the required tools (including special tools) and equipment ready.

 (5) In order to further understand the defects in motor running, when conditions prior to demolition to do an inspection test. To do this, bring the motor load commissioning detailed examination of motor temperature, sound, vibration, and test the voltage, current, speed, and then disconnect the load, do a single-load check test measured empty load current and no-load losses and make a record.

(6) Turn off the power, remove the motor external wiring, make a record.

(7) the megger test insulation resistance of the motor to choose a suitable voltage. In order to compared with the measured insulation resistance value of the last overhaul to determine the trend of motor insulation and insulating state generally convert to 75 ° C, the insulation resistance values ??measured at different temperatures should be converted to the same temperature.

 (8) Test absorption ratio K. When the absorption ratio is greater than 1.33, indicating that the motor insulation never get wet or damp not serious. Also want arbitrary temperature measured absorption ratio in order to be compared with the previous data, converted to the same temperature.