Gantry crane electric hoist motor common troubleshooting and handling of small

gantry crane electric hoist motor common small troubleshooting and handling.
1, the motor two-phase operation. Remedy: Check the fuses, contactors and the lugs are properly connected;
2, the stator coil damp. Remedy: repaired, re-dipping drying;
3, the brake gap is too large. Remedy: Adjust the brake clearance, if the brake ring is worn and should be replaced;
4, the supply voltage is too low. Remedy: Ensure motor terminal voltage is greater than 90% of the rated voltage;
5, hoist crane motor cover and brake wheel cement. Remedy: Remove the motor hood, leveraging the brake wheel, so that it can be separated;
6, the motor shaft fastening screws loose. Remedy: Adjust the brake clearance, tighten the screws;
7, the power cord is too thin, the line pressure drop. Remedy: according to the instructions optional power cable;
8, hoist gantry crane the motor phase voltage imbalance. Remedy: Adjust power, to ensure the three-phase voltages differ by less than +3%.