Failure and maintenance of self-priming pump motor

Failure and maintenance of self-priming pump motor

When the self-priming pump motor fails, the following phenomena often occur. The specific judgment and maintenance methods are as follows:
   (1) No response after turning on the power.
   Most of them are caused by the disconnection of the power plug, the power lead and the motor winding.
   (2) It is difficult or impossible to start, and it is accompanied by a "buzzing" sound.
    During maintenance, the bamboo blades can be used to quickly turn the fan blades according to the direction of operation. If the motor is running quickly, it means that the starting capacitor or the starting winding is damaged. Replace the capacitor with the same capacity or repair the starting winding. Mechanical failures, such as bearing damage, impeller stuck etc.
(3) The motor can run, but the speed is slow, and the case is overheated and has a burning smell.
    Most of them are caused by short circuit of the motor winding, and the motor should be disassembled and repaired by welding, jumper wire, isolation, rewinding and other measures according to the damage.
(4) During operation, the noise and vibration are large.
     Mostly the bearing is damaged or the bearing and the casing are not properly coordinated. The motor needs to be disassembled and inspected. If the bearing is damaged, it should be replaced; if the bearing is "running outside", the matching surface of the pump casing can be treated with chisel; if the bearing is "Round" can be used to treat the worn parts of the motor shaft with chisel, if the wear is serious, it should be repaired by surfacing first and then turning.

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