Hi I have a Hayward Ecostar SP3400VSP Pump. in the process of replacing the seals I stupidly broke one of the fins on the cooling fan on the back of the motor (replacement part number spx3400z1ecm). I am considering on continuing to use the pump, but am worried about the lack of a fin on the fan causing an imbalance. will the pump still work and if not, does anyone know whether just the fan can be replaced or must I buy a new motor? Thanks in advance for any advice. Regards, etl