1. Before the pump should be used to check the motor winding insulation resistance, such as less than.
2. Pump body inlet at the gap between the impeller and the oil seal if more than 2mm should be replaced by wear resistant oil seal.
3. When the pump seal leakage should be timely replacement of seals, replacing the static seal installed paperback real, then the dynamic seal on the shaft can be.
4. Replacement of the impeller, the application developer pulled out with a hammer not too hard, so as not to damage the axis.