DIN 31051 describes the maintenance as “measures for delaying the reduction of the existing wearout reserve“ of a transporting unit. The maintenance is also used to avoid unanticipated work on the pump. The advantage of a scheduled maintenance is that wear appearances, such as wear or corrosion, can be detected early and corresponding countermeasures can be taken. If detected defects are remedied before a greater damage occurs, costs and efforts for maintaining the operation as well as the operating life of the pump can be reduced significantly. In general, technical rules or the manufacturer’s regulations apply to the maintenance of pumps. Examples include maintenance intervals that are oriented towards the operating time or runtime output. For this reason, the maintenance is generally carried out at regular intervals. It should be performed by trained technical personnel. Most pump manufacturers offer specific maintenance agreements for their products. If a maintenance is not performed according to the specified rules, it can impact the warranty provided by the manufacturer. Besides the external care, the maintenance of pumps also includes inspecting the bearings and shaft seals as well as other components. It is recommended to include the operating personnel in the maintenance since it knows the characteristics of the specific transporting unit min operation, and to check aspects such as smooth operation and current consumption by means of a list. Maintenance should be differentiated from servicing. Besides maintenance, the latter also includes the repair, inspection and optimization of transporting units. Back