DIN 31051 defines maintenance as a series of measures to slow down the degradation of the existing wear stock in a unit. The main objective of maintenance is to prevent unexpected work on the pump.
A significant advantage of planned maintenance is that signs of wear or corrosion can be detected early, allowing appropriate countermeasures to be taken quickly. Correcting detected defects before they lead to significant damage can significantly reduce the costs and effort required to maintain operation and the pump's service life. For pumps, specific technical rules or the manufacturer's instructions for maintenance generally apply. This includes maintenance intervals based on the operating time or mileage. Typically, maintenance is carried out regularly and should be done by qualified personnel. Many pump manufacturers offer special maintenance contracts for their products. Maintenance not carried out according to the specified instructions may affect the manufacturer's warranty. Pump maintenance includes external care and checking bearings, shaft seals and other components. It is advisable to involve the operating staff in the maintenance process, as they are familiar with the specific operational characteristics of the unit and can use a checklist to verify aspects such as smoothness, motor performance and current consumption. It is essential to distinguish maintenance from servicing. The latter includes maintenance, repair, inspection and optimisation of gensets.