T he pump no longer provides power. Detecting a worn stator on the mash pump with the naked eye is difficult or almost impossible. However, if you notice, after loosening the four stator tie rods, that it can easily be pulled down from the rotor, then the stator has to be replaced in any case so that the pump can bring back its power and also build up the pressure.

O ften it is done with a new stator, but not always. Although the rubber is the first that is subject to wear, but also on the rotor time does not pass without a trace. If it‘s worn, then the necessary pre-tension is missing and the mash pump can no longer build up pressure, or despite a new stator, power and pressure drop again after a relatively short time.

T he pump will leak at the drive shaft or stub shaft. This usually occurs with pumps with stuffing box packing. Here carefully the packing should be tightened on the packing goggles. If this is older, it should be replaced with fresh, supple. Maybe the wear is already bigger and the shaft has to be renewed, which can be recognized by the fact that the run-in tracks are present and the diameter is reduced.

E ach time the rotor is changed, the joint boots and other joint parts should be replaced at the same time. Likewise, the joint lubrication (food oil / fat). If you omit this, there is a risk that the pump will next suffer joint damage. If the mash pump already clutches, it is too late and there is greater damage.