A method for filling sausages with a paste-like substance by means of a filling machine and to a filling machine for performing this method, including a sensor unit capable of determining at least one parameter that varies differently for different paste-like substances as a function of time. Depending on the at least one determined parameter, a controller determines whether a measure to be implemented on one or more wearing parts is necessary, the wearing parts wearing out at different times depending on the different paste-like substances.