The following project is focused on the design and implementation of a predictive maintenance system for a hydraulic system of a waste collection truck. This thesis is an outcome of the collaboration with the Competence Industry Manufacturing 4.0 of Torino, which at the same time collaborated for this project with the company SEA Ambiente, which is in charge of collecting the waste of different city locations. After taking the Failure Mode and Effects Analysis of the hydraulic system provided by the SEA company. Two main failures were identified, the first one is oil leakage in the hydraulic cylinders and the second wear in the rail pads where the hydraulic actuators perform a linear displacement for trash compaction.