
When a leading data center service provider in Milan faced a critical issue with three third-party 3000kVA low-voltage generators experiencing high vibrations, they turned to Marelli Motori’s highly skilled service department.
The intervention began with a preliminary vibration assessment using advanced instrumentation. This crucial first step allowed our technicians to precisely identify the source and nature of the excessive vibrations. Following this initial diagnosis, our team executed the following procedure:
- Electrical disconnection and mechanical decoupling from the engine (retraction) of each generator.
- Partial dismantling of the generator to access the internal components.
- Replacement of the existing fan with a new one specifically designed and supplied by the generators manufacturer, ensuring optimal performance.
- Precision balancing of the rotor – a critical step to eliminate vibrations and ensure smooth operation.
- Reassembly of the generator, followed by careful mechanical and electrical reconnection.
- Commissioning and comprehensive testing, including new vibration readings and functional parameter checks, to confirm the success of the intervention.
The activity was completed with outstanding results, bringing the generators back to optimal operational parameters and significantly reducing vibrations. This successful intervention in Milan underscores Marelli Motori’s commitment to delivering top-tier service and our ability to handle complex, high-stakes operations for critical infrastructure.

Our dedication to quality and efficiency has not gone unnoticed. The successful completion of this project has directly led to additional orders for alternators reconditioning to be carried out at our facility in Arzignano. Here, Marelli Motori boasts a highly efficient and well-structured service department, equipped with state-of-the-art tools and staffed by experienced professionals, ready to tackle any challenge.