The SM 7851 Alternator Rotor Assembly is an industrial-grade electrical component specifically engineered for the 90 Amp Bosch-style (B. Type) charging systems utilized in the New Model (N/M) Mitsubishi Canter and Eicher Pro series trucks. This is a "Pump Type" rotor, featuring an integrated rear splined shaft designed to drive the heavy-duty mechanical vacuum pump required for the vehicle's air-over-hydraulic braking system. Built to O.E. (Original Equipment) Specifications, this rotor is designed to handle the high-amperage demands of modern light and medium commercial vehicles (LMCV).