The SM 7839 Alternator Rotor Assembly is a heavy-duty industrial component specifically engineered for the 24-Volt Bosch-style (B. Type) charging systems found in Ashok Leyland heavy commercial vehicles (HCVs) equipped with Hino-series engines. This is the "Big" frame variant, designed for high-amperage Bosch alternators used in multi-axle trucks, tractor-trailers, and luxury buses. Built to O.E. (Original Equipment) Specifications, this rotor is precision-wound to handle the massive electrical and thermal loads of 24V long-haul transport systems.