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Alternator Rotor Assembly (11SI Series – Heavy Duty – O.E. Spec)

Alternator Rotor Assembly (11SI Series – Heavy Duty – O.E. Spec)

The SM 2057 is a premium-grade Alternator Rotor (Armature Assembly) designed specifically for the Delco Remy 11SI series alternators. Calibrated for a 12V system with a 4-Pin regulator interface, this rotor is a staple in medium-duty trucks, agricultural machinery, and industrial power units. It is engineered to provide high output at low idle speeds, a hallmark of the 11SI high-efficiency design.

SKU

SM 2057

Specification

Brand: Yessem Grand

Compatibility:

Delco Remy: 11SI Series (High-output versions)

Applications: Case, Cummins, John Deere, and various medium-duty commercial vehicles.

System Voltage: 12V (Twelve Volts)

Terminal Configuration: 4-Pin (Designed for P-L-I-S or P-L-F-S regulator types)

Component Type: Alternator Rotor / Armature Assembly

Design: 11SI Style (Internal Fan / High Efficiency)

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