Balmar > Alternators Alternator: 97XD-12-240-IG Description Alternator: 97XD-12-240-IG- 97XD Series- 240A- 12V- Saddle Mount (Dual Foot)- 4in- Deep Dual Vee Pulley*- Isolated Ground- 4" J-180-Style Mounting:Typical for Caterpillar, Cummins, Detroit Diesel & John