CUMMINS 3972735, 4936879 DELCO 8600017, 8600020, 8600154, 8700019 OEM(s): Delco Alternator Family: Delco 24SI Voltage: 24 Volts Amps: 70 Amps Regulator Position: 12:00 Polarity: Negative Output Stud Dimensions: 5/16-18 Mount: J180 Reg. Location: Internal Fan Location: Internal Approximate Weight: 17.15 lbs / 7.80 kg