View 14 Photos View 0 Videos Cummins ISL Alternator Support Bracket Part # 3970650, Pulley Part # 3924977 $425 USD (GOOD USED) 2009 Cummins ISL 8.3L Diesel Engine Alternator Support w/ Pulley For Sale, Support Part # 3970650, Pulley Part # 3924977, Pulled Off 2009 Cummins ISL 8.3L CM2150, Stock # 9860... ConditionUsedPart Number3970650, 3924977Stock Number9860 MLS Number14029443CategoryAlternators Last Updated12/11/2025 LocationOpa Locka, FL, US Sold ByCA Truck Parts Inc. (305) 688-___ SHOWNUMBERCall Seller Email Seller Save More Info