Overrunning Clutch Serpentine Pulley, Fits M1114 Hummer, 12469483 , 600634

The HMMWV 8-groove over-running alternator/clutch pulley (often found on 200A systems) enables the serpentine belt to drive the alternator smoothly while preventing the alternator's high-inertia rotor from back-driving the belt during engine deceleration. This extends belt life and prevents system damage.[1, 2] Key Replacement Specs & Details Part Numbers: 12469483, 12469186 NSN: 3020-01-491-2671 or 3020-01-444-5447 Belt Type: 8-groove serpentine Application: Specifically fits HMMWV variants (including M998, M1025, M1123, and M1151) outfitted with heavy-duty 200-amp alternators.