The 10940 is a 12v 20 amp alternator, a new aftermarket direct replacement engineered to match the fit, form, and function of the original alternator. Specifications: - Voltage: 12V - Output: 20 amp Vehicle Compatibility: - Makes: John Deere (1981-1989) - Models include: John Deere 750; John Deere 650 - Confirm exact fitment with your year, make, and model before ordering. Cross-Reference / Interchange Numbers: - Replaces / compatible with: 10940, 185046160, 5.5018504616E+11, 550185046160, GP9150, MIA10312, PK185046160. Why ePartsGlobal: specialist in heavy-duty starters, alternators, and charging-system electrical parts. Backed by a 1-year warranty, free shipping on orders over $19.95, and fast fulfillment. Ships from USA.