NEW 24 TO 12 VOLT ALTERNATOR AND STARTER KIT FITS JOHN DEERE TRACTOR 3020 TY16172 TS-8000 TY16172 SE501474 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator & Starter Conversion Kit - Voltage: 12V Amperage: 63 Amps Teeth On Drive / Splines: 10 Source: Aftermarket