This is a Brand New Altertnator-Starter Conversion Kit Fits John Deere Tractors 3010, 3020, 4010, 4020 with Diesel Engine New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) Our Conversion Kit includes All These Items Starter Alternator Alternator Mounting Bracket Solenoid Amp Gauge Wiring and Cables Needed to Complete the Conversion Please verify this is the right part number before ordering