DB Electrical AKT0017 New Alternator Starter Conversion Kit For John Deere Tractor 3010 3020 4010 4020 24 to 12 volt SE501474 TY16172 100% New aftermarket unit built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value Fits: John Deere 3010, 3020, 4010, 4020 Tractors with Diesel Engine Kit Contains: ADR0437 Alternator, SBO0260 Starter, SFD6003 Solenoid, GDR9106 Bracket, AKT9207 Wire & Cable Kit, SSW0008 Voltage Gauge