12V 40 amp alternator to suit Kubota 03 Series Engines as below 
 
D1403 - D1503 - D1703 - D1803 - V1903 - V2003 - V2403 - V2503 - V3300
 
Genuine Kubota product part no : 16404 64012
 
Please refer to drawing prior to ordering as Electrical item cannot be returned .