UA53153 MINI-Alternator—42 Amp with Pulley and Diode

For tractors requiring a smaller diameter alternator for clearance
Dimensions & Notes: 4-1/2″ housing diameter, 2-1/2″ pulley diameter—-3/8″ belt width
For 12 Volt Negative Ground Systems Only
This alternator has a built in regulator, that requires an excitation circuit–Includes Instructions