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