An Aftermarket Universal Clutch Assembly # 1401150.
This crosses to many OEM numbers including:
Air-Flo A40032, Boss PMV0107, Boss PMV1013, Buyers 1401150, DownEaster SPN104C, Fisher 9207, Henderson 51873, Hi-Way 41719, Hi-Way 79695, Meyer 61167, Monroe 00069497, Monroe 05050107, SaltDogg 1401150, Swenson 04138 017 00, Torwell E22, Western 65212, and Maxim 421000, 99124.
This clutch is for a 1" shaft. It should fit many different salt spreaders. It is a 12V, 6A, 47 watt high torque electromagnetic dry clutch for a spreader transmission system. The clutch may be activated while spinning.
Ths Installation Instructions can be found at this link.