Sugested replacement:  Single Grove solid state alternator pulley 3115J003, 3115H003D
 
OD: 86mm / 3.41 inch
Width: 22mm / 0.87 inch
ID: 17mm
Belt: 13mm
 
Application:   Perkins Alternator 2871A306
Used on:  Caterpillar Ag. & Ind. (2000-2016), JCB (1998-2007)
 
Alternator: Caterpillar 225-3141, 225-3143, 305-3661, 339-7767, 394-3494, 394-3496, 3943496, Delco 8600566, 8600567, Denso 102211-8160, 102211-8170, 102211-8180, DAN653, JCB 714/32200, 71432200, 71440152, 71440153, 71440154, Land Rover YLE10118, Letrika (Iskra) Tech. AAK5384, Lucas 24479, 24480, 24481, Marelli 063377460010, 063377461010, 63377460, 63377461, 63377462, MAN7460, MAN7461, MAN7462,
 
Original Reference Number 29604/3, Perkins Engine 185046500, 185046501, 185046522, 2871A300, 2871A301, 2871A302, 2871A303, 2871A306, 2871A308, 3943494, T414270, TPN758, TPN771, U85046501, U85046501T