WHITE EQUIPMENT: Rectifier CASE: Rectifier assembly, Delco alternator. I.H.C.: Rectifier services alternators using internal regulator up to and including 80amp., 2 terminal TISCO #'s 1100583, 1102921, 1103155; DELCO #'s 1100491, 1100578, 1100583, 1100585, 1100587, 1100593, 1102375. Use for 585630C1. 1891055 and 1891055HD are not interchangeable. ALLIS CHALMERS: Rectifier assembly. MASSEY FERGUSON: Rectifier assembly, Delco alternator.