2004497 Oil Pump Group Fits Caterpillar AP-1000 AP-1000B AP-1000D AP-1050BOne New Aftermarket Replacement Oil Pump Group that Fits Caterpillar Models: AP 1000, AP 1000B, AP 1000D, AP 1050B, AP 1055B, AP 1055D, AP 755, AP 900B, BG 240C, BG 2455C, BG 2455D, BG 245C, BG 260C, BG 260D, 35, 45, 55, PM 102, 815B, CB 634C, CB 634D, CP 533C, CP 533D, CP 563C, CP 563D, CS 531C, CS 531D, CS 533C, CS 533D, CS 563C, CS 563D, CS 573C, CS 573D, CS 583C, CS 583D, C15, SR4, 30 30, DEUCE, 320B, 320B L, 320B N, 320B S, 322B L, 322B LN, 322C,