Dozers: D31E-20 (S/N: 40087 & up) D31P-20, D31PL-20 & D31PLL-20 (S/N: 45001 & up) D31P-20A (S/N: 45001 & up) D37E-2 (S/N: 1501-2500 & up) D37P-2 (S/N: 1501-2500 & up) D37E-5 (S/N: 1606-3001 & up) and (S/N: A1924 & up) D37P-5A (S/N: 1543-3001 & up) and (S/N: 1649 & up) Graders: GD305A-1A (S/N: 6734 & up)