Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Komatsu D31P15 | 0-75 hp | — | rare | — |
| Komatsu D31A-16 | 0-75 hp | 1979 | known | 12% |
| Komatsu D31P16LGP | 0-75 hp | 1979 | rare | — |
| Komatsu D31-16 | 0-75 hp | 1980 | rare | — |
| Komatsu D31A | 0-75 hp | 1980 | rare | — |
| Komatsu D31P16 | 0-75 hp | 1980 | common | 13% |
| Komatsu D31P-17 | 0-75 hp | 1984 | common | 13% |
| Komatsu D31 | 0-75 hp | 1985 | common | 21% |
| Komatsu D3117 | 0-75 hp | 1985 | rare | — |
| Komatsu D31E17 | 0-75 hp | 1987 | rare | — |
| Komatsu D31A-18 | 0-75 hp | 1990 | known | — |
| Komatsu D31P-18 | 0-75 hp | 1990 | common | 9% |
| Komatsu D31LGP | 0-75 hp | 1990 | rare | — |
| Komatsu D3118 | 0-75 hp | 1990 | rare | — |
| Komatsu D31P18LGP | 0-75 hp | 1990 | rare | — |
| Komatsu D31E18 | 0-75 hp | 1991 | known | 29% |
| Komatsu D31P18A | 0-75 hp | 1991 | common | 9% |
| Komatsu D31P | 0-75 hp | 1992 | common | 13% |
| Komatsu D31E | 0-75 hp | 1993 | known | 20% |
| Komatsu D31P17LGP | 0-75 hp | 1994 | rare | — |
| Komatsu D31E-20 | 0-75 hp | 1996 | common | 8% |
| Komatsu D31P-20 | 0-75 hp | 1996 | common | 13% |
| Komatsu D31P20LGP | 0-75 hp | 1996 | rare | — |
| Komatsu D31PLGP | 0-75 hp | 2000 | rare | — |
| Komatsu D31PX-21 | 0-75 hp | 2004 | common | 47% |
| Komatsu D31EX-21 | 0-75 hp | 2005 | known | 70% |
| Komatsu D31EX | 0-75 hp | 2005 | rare | — |
| Komatsu D31PX | 0-75 hp | 2006 | rare | — |
| Komatsu D31EX-21A | 0-75 hp | 2006 | rare | — |
| Komatsu D31PX22 | 75-100 hp | 2010 | rare | — |