Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Komatsu D20-5 | 0-75 hp | — | rare | — |
| Komatsu D20-7 | 0-75 hp | — | rare | — |
| Komatsu D20 | 0-75 hp | 1980 | rare | — |
| Komatsu D20A-5 | 0-75 hp | 1985 | known | 7% |
| Komatsu D20P-5 | 0-75 hp | 1987 | known | 9% |
| Komatsu D20P | 0-75 hp | 1990 | known | 5% |
| Komatsu D20P-6A | 0-75 hp | 1990 | rare | — |
| Komatsu D20P-6LGP | 0-75 hp | 1990 | rare | — |
| Komatsu D20A-6 | 0-75 hp | 1991 | common | 9% |
| Komatsu D20P-6 | 0-75 hp | 1991 | common | 9% |
| Komatsu D20A | 0-75 hp | 1992 | known | 11% |
| Komatsu D20AG | 0-75 hp | 1992 | rare | — |
| Komatsu D20A-7 | 0-75 hp | 1994 | known | 6% |
| Komatsu D20P-7 | 0-75 hp | 1995 | known | 8% |
| Komatsu D20P-7LGP | 0-75 hp | 1995 | rare | — |
| Komatsu D20P-7E | 0-75 hp | 1996 | rare | — |
| Komatsu D20A-7E | 0-75 hp | 1997 | rare | — |
| Komatsu D20PL-6 | 0-75 hp | 1999 | rare | — |
| Komatsu D20P-5LGP | 0-75 hp | 2004 | rare | — |