Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Komatsu PC300LC2 | 30-45 t | 1976 | rare | — |
| Komatsu PC300-3 | 30-45 t | 1985 | rare | — |
| Komatsu PC300LC3 | 30-45 t | 1989 | common | 98% |
| Komatsu PC300 | 30-45 t | 1990 | common | 98% |
| Komatsu PC300NLC5 | 20-30 t | 1992 | rare | — |
| Komatsu PC300-5 | 30-45 t | 1993 | rare | — |
| Komatsu PC300LC5 | 30-45 t | 1994 | common | 97% |
| Komatsu PC300LC5L | 30-45 t | 1994 | known | 96% |
| Komatsu PC300LC | 30-45 t | 1995 | known | 98% |
| Komatsu PC300LC5K | 30-45 t | 1996 | rare | — |
| Komatsu PC300LC5LC | 30-45 t | 1996 | rare | — |
| Komatsu PC300-6 | 30-45 t | 1997 | rare | — |
| Komatsu PC300LC6LEAVANCE | 30-45 t | 1997 | rare | — |
| Komatsu PC300LC7GALEO | 30-45 t | 1997 | rare | — |
| Komatsu PC300HD-6 | 30-45 t | 1998 | rare | — |
| Komatsu PC300LC6 | 30-45 t | 1998 | very common | 99% |
| Komatsu PC300L | 30-45 t | 1998 | rare | — |
| Komatsu PC300HD-5 | 30-45 t | 1998 | rare | — |
| Komatsu PC300LC-6LCAVANCE | 30-45 t | 1999 | rare | — |
| Komatsu PC300LC6L | 30-45 t | 2000 | known | 100% |
| Komatsu PC300HD | 30-45 t | 2002 | rare | — |
| Komatsu PC300LC7 | 30-45 t | 2004 | common | 100% |
| Komatsu PC300-7 | 20-30 t | 2004 | rare | — |
| Komatsu PC300HD-7 | 30-45 t | 2004 | rare | — |
| Komatsu PC300LC7L | 20-30 t | 2004 | common | 100% |
| Komatsu PC300LC7E | 20-30 t | 2006 | rare | — |
| Komatsu PC300LC7E0 | 20-30 t | 2006 | known | 100% |
| Komatsu PC300LC8 | 30-45 t | 2007 | rare | — |
| Komatsu PC300HD7E0 | 30-45 t | 2007 | rare | — |