Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Komatsu PC78S5 | 6-12 t | — | rare | — |
| Komatsu PC78US5 | 6-12 t | 2000 | known | 97% |
| Komatsu PC78UU-6 | 6-12 t | 2002 | rare | — |
| Komatsu PC78UU | 6-12 t | 2003 | rare | — |
| Komatsu PC78US | 6-12 t | 2004 | rare | — |
| Komatsu PC78US-6 | 6-12 t | 2004 | known | 100% |
| Komatsu PC78 | 6-12 t | 2004 | rare | — |
| Komatsu PC78MR-6 | 6-12 t | 2006 | known | 100% |