Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Komatsu PC128UU-1 | 12-20 t | 1997 | common | 99% |
| Komatsu PC128UU | 12-20 t | 1998 | known | — |
| Komatsu PC128US-1 | 12-20 t | 1999 | rare | — |
| Komatsu PC128 | 12-20 t | 2000 | rare | — |
| Komatsu PC128US | 12-20 t | 2000 | rare | — |
| Komatsu PC128UU-2 | 12-20 t | 2000 | rare | — |
| Komatsu PC128US-2 | 12-20 t | 2001 | known | 97% |