Generations
| Model | Size | Built around | Used market | Enclosed cab |
|---|---|---|---|---|
| Hitachi EX135UR | 12-20 t | 1998 | known | 100% |
| Hitachi EX135US-5 | 12-20 t | 1999 | rare | — |
| Hitachi EX135USR | 12-20 t | 2000 | known | 100% |
| Hitachi EX135 | 12-20 t | 2000 | rare | — |
| Hitachi EX135UR-5 | 12-20 t | 2001 | rare | — |
| Hitachi EX135US | 12-20 t | 2004 | rare | — |