Permco 257 Serisi Dişli Hidromotor
257 Serisi
| Gear Size (inch) | Displ Cu.In | Theo GPM 1000 RPM | Max RPM | Max PSI |
| 0.50 | 1.28 | 5.5 | 2400 | 4500 |
| 0.75 | 1.92 | 8.3 | 2400 | 4500 |
| 1 | 2.56 | 11.1 | 2400 | 4500 |
| 1.25 | 3.20 | 13.9 | 2400 | 4500 |
| 1.50 | 3.84 | 16.6 | 2400 | 3500 |
| 1.75 | 4.48 | 19.4 | 2400 | 3250 |
| 2 | 5.12 | 22.2 | 2400 | 3000 |
| 2.25 | 5.76 | 24.9 | 2400 | 2750 |
| 2.50 | 6.40 | 27.7 | 2400 | 2500 |
