| Model | Capacity (bushels) with tracks | Capacity (bushels) with tires | Unload speed (bu/min) | Minimum horsepower | SCVs required at 2,320 min. psi |
|---|---|---|---|---|---|
| 1721 | 1,700 | n/a | 750 | 450 HP | 2 |
| 1521 | 1,500 | 1,450 | 750 | 370 HP | 2 |
| 1421 | 1,400 | 1,350 | 750 | 350 HP | 2 |
| 1321 | 1,300 | 1,250 | 750 | 300 HP | 2 |
| 1121 | 1,100 | 1,100 | 550 | 250 HP | 3 |
| 1051 | 1,050 | 1,050 | 475 | 210 HP | 3 |