| Model Num | Machine S/N Base | Machine S/N First | Machine S/N Last |
|---|---|---|---|
| 644, 644A | |||
| Category: Bulldog Hydraulic Kits -> John Deere -> Wheel Loaders | |||
| 644B | * | Prior | 247612 |
| Category: Bulldog Hydraulic Kits -> John Deere -> Wheel Loaders | |||
| 646, 646B | * | Prior | 247906 |
| Category: Bulldog Hydraulic Kits -> John Deere -> Compactor/Dozers | |||