MAV™ Straw Chopper Complete Chopper System | John Deere STS
The MAV™ Complete Straw Chopper for the STS combine provides a complete replacement for the factory straw chopper and chaff spreaders.

- Spread both chaff and straw through the straw chopper
- Replaces factory straw chopper/chaff spreader
- Spreads 25' to 45' wide
- Cuts material finer with the 1" tight knife bar spacing
- Adjust spreading width quickly with the split tailboard
- Change from chopping straw to dropping in seconds
- Reverse blades when initial blade edge is worn
- Knife bar bank breaks away when needed - minimizing damage
- Residue is projected farther - minimizing dust around the combine
- Achieve an even distribution of residue across width of the cutter bar.
The MAV™ Straw Chopper Rotor Upgrade is available for:
| Combine Model: | Order # |
Notes |
|---|---|---|
| 9870 STS | 320-080 | |
| 9670, 9770 STS | 320-070 | |
| 9860 STS 2006+ | 320-060 | "Bullet Rotor" Combine |
| 9660, 9760 STS 2006+ | 320-050 | "Bullet Rotor" Combine |
| 9860 STS Pre 2006 | 320-040 | |
| 9650, 9750, 9660, 9760 STS Pre 2006 | 320-030 |
Available Upgrade options:
| Upgrade Option: | Order # |
Notes |
|---|---|---|
| Slow Speed Drive - Corn | 390-090 | 9650, 9750, 9660, 9760, 9670, 9770 STS - drive componets c/w hardened corn door |
| Slow Speed Drive - Corn | 390-100 | 9860, 9870 STS - drive componets c/w hardened corn door |
| PLUS+ Wide Spreadk Kit - MAV Choppers | 810-060 | Higher velocity distribution kit for spread widths 36ft and greater |
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