Mower Conditioners
John Deere Mower-Conditioners
A mower-conditioner cuts hay and conditions it in one pass, crimping or scuffing the stems so the crop dries down faster and gets baled sooner. John Deere offers side-pull S Series models, C Series models up to a 16 ft cut, front-mount units and triple-mower systems for large acreage.
Koenig Equipment helps hay producers across Ohio and Indiana match cutting width and conditioner type to their tractor and crop. Request a quote on any model and we will help you build the right setup.
Which Mower-Conditioner Is Right for You?
Pick a cutting width your tractor can pull comfortably, then choose the conditioner. Impeller conditioners suit light-stemmed grasses and alfalfa, while urethane or V-10 steel rolls crimp the stems, and C450 and C500 models also offer Tri-Lobe rolls.
| Model | Type | Cutting width | Tractor match |
|---|---|---|---|
| S250 | Side-pull | 8.1 ft | 55 to 75 hp, 540 rpm PTO |
| S300 | Side-pull | 9.75 ft | 65 to 150 hp, 540 or 1000 rpm PTO |
| S350 | Side-pull | 11.5 ft | 90 to 150 hp, 1000 rpm PTO |
| C300 | C Series | 9.8 ft | 540 or 1000 rpm PTO |
| C350 | C Series | 11.5 ft | 90 to 150 hp, 1000 rpm PTO |
| C400 | C Series | 13 ft | 95 to 150 hp, 1000 rpm PTO |
| C450 | C Series | 14.5 ft | 100 to 150 hp, 1000 rpm PTO |
| C500 | C Series, center-pivot | 16 ft | 120 to 210 hp, 1000 rpm PTO |
| F350R and F310R | Front mount | 11.5 ft (F350R) | 7R or 8R with front PTO and front hitch |
| R870R, R950R, R990R | Front plus twin rear system | 28.5, 31.2 and 32.5 ft per pass | 1000 rpm PTO with a 1-3/4 in. shaft |
| SB31 | Frontier sickle bar mower, 3-point | 92.5 in. | 25 to 50 PTO hp, 540 rpm |
Our mower-conditioner model pages do not list a price. Request a quote for current pricing, offers and John Deere Financial options.
Service and Parts Between Cuttings
Our ag technicians service cutterbars, conditioners and drivelines so your mower-conditioner is ready when the hay is. Genuine John Deere knives, disks and belts are stocked at your Koenig store, and you can order parts anytime on Koenig Marketplace.
Schedule service during the season, or book an ag off-season inspection over the winter.
Finishing the Hay Line or Shopping Used?
After cutting, compare John Deere wheel rakes, tedders and balers, or see disc mowers if you do not need conditioning. Looking for pre-owned? Browse used John Deere mower-conditioners and used mounted hay mowers at Koenig, updated as units come in.
John Deere Mower-Conditioner FAQs
What is the difference between a mower-conditioner and a disc mower?
A mower-conditioner cuts the crop and runs it through an impeller or rolls in the same pass to speed dry down. A disc mower only cuts, so the hay dries more slowly unless you ted it.
Which conditioner should I choose?
Impeller conditioners work well in light-stemmed grasses and alfalfa. Urethane rolls work well in legumes and grasses, and V-10 steel rolls add crimping for faster dry down and longer wear life.
What size tractor do I need for a John Deere mower-conditioner?
It depends on width. The S250 needs about 55 PTO hp, the S350 and C350 are matched to 90 to 150 hp, and the 16 ft C500 is matched to 120 to 210 hp tractors.
Can I mow more than 30 ft in one pass?
Yes. The R990R system runs three 11.5 ft mower-conditioners, one on the front hitch and two on the rear, for a 32.5 ft cutting width per pass.
How fast can I change knives?
John Deere mower-conditioners use quick change knives. On the C400, you insert the tool into the disk and press down, so knives swap out in seconds without an impact wrench.