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Front Mount Mower-Conditioner

  • High-speed rotary disk cutterbar for cutting in tough conditions
  • Windrowing solutions to match your needs
  • Use front hitch for maximum productivity


Adjustable forming shields (curtain moved for visibility)Adjustable forming shields (curtain moved for visibility)

The desired swath width can easily be obtained by loosening the handle on each side and moving the adjustable swath deflectors to the desired position. Swath width is adjustable from 1.4 m to 2.0 m (4 ft, 7 in. to 6 ft, 6 in.) on the 131 Front-Mounted Mower-Conditioner.


The available room for a windrow is a function of wheel spacing and tire width. The windrow width of the 131 Front-Mounted Mower-Conditioner may be narrower than the windrows from a 388 Twin Rear-Mounted Mower-Conditioner if the forming shields are adjusted so the tractor does not drive on the windrow that is produced.


A wide spread kit is available as a field-installed bundle. This kit is composed of vanes installed under the conditioning hood. The crop flow is spread to approximately the machine working width and offset about 400 mm (15.75 in.) on the left-hand side. This allows a clean separation between the uncut crop and spread crop.

131 Mower-Conditioner cutterbar (shields raised for visibility)131 Mower-Conditioner cutterbar (shields raised for visibility)

Power is transmitted from the 1000-rpm PTO on the front of tractor through gearcases to the cutterbar.

  • Standard position for main gearcase utilizes clockwise (as determined by direction of travel) rotation of the front PTO.
    • Gearcase can be reversed for use with tractors with a counterclockwise (as determined by direction of travel) front PTO
  • Cutterbar is protected by a slip clutch and overrunning clutch
  • Cutterbar is securely mounted within the frame for strength and durability

Power is transmitted to the rotary disks through fully enclosed gears, running in oil, for quiet, smooth, reliable operation

  • The high-speed rotary disks cut in the toughest conditions. The disks rotate at 2986 rpm.
  • Low-profile design enables cutting close to the ground at a flat angle helping prevent damage to the disks and knives.
  • Pinion gear is easily removed from the top of the cutterbar for service
    • Idler gears can be removed from access area after removal of pinion gear
Turnbuckle adjustmentTurnbuckle adjustment
Cutting height is adjusted by changing the turnbuckle on the front hitch. Cutting range is from 30 mm to 80 mm (1.2 in. to 3.15 in.).
Impeller conditionerImpeller conditioner

The mower-conditioner is equipped with 54 free-swinging, steel impeller tines. This John Deere conditioner provides excellent conditioning performance and fluffy windrows. 

Impeller conditioning is standard equipment on all John Deere mower-conditioners.


Proper conditioning in a wide range of crops can be achieved when the conditioner is properly adjusted.


The impeller conditioner works well in legumes, especially alfalfa and most all-grass crops. Impeller conditioners are not recommended for thick-stemmed or cane-type crops, such as sudan or sudex, or crops over 5-ft tall.

How an impeller conditioner works:
Impeller conditioningImpeller conditioning
  1. As hay is cut by rotating knives, tines (2) pick up the plants and carry them through the machine: Tines are free swinging to reduce damage to the conditioner if rocks or other solid objects are struck. 
  2. As the plant passes through, it rubs against the conditioning hood (1) and other plants: Scuffing action removes the waxy surface from the stem of the plant to allow faster evaporation of moisture.
  3. The pivot point for the conditioning hood is also adjustable to provide a wider range of conditioning intensity.
Adjusting impeller speed (shield removed for illustration)Adjusting impeller speed (shield removed for illustration)

The speed at which the tines rotate will also affect the degree of conditioning. Two impeller speeds can be achieved by interchanging the upper sheave and the lower sheave.

  • With the sheaves in the position shown, the impeller turns at 888 rpm; this is ideal for grasses.
  • If the sheaves are reversed, the impeller turns at 615 rpm; this is ideal for legume crops. 
Tractor hookup
8R Tractor front hitch8R Tractor front hitch

The Model 131 Front-Mounted Mower-Conditioner is used to maximize the potential of the 7R or 8R Tractor equipped with a front PTO. This 1000-rpm mower-conditioner can be combined with the following 1000-rpm mower-conditioners to increase productivity:

  • Side-pull mower-conditioner
  • Center-pivot mower-conditioner
  • Twin rear-mounted mower-conditioner

Unmatched productivity is gained with cutting widths up to nearly thirty feet in one pass along with a narrow transport width.

The A-frame adapter enables quick and easy installation of the 131 Front-Mounted Mower-Conditioner. The adapter attaches to the tractor’s front 3-point hitch and locks into the mating headstock that is part of the mower-conditioner.

  • Enables easy attaching/detaching of front-mounted mower-conditioner
  • Mounting position of headstock is adjustable to assure proper clearance for the forming shields

Down stop chains are include for use with tractors, such as the 8R, without front hitch position sensing. A front chain support kit (RE327692) is required to connect the down stop chains on an 8R Tractor.


The 7R Tractors are equipped with position sensing that has the ability to establish front hitch set points from the CommandCenter™. Position sensing will maintain the height of the hitch arms based on the set point.


The front chain support kit (RE327692) is not required for 7R Tractors, but damage to the front PTO driveshaft can occur if the front hitch positioning is not set correctly, or if the set point is manually overridden.

Hydraulic cylinders are used to raise and lower the cutting platform when crossing headlands.

  • Front tractor hitch is not used to raise and lower the cutting platform
  • Uses single-acting selective control valve (SCV) to raise platform.
  • Lift cylinder operation must be independent of the front hitch operation.


Power requirements 131-front-mount-mower-conditioner
Current Model
PTO speed1,000 rpm
HP 540 rpm PTO
HP 1000 rpm 1-3/8 in. PTO75 kW
102 hp
HP 1000 rpm 1-3/4 in. PTO75 kW
102 hp
Powerline type
Hydraulic pressure required
Cutting width3.1 m
10.1 ft
Cutting height30-80 cm
1.2-3.2 in.
Number of disks8
Number of knives16
Disk speed2,986 rpm
Knife tip speed
Disk driveGear
LubricationGL-5 Gear Lubricant
Oil reservoir capacity2.25 L
0.59 U.S. gal.
Cutterbar oil checkFill plug
Cutterbar angleAdjustable
Angle adjustmentTractor center link
Angle range
Cutterbar protectionShear shaft
Adjustable gauge shoes
264 cm
104 in.Number of V-tines
54Number of speeds
Belt and sheavesConditioner hood
Tractor hookup
Standard hitchTractor front hitch
Ball joint equal angle hitch
Rockshaft swivel hitch
Drawbar swivel hitch
Overall widthTransport
3.1 m
10.1 ft
Overall length
WeightWith impeller conditioner
1,255 kg
2,766 lb
Standard tires