John Deere 835
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  • Urethane roll conditioner available
    Urethane rollsUrethane rolls

    The 630 and 635 Side-Pull Mower-Conditioners and the 830 and 835 Center-Pivot Mower-Conditioners are available with a urethane roll conditioner.


    The urethane roll conditioner works well in legumes, especially alfalfa, and most all-grass crops.


    In general, roll conditioners are better suited for thick-stemmed, cane-type crops, and crops more than 1.5 m (5 ft) tall.


    Molded urethane rolls are formed by a cool molding process that does not distort or warp the steel core of the roll:

    • This process ensures the rolls are straight and cylindrical, so they can be accurately spaced close together for uniform conditioning along the length of the roll.

    An intermittent recessed cleat design gives more crimping edges for greater pressure per square inch, which results in superior conditioning and faster crop drying.

    Shields removed for illustration purposesShields removed for illustration purposes

    Power is distributed by the platform and conditioner drive gearboxes:

    • Gearbox uses heat-treated, steel-forged spur gears for added strength.
    • Drive gears operate in a sealed environment to prevent excessive wear or contamination.
    • Telescoping drivelines ensure positive drive.
    • Spur gears have two to three teeth intermeshing at all times for a smooth, positive drive.
  • Wide swath kit
    Wide swath kitWide swath kit

    The wide swath kit is a factory-installed option for the 630, 635, 830, and 835 Mower-Conditioner models.

    When equipped with an impeller conditioner the kit consists of a redesigned, base swath board and four (3.0-m [9.8-ft]) or six (3.5-m [11.5-ft]) steel vanes bolted to the bottom of the swath board.

    On roll conditioner machines the kit also comes with a redesigned, base swath board but has six (3.0-m [9.8-ft]) or eight (3.5-m [11.5-ft]) steel vanes.

    When the forming shields are fully open, this kit will increase windrow width up to 25 percent over the base configuration of the machines.

  • Rockshaft swivel hitch and tongue
    Swivel hitchSwivel hitch

    For added maneuverability, the 830 and 835 Mower-Conditioners offer an optional rockshaft swivel hitch. The swivel hitch includes an overrunning clutch behind the primary driveline to enable free rotation of the tractor hookup to make attaching to the tractor easier.


    The swivel hitch is available in 1000 rpm power take-off (PTO) only. It attaches to the lower lift arms of a Category 2 or 3N 3-point hitch with or without quick-hitch.


    This option enables cutting square corners without the need to reposition the platform using tractor hydraulics, as well as making it easier to cut around field obstacles.


    U-joint angles remain constant for reduced driveline noise and vibration in turns. A powerline support cable keeps the driveline out of the dirt when detached from the tractor.


    A parking stand allows quick and easy hookup. A down stop chain is also included to limit travel of the rockshaft to prevent damage to the implement driveline.

  • Equal-angle hitch
    Drawbar equal-angle hitchDrawbar equal-angle hitch
    Drawbar extensionDrawbar extension

    The drawbar equal-angle hitch is optional equipment on the 630 and 635 Mower-Conditioners. This hitch option includes:

    • Ball-joint hitch—to be installed on the mower-conditioner tongue
    • Tractor hookup
    • Drawbar extension—to be installed on tractor drawbar and adjustable with one wrench

    The drawbar equal-angle hitch is designed to be towed by a tractor only, and includes a screw jack and safety chain.


    Turn limiters may be required to prevent powerline damage if the hitch point of the tractor is beyond the rear drive wheels of the tractor.

    1000-rpm overrunning clutch1000-rpm overrunning clutch

    An overrunning clutch is located near the platform gearcase on all models. This design enables free rotation of the tractor hookup to make attaching to the tractor easier.


    On 540-rpm machines (optional on model 630 only), a slip clutch is incorporated into the overrunning clutch to provide protection to the platform. No clutch is required on 1000-rpm machines due to the reduced torque loads.

  • Impeller conditioner
    Impeller conditionerImpeller conditioner

    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:



    1. As hay is cut by rotating knives, tines pick up the plants and carry them through the machine:

    • 33 V-shaped tines are on the 625 MoCo; 45 V-shaped tines are on the 630 and 830 MoCo; and 57 V-shaped tines are on the 635 and 835 MoCo.
    • 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 (A) and other plants:

    • Scuffing action removes the waxy surface from the stem of the plant to allow faster evaporation of moisture.

    Impeller hood crank handleImpeller hood crank handle
    Impeller hood position indicatorImpeller hood position indicator
    • Conditioner hood opening is adjustable to accommodate various crop volumes.
    • Crank handle allows an infinite number of adjustments between the minimum and maximum conditioning levels. The closer the hood is to the tines, the more aggressive the conditioning.
    • Conditioner position indicator provides an easy reference point to control the degree of conditioning.
    630 MoCo (shown with shields removed)630 MoCo (shown with shields removed)

    3. 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 (A), located under the shield, and the lower sheave (B).

    • With the sheaves in the position shown, the impeller turns at 870 rpm; this is ideal for grasses.
    • If the sheaves are reversed, the impeller turns at 630 rpm; this is ideal for legume crops.
  • Windrow formation
    Handle for forming-shield adjustmentHandle for forming-shield adjustment

    Forming shields are easily adjusted to control material flow. This allows the operator to match the windrow width to harvesting requirements.

    Handle for swathboard adjustmentHandle for swathboard adjustment

    A swathboard is in base equipment for additional control of windrow formation.

    The windrow width* is as follows:


    83089 cm to 198 cm (35 in. to 78 in.)
    83599 cm to 238.8 cm (39 in. to 94 in.)

    *Depending on crop conditions.

  • V10 steel roll conditioner
    Close-up of V10 steel conditioning rollsClose-up of V10 steel conditioning rolls

    The V10 steel conditioner rolls feature 10 angled flutes arranged in a chevron, or V-pattern along the length of the steel core.

    Steel rolls offer improved wear life over urethane rolls, particularly in adverse crop conditions.

    Advantages of the V10 conditioner roll over the previous straight flute design are as follows:

    • More crimping edges for improved conditioning
    • Improved feeding
    • Improved windrow formation
  • Rotary disk cutterbar
    Rotary cutterbarRotary cutterbar

    The rotary cutterbar is designed and built by John Deere. Large oval disks with free-swinging knives are used to cut the crop.


    All cutting disks are the same and are computer-designed for improved wear and cutting performance.


    Cutting disks are made of high-strength austempered steel to ensure the steel is thoroughly and evenly tempered for good wear characteristics.


    The disks rotate to give a knife-tip speed of 307 km/h (191 mph) for clean cutting.


    The knives are free-swinging to reduce damage if a solid object is struck, and they are reversible to double the useful life.


    The knives are removed at the front of the cutterbar for convenience.

    Wear caps
    Wear capsWear caps

    Made of austempered heat-treated ductile steel for excellent wear characteristics, wear caps are installed on each end of the cutting disks (except on the end disks where crop accelerators are used) to increase the wear life of the cutting disks and knife-bolt nuts.


    Wear caps are open on the end to prevent debris from packing in close to the nut, making hardware and knives easier to change.

  • Modular-design cutterbar
    Modular cutterbarModular cutterbar

    John Deere's patented design cutterbar is made from individual, diagonal-cut modules.

    Serviceability is easy. Modules can be removed individually while leaving the cutterbar attached to the frame.


    Made of high-strength nodular-iron castings, each module consists of two idler gears and one drive gear. The large-diameter idler gears transmit power from module to module. The idler gears turn at a relatively slow speed for added durability.

    The smaller-diameter pinion drive gear is used only to power the cutting disk. Power is not transmitted from one cutting disk to another except through the large-diameter idler gears.


    The modules are interchangeable. Disk rotation is determined by the position of the quill (A). There is a rubber oil seal between each cutting module.


Impeller Width
236 cm
92.7 in.Diameter
60 cm
23.5 in.Number of V-tines
57Number of speeds
3-V powerband belt and sheavesConditioner hood
Rolls Width
236 cm
92.7 in.Diameter
25.4 cm
10 in.Type of material
Recessed cleatSpeed
644 rpmDrive
Telescoping shaft