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  9. Heavy-Offset Disk Harrows
Heavy-Offset Disk Harrows

Heavy-Offset Disk Harrows

Case IH Heavy-Offset disk harrows perform an array of soil-conditioning tasks with tough, long-lasting components. Our offset disk harrows can be custom equipped with three disk blade sizes and spacing configurations to easily deep-till stalks and stubble, bury brush and level irrigated fields.

Heavy-Offset Disk Harrows Brochure

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Innovative Design

Innovative Design

Case IH Heavy-Offset 790 disk harrows feature state-of-the-art engineering and construction. The machines offer unmatched ruggedness, dependability and consistent performance over years of use. All models are built with:

  • A mainframe of welded steel tubing
  • Square, steel, arbor bolts
  • Nodular iron spools
  • High-capacity bearings
  • Easy gang adjustments
  • Self-leveling hitch
  • Mechanical depth control

  • Nodular Iron Spools

    Unlike steel-fabricated spools on other brands, Case IH cast nodular iron spools:

    • Resist compression up to 20 tons without loosening blades
    • Add greater blade support with bell-shaped design
    • Provide better residue flow with hourglass middle

  • High-Capacity Bearings

    Flangent and Cushion Gang® bearings feature:

    • Finely ground inner rings
    • Heavy steel sleeves that distribute shock loads along the arbor bolt

    All bearings are:

    • Regreasable for extended life
    • Triple sealed to repel debris and moisture

  • Easy Gang Adjustments

    • Gang angle: Adjustable from 34 – 46 degrees; Adjusts without tools
    • Rear gangs: Adjust laterally to changing field conditions; Line up with front gang furrows as desired
    • Easy-turning crank; Fine-tunes front-to-rear leveling

  • Self-Leveling Hitch

    Self-leveling hitch

    • Exclusive to the Heavy-Offset 790 disk harrows
    • Keeps gangs working at uniform depth from front to rear
    • Transfers weight between tractor and disk
    • Allows even soil penetration on hills

    Spring-cushioned hitch

    • Helps ease blades over obstructions

    Convenient dial

    • Centers disk behind tractor
    • Minimizes draft
    • Adjusts by simply pulling pin and repositioning hitch

  • Mechanical Depth Control

    Mechanical depth control

    • Provides accurate, repeatable depth

    Pin-type adjustment

    • Makes depth control convenient, quick and reliable
    • Eliminates risk of hydraulic leakage affecting disk depths
    • Repeatable accuracy

Earth Metal® Blades for Exceptional Endurance

Earth Metal<sup>® </sup> Blades for Exceptional Endurance

All Case IH Heavy-Offset 790 disk harrows are equipped with Earth Metal blades. Uniquely formed and heat treated, Earth Metal blades offer exceptional endurance and break resistance for longer equipment life. The notched blades aggressively cut residue and vegetation with excellent cut uniformity.

  • Self-Sharpening

    Earth Metal® blades actually resharpen as they wear.

    • Provides superior cutting performance over an extended blade life
    • Helps prevent down time and maintenance labor
    • Lowers blade replacement cost

    The performance of Earth Metal blades actually improves as they are used, while conventional blades lose their sharpness with wear.

  • Long-Life Durability

    Compared to conventional blades under identical conditions, Earth Metal® blades:

    • Are 30% stronger
    • Last up to 20% longer
    • Resist stress fractures
    • Feature shallow-concavity design for easier pulling than conical or spherical blades and promotes better fuel economy

Flexible Options to Tackle Tough Soil Conditions

  • Simple Set Up and Adjustment

    • Easy-to-adjust leveling turnbuckle; optional hydraulic leveling
    • One-step lateral pin adjustment for tongue placement maintains draft compliance
    • Positive mechanical depth control with stop collars; optional single-point hydraulic control
    • Transport lock U-channels and rear chain attaching points

  • Options for Varied Conditions

    All Heavy-Offset 790 disk harrows come with the following options:

    • Furrow fillers for smooth soil surface and to allow for uniform chemical incorporation
    • 31×31.5;15 terra rib tires provide additional flotation
    • Rear hitch to attach Crumbler®​ 160 or other soil conditioner​

Crumbler® 160 Seedbed Conditioner

  • Proven Performance

    The Crumber® breaks up clods, knocks soil off crown roots and smoothes soil after primary tillage; saves time, fuel and tractor engine hours; and promotes higher yields by creating more ideal seedbed conditions. Performance research shows that the Crumbler 160 works in the fall to provide high-quality seedbed conditions by:

    • Reducing clod size by up to 46%
    • Creating smoother valleys by up to 45%
    • Improving fall seedbed levelness by up to 55%
    • Reducing air pockets in tilled soil

    The Crumbler®​​ 160 consistently exerts approximately 160 lbs/ft (240 kg/m) of ground pressure. ​​​​

  • Heavy-Duty Construction

    The Crumbler® ​160 is constructed with rough terrain and varied soil conditions in mind.

    • Mainframe and wings constructed of 6 x 4 in (152 x 102 mm) steel tubing
    • 16 in (41 cm) diameter reels with 10 1 in. (25 mm) diameter solid bars
    • 3,000 psi (211 kg/cu cm) hydraulic cylinders and hoses with ISO couplers
    • 9.5L x 15 eight-ply, tubeless-rim implement tires
    • Replaceable hubs and spindles
    • Large, heavy bearings
    • Rigidly mounted reels
    • Available in 15, 17.5, 20, 22.5 and 25 ft (4.6, 5.3, 6.1, 6.9 and 7.6 m) widths. The four larger models fold to a narrow 13.5 ft (4.1 m) transfer width.​

  • Unique Features

    Other unique features of the Crumbler®​ 160 include:

    • A pull frame with telescoping tongue that easily attaches to the rear hitch on primary tillage machines
    • Warning and tail lights
    • An SMV emblem
    • A safety chain
    • A parking stand​
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