Case IH Heavy-Offset 790 All-purpose, Rigid
Features
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
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
Specifications
| Make | Case IH |
| Model | Heavy-Offset 790 All-purpose, Rigid |
| Disk harrow type, Tandem or Offset | Offset |
| Folding (Multi-Section) or Non-Folding (Single Frame) | Non-Folding |
| Dimensions and Weights | |
| Working width, minimum,ft-in (m) | 11' 5" (3.48) |
| Working width, maximum, ft-in (m) | 19' 9" (6.02) |
| Transport width, minimum, ft-in (m) | 13' 0" (3.96) |
| Transport width, maximum, ft-in (m) | 22' 7" (6.88) |
| Transport height, minimum, ft-in (m) | np |
| Transport height, maximum, ft-in (m) | np |
| Overall length, minimum, ft-in (m) | np |
| Overall length, maximum, ft-in (m) | np |
| Total weight, minimum, lb (kg) | 8,000 (3629) |
| Total weight, maximum, lb (kg) | 10,800 (4900) |
| Sizes available, number of widths | 4 |
| Disk Blades | |
| Disk blade spacing, front, in (mm) | 10.5 (267) |
| Disk blade spacing, rear, in (mm) | 10.5 (267) |
| Disk blade diameter, front, in (mm) | 28 (711) |
| Disk blade diameter, rear, in (mm) | 28 (711) |
| Disk blade thickness, front, in (mm) | 0.256 or 0.315 (6.5 or 8) |
| Disk blade thickness, rear, in (mm) | 0.256 or 0.315 (6.5 or 8) |
| Blade edge profile | Notched |
| Optional blade edge profile | Smooth |
| Blade concavity | np |
| Disk Gang Mounting and Angles | |
| Gang mounting to frame | Fixed |
| Frame left to right flexibility, rigid or flexible | Rigid |
| Front gang angle, degrees | 34 to 46 included angle |
| Rear gang angle, degrees | 34 to 46 included angle |
| Disk Gang Components | |
| Disk bearings | Self-aligning, cartridge type ball bearings |
| Gang arbor bolts, in (mm) | 1.5 (38) square carbon steel |
| Disk spool diameter, in (mm) | 6 (152) |
| Disk blade scraper, type | Spring type, adjustable |
| Wheels and Tires | |
| Transport wheel mounting | Two sets of side-by-side tires with axles on rockshaft wheel arms |
| Transport tires | 12.5L x 15FI |
| Optional transport tires | 31-13.5 x 15 terra rib |
| Wing wheel mounting | np |
| Wing tires | np |
| Hitch | |
| Hookup to tractor, mounted or pull-type | Pull - Type |
| Pull-type hitch fore and aft leveling | Turnbuckle with locking pin |
| Depth and Level Adjustment | |
| Typical operating depth, in (mm) | 11.2 (284) |
| Depth control | Mechanical std / Hydraulic opt |
| Fore/aft leveling | Turnbuckle with locking pin |
| Tractor Power Requirements | |
| Required power, hp/ft (kw/m) | 12 to 17 (29 to 42) |
| Sales Literature | |
| Literature Number | Website 012009 |
| Literature Date | 1/20/2009 |
| Operators or Product Manual | |
| Manual Number | SP-3041-08 |
| Manual Date | 8/1/2008 |
| Manufacturing status | Current |
| First Entry Date | 2007 |
| Revision Date | 7/1/2011 |
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