With an average weight per foot of 450 lbs., the 4590 is heavy weight by competitive standards. The 4590 is available in either 8" or 9" spacing with working sizes from 35.5 ft. to 40.5 ft.
 
4590
 4590
4590
 
All 4590 Discs feature a rugged all-welded frame constructed of 4” x 4” high tensile tubing. Critical fore/aft beams on both the main and wide wing frames are doubled for additional strength.
Forward-action wheel legs on the wings promote a level field finish by reducing ridging or gouging in the field. No need to add expensive and troublesome gauge wheels.
Tandem Walking axles are standard equipment on the Model 4590 main frame. Heavier discs such as the 4590 require tandem walking beam axles to provide better weight distribution for more stable and safe transport. Each of the walking beams on the 4590 pivot on two tapered roller bearings for long, trouble-free performance.
A rephrasing hydraulic lift system is standard equipment on all 4590 discs. Depth stop segments c/w holder (main frame lift cylinder only) are supplied with each disc to ensure continuous same-depth tilling. Each of the wing frames can be easily leveled using a conveniently located eye-bolt adjustment. Cylinder arms on each of the rockshafts are equipped with replaceable hardened wear bushings for prolonged trouble free performance.
 
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Slip-in spindles are standard on the 4590 main and wing frame wheels. All spindles are designed for maximum strength and ease of removal. Simple remove one bolt and pull out the axle – a valuable time saving should a tire repair be required.
All 4590 discs fold hydraulically to a transport width of 17’6”. Hydraulic lockout valves are supplied standard to prevent accidental operation of the lift and wing-fold circuits when the disc is being transported.
Staggered overlapping front gangs are standard on all 4590 discs. This feature ensures that the ground is cut cleanly and evenly by the front gangs thereby eliminated ridging problems at the center. Also eliminating is the need for center shank normally supplied with conventional tandem discs.
 
 
SPECIFICATIONS
 
FRAME: 4590 frames are 4” x 4” x .375 wall tubing. Fore/aft beams on main and wing frames are doubled over wheels for additional strength.

GANG BEAMS: Integral to main and wing frames.

HITCH: Free floating design, automatically self-leveling and spring loaded. Adjustable with crank to level disc fore/aft.

GANG ANGLE: Fixed, 20 degrees front and 17 degrees rear.

GANG SHAFT: 1-15/16” diameter, high carbon steel.

SPOOLS: 5” diameter, steel fabricated, squared and beveled.

BLADES: 22”, 24” or 26” available. Notched or plain available.

BEARINGS: 4590 has the 410 Series as standard equipment.

FRONT GANGS: Staggered and overlapping – eliminates need for center shank or blade.

RIGID HANGERS: 4590 hangers are formed 5/8” steel, reinforced for additional strength. The slim line hanger is contoured for maximum trash clearance. All hangers are U-Bolt mounted to the gang beam for ease of adjustment or removal.

STONE-FLEX HANGERS: Optional, 1¼” x 2” formed spring steel.

SCRAPERS: 4” wide, formed carbon steel. U-Bolt mounted to scraper bar for maximum adjustment.

FURROW FILLER BLADES: Integral to rear gangs, four are supplied standard with each disc.

WALKING BEAM AXLES: Standard on 4590 main frame.

SLIP-IN SPINDLE: Standard on all 4590 wheels.

HUBS: Heavy-duty 8 bolt hubs are standard on the 4590 main frame wheels; 6 bolt hubs are standard on wing frame wheels.

TIRES: 11L x 15 tires are standard on all 4590 wheels.