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Improved Hydraulic Pump Outlet Hoses
For longer life and improved reliability, high-impulse hoses with a 3,000 psi (20 684 kPa) and 3,500 psi (24 131 kPa) maximum operating pressure are now used as the 7-gallon-per-minute (26 L/min) and 26-gallon-per-minute (98 L/min) hydraulic pump outlet hoses, respectively. They replace 2250 psi (15 513 kPa) hoses on the 580SE.
Bolt-on Split Flanges
For improved serviceability and protection against leaks, bolt-on split flanges are used to connect the hydraulic pump outlet hoses.
Loader
Heavier Hydraulic Cylinder Walls
The thickness of the loader cylinder walls has been increased 33 percent from 3/16 inch (4.8 mm) to 1/4 inch (6.4 mm) for a longer, more durable life and to handle the higher operating pressure.
Heavy-Duty Loader Arms
For improved durability and performance, the 580K loader arms are made of thicker steel and have a larger cross section. Large reinforcement plates on both sides of the arms between the lift cylinder mounting and cross tube also add increased strength. The integral fabricated-steel mounting end of the arms gives improved strength.
Larger Loader Cylinders
The bore diameter of the lift cylinders has been increased 0.25 inches (6.4 mm) to 3.25 inches (82.6 mm) and the bucket cylinder bore is increased 0.5 inches (12.7 mm) to 3.0 inches (76.2 mm) for improved performance.
 

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