Case 580K Backhoe Specifications

Hydraulic System Area

Improved Hydraulic System Flow

The 580K hydraulic-system oil is supplied by 7-gallon-per-minute (26 L/min) and 26-gallon-per-minute (98 L/min) engine-driven tandem-gear pump sections.

The smaller pump supplies oil directly to the backhoe boom, stabilizer, dipper and bucket circuits.

The larger pump supplies oil to steering, loader and backhoe circuits.

With this split hydraulic circuit, the swing and other major backhoe functions can be operated simultaneously for improved cycle times and performance without having to feather the controls.

Increased Loader-Pump Capacity

Capacity of the 580K loader pump has increased from 23 gallons per minute (87 L/min) to 26 gallons per minute (98 L/min) at 2200 rpm, a 13-percent increase.

Increased Backhoe-Pump Capacity

The combined pump flow at the backhoe has increased 10 percent, from 30 gallons per minute (114 L/min) to 33 gallons per minute (125 L/min) at 2200 rpm.

Increased Main Relief Pressure

The 580K hydraulic-system main relief pressure has increased from 2450 psi (16 892 kPa) to 2550 psi (17 582 kPa), a four-percent increase. Improved serviceability comes from one main relief valve, instead of two, to protect both pump sections.

Cast-Iron Hydraulic Pump

For improved life and reliability, the 580K features a Commercial Shearing-built, cast-iron, tandem-gear pump, rated at 3500 psi (24 132 kPa).

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