The Caterpillar 320GC excavator is equipped with a hydraulic main pump that has the following specifications:
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Type: Variable displacement axial piston pump
Maximum flow: 296 L/min (78 gallons/min)
Maximum pressure: 35 MPa (5,076 psi)
Number of pistons: 9
Displacement per revolution: 126 cc (7.7 cubic inches)
Rotation: Clockwise (viewed from shaft end)