Fluid Power Journal

Oil Rig Top Drive Knocking Noise in the Pump

A drill rig operator was complaining about a knocking noise coming from his top-drive HPU. It controlled a hydraulic motor that drove a winch attached to the …

Mid-Pressure Range Pump

The V40M axial piston pump has been designed for open circuits in mobile machines and has a displacement volume of 2.75 in.3/rev. Its swash plate design allows …

Vacuum Assist to Lift Single-Acting Vertical Hydraulic Cylinders

For discussion purposes, we will assume the cylinder is 4 inches in diameter, the rod is 2 inches in diameter, and all math figured here is approximate. This …

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