Troubleshooting Challenge: Accumulator Pre-Charge Changing (.PDF Download)

A farmer in Texas grows mushrooms in an abandoned salt mine. It was surprising to learn how many hydraulic systems they use in the processing of their product. They have a simple hydraulic power unit (HPU) with a piston-type accumulator to supplement pump flow. This feeds a three-stage, single-acting telescopic cylinder to raise large tubs of mushrooms up 30 ft. to a conveyor that then transports them up to the surface for processing...

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