Fluid Power Journal

Pressure-reducing Valve Would Not Reduce the Pressure

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A steel processor had purchased a used machine …

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Noisy Pump Causing Foam to Escape Through the Filler Breather

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training I was called to troubleshoot a foaming problem …

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New Problem: Ink Mixing Machine Speed Problems

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training A large OEM ink manufacturer of various printer …

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Piston Pump Keeps Failing on a Large Shear

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training   The piston pump that provides flow to two …

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Steel Scrap Compactor Eject Cylinder Running Slow

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training We received a call from a stamping company …

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Concrete Truck Hydrostatic System Overheats When Carrying a Full Load

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training When I had my hydraulic repair shop several …

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Injection Molding Machine Not Up To Speed

  I was asked to help a student of ours with an injection molding machine that had trouble with the Extruder/Injection unit motor running slow. They …

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Rotating Stage’s Hydraulic Motor Keeps Leaking

A large entertainment stage is rotated by a Geroler type hydraulic motor shown on the circuit. The regenerative center position on the directional valve …

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Oil-heater Problems with a Hydraulic Power Unit (HPU) Located in an Unheated Shed

A metal fabrication shop has a 30-year-old bending press that can bend wide flange beams to a semi-circular shape. The machine was up-graded to bend larger …

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Clamp and Drill Circuit Will Not Release the Part

A new hydraulic system was installed on an old “Clamp and Drill” machine. A PLC would shift a directional valve clamping the part and a proximity switch …

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