Fluid Power Journal

Directional Valve Seals Failing

I was asked to help inspect a 4″ bore, 2″ rod cylinder that had a 40″ stroke and an 8″ stop tube. It had a D05 size mounting pad …

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Cylinder Speeds Up On Its Own

An aluminum mill has a system that pushes a large aluminum ingot from one conveyor to another. The operator complained that the pushing speed kept increasing …

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Drifting and Lurching Cylinder on Food-Processing Equipment

In the food and pharmaceutical processing industries, leaking actuators can contaminate products and increase waste, not to mention the possibility of …

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Intake Filter in a Mansion Elevator

A well-known actor had a small elevator installed in his mansion that sits on top of a Tennessee mountain. He wanted it to lift two people up 20 feet to a …

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Walking Beam Cylinder Drifting Up

A processing plant in Pakistan had a walking-beam system that would move coils of finished product to shipping for processing. Several “pot-belly” …

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Missing Rod Seal Back-up Ring

A casting company had a large heat treat furnace used in its process of making knuckles and suspension components for major automakers. These …

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Overheating of Press with Heated Platen

Click on image to enlarge A small heated platen press for an aerospace parts manufacturer would close and hold pressure for 1 to 3 hours based on the part …

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Steel Mill Accumulator

Years ago we built the complete hydraulic system for a continuous steel caster at a steel producer. The HPU had a 300-gallon reservoir with 6 pumps each driven …

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Gear Pump Load Sense

A hydraulic distributor hired a sales engineer for a new territory they were moving into. The first customer the engineer visited requested a quote on a …

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Aerated Oil on a Log Splitter

I loaned my log splitter to a friend whose tree fell after a storm. The tree was a blue spruce evergreen about 30-ft. tall. It surprised me that the tree’s …

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