Most Recent Blog Posts

May 02, 2016

Why You Should Record All Hydraulic Oil Top-Offs

A maintenance planner for a large coal mine, recently told me his mine purchased 447,000 liters of hydraulic oil last year. It's hard to believe....More
Apr 25, 2016

Hydraulic Component Repair Using Aftermarket or Non-Genuine Parts

The economics of proceeding with any hydraulic repair is ultimately dependent on the cost of the repair, relative to the cost of a new component. As....More
Apr 18, 2016

The Effect of Temperature On Static Hydraulic Pressure

In 'The Hydraulic Troubleshooting Handbook' I lay out a step-by-step SYSTEM for reliable and efficient troubleshooting. But there's another....More
Apr 11, 2016

How NOT To Go Down The WRONG Rabbit Hole When Hydraulic Troubleshooting

If you'd like a little challenge, take a moment to consider the problem described below and jot down how would proceed, and why....More
Apr 04, 2016

How To Deal With Air In Hydraulic Oil

Contaminants of hydraulic oil are broadly defined as any substance that impairs the proper functioning of the fluid. Air fits this definition and....More
Mar 28, 2016

The Trouble With Hydraulics Troubleshooting

Hydraulics system knowledge is a great advantage when troubleshooting. But without a reliable process, it's very easy for the troubleshooting effort....More
Mar 21, 2016

The One Type Of Hydraulic System You Do Not Want!

With hydraulics, like most other things, you get what you pay for. Design on price alone (especially if you don't know what you're doing) and you'll....More
Mar 14, 2016

Straight Talk About Bent Hydraulic Cylinder Rods

Checking rod straightness is an essential task when repairing any hydraulic cylinder. Because if a bent rod gets put back in, the life of the rod....More
Mar 07, 2016

How To Avoid Hydraulic Failures Resulting From Memory Lapse

Fitters on a mine-site changing out a main pump on an O....More
Feb 29, 2016

One Important Fact About Hydraulic Spool Valves

Because radial clearance is required for the spool to slide in its bore, this valve design is not leak free. To say this another way, even when a....More
Feb 22, 2016

How To Troubleshoot Hydraulic Cylinder Drift

A popular misconception about hydraulic cylinders is that if the piston seal is leaking, the cylinder will drift down. Fact is, if the piston seal is....More
Feb 15, 2016

Hydraulic Motor 'Dry Starts' And How To Avoid Them

A common misconception among maintenance personnel with limited training in hydraulics, is that because oil circulates through hydraulic components....More
Feb 08, 2016

An Unusual Hydraulic Pump Problem

It was early in the afternoon when I got the call requesting I go to site to supervise start-up of a recently overhauled hydraulic system. Thinking....More
Feb 02, 2016

How To Test A Hydraulic Cylinder

The conventional way of testing the integrity of the piston seal in a double-acting cylinder is to pressurize the cylinder at the end of stroke and....More
Jan 25, 2016

Pressure Intensification In Hydraulic Cylinders

There is a simple bench-test for testing the integrity of the piston seal in a double-acting cylinder. But it involves the intensification of....More
What's Hydraulics At Work?

Brendan Casey is a war-weary and battle-scarred veteran of the hydraulics industry.

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