Why You Should Record All Hydraulic Oil Top-Offs

hydraulic oil drumAccording to the National Oceanic and Atmospheric Administration (NOAA), more than 700 million gallons of petroleum products enter the environment each year. Around half of which is through irresponsible and illegal disposal. But hydraulic industry experts estimate that when it comes to hydraulic oil, between 70 and 80 percent of that lost to the environment is through leaks, spills, line breakage, and adaptor failure.

One of my Hydraulics Pro Club members, who is 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 planned hydraulic … continue reading »

Hydraulic Component Repair Using Aftermarket or Non-Genuine Parts

Mvc-385fRepairing a hydraulic component involves reworking or replacing all of the parts necessary to return the component to ‘as new’ condition–in terms of performance and expected service life. In many cases, repairing a hydraulic pump, motor, or cylinder can result in significant savings when compared with the cost of purchasing a new one.

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 a rule, the more expensive the new component is in absolute dollar terms, the more likely it is that a repair … continue reading »

The Effect of Temperature On Static Hydraulic Pressure

rod-seal-dieselIn The Hydraulic Troubleshooting Handbook I lay out a step-by-step SYSTEM for reliable and efficient troubleshooting. But there’s another prerequisite you won’t find in the job description: the ability to educate and convince the most ardent sceptics of your diagnosis – usually engineers with limited hydraulics knowledge. This story, sent to me by Joachim Renner, one of our members from Germany, is a great illustration:

“Our company supplied eight double-acting hydraulic cylinders for an auxiliary function on a tunneling machine. The cylinders had the following dimensions:

Piston diameter 140 mm
Rod diameter 90 mm
Stroke 600 mm

During machine commissioning … continue reading »