Hydraulics At Work http://hydraulicspneumatics.com/blog/26271/feed en A Problem With Hydraulics At High Altitude http://hydraulicspneumatics.com/blog/problem-hydraulics-high-altitude <div class="node-body blog-body">At 3000 ft, air only has 90% of its sea level density. So a fixed-speed cooling fan will move the same volume of air but at only 90% of the mass. And it's the air mass that removes heat from the hydraulic oil heat exchanger. The heat transfer coefficient of this thinner air is lower too. This means the heat exchanger may be only 75-80% as effective as it would be at sea level.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/problem-hydraulics-high-altitude" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/problem-hydraulics-high-altitude#comments Hydraulics At Work Tue, 05 May 2015 00:45:00 +0000 32221 at http://hydraulicspneumatics.com Predictive Hydraulics Maintenance 101 http://hydraulicspneumatics.com/blog/predictive-hydraulics-maintenance-101 <div class="node-body blog-body">In the appendix of Reliability-Centered Maintenance II, John Moubray lists 102 proactive maintenance techniques in six categories. And new predictive techniques are being devised or invented all the time. But as Joel Levitt points out in his book Complete Guide to Preventative and Predictive Maintenance, the most fundamental of all predictive maintenance techniques is the visual inspection.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/predictive-hydraulics-maintenance-101" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/predictive-hydraulics-maintenance-101#comments Hydraulics At Work Tue, 28 Apr 2015 00:40:00 +0000 32191 at http://hydraulicspneumatics.com A BIG Troubleshooting Secret: Principles Before Methods http://hydraulicspneumatics.com/blog/big-troubleshooting-secret-principles-methods <div class="node-body blog-body">Ralph Waldo Emerson once said: "As to methods there may be a million and then some, but principles are few. The man who grasps principles can successfully select his own methods. The man who tries methods, ignoring principles, is sure to have trouble."</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/big-troubleshooting-secret-principles-methods" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/big-troubleshooting-secret-principles-methods#comments Hydraulics At Work Tue, 21 Apr 2015 00:33:00 +0000 32151 at http://hydraulicspneumatics.com The Hydraulic Maintenance Dilemma: Not Deciding Has Consequences http://hydraulicspneumatics.com/blog/hydraulic-maintenance-dilemma-not-deciding-has-consequences <div class="node-body blog-body">In the hydraulic maintenance biz, there are always decisions waiting to be made. What type of oil to use. A planned change-out to call. Which proactive maintenance tasks to do on what machines and when. A component to be declared faulty and so on. Often such decisions must be made in the absence of perfect information, or worse, in the presence of conflicting information.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/hydraulic-maintenance-dilemma-not-deciding-has-consequences" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/hydraulic-maintenance-dilemma-not-deciding-has-consequences#comments Hydraulics At Work Wed, 15 Apr 2015 00:32:00 +0000 31901 at http://hydraulicspneumatics.com From The Go-To Guy's Creed: Whatever It Takes http://hydraulicspneumatics.com/blog/go-guys-creed-whatever-it-takes <div class="node-body blog-body">Back in 1991, the hydraulics company I was working for had supplied conversion kits to change the hydraulic piston pump on an ROV (remotely operated [submersible] vehicle) from an obsolete brand to Linde. The kits had been supplied as an in-field replacement, so that the changeover could be done when necessary. In other words, when the existing hydraulic pump failed. The time came of course for the first of these kits to be installed in anger...</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/go-guys-creed-whatever-it-takes" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/go-guys-creed-whatever-it-takes#comments Hydraulics At Work Tue, 07 Apr 2015 00:32:00 +0000 31771 at http://hydraulicspneumatics.com The 2 Hydraulic Oil Sample Points That Matter http://hydraulicspneumatics.com/blog/2-hydraulic-oil-sample-points-matter <div class="node-body blog-body">From a predictive maintenance perspective, there is little real benefit from taking an oil sample directly from the hydraulic tank. </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/2-hydraulic-oil-sample-points-matter" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/2-hydraulic-oil-sample-points-matter#comments Hydraulics At Work Tue, 31 Mar 2015 01:14:00 +0000 31751 at http://hydraulicspneumatics.com How To Size A Hydraulic Tank http://hydraulicspneumatics.com/blog/how-size-hydraulic-tank <div class="node-body blog-body">The rules of thumb for reservoir size differ for open and closed circuits. For a conventional reservoir used in open circuits the general rule is a tank oil capacity of 3 to 5 times the flow of the pump(s) per minute plus a 10 percent air cushion. For HFC and HFD fire-resistant fluids the general rule is 5 to 8 times pump flow per minute.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/how-size-hydraulic-tank" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-size-hydraulic-tank#comments Hydraulics At Work Tue, 24 Mar 2015 01:28:00 +0000 31711 at http://hydraulicspneumatics.com How To Determine Hydraulic Pump Condition Using Volumetric Efficiency http://hydraulicspneumatics.com/blog/how-determine-hydraulic-pump-condition-using-volumetric-efficiency <div class="node-body blog-body">In a condition-based maintenance environment, the decision to change-out the pump is usually based on remaining bearing life or deterioration in volumetric efficiency, whichever occurs first. </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/how-determine-hydraulic-pump-condition-using-volumetric-efficiency" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-determine-hydraulic-pump-condition-using-volumetric-efficiency#comments Hydraulics At Work Tue, 17 Mar 2015 01:21:00 +0000 31551 at http://hydraulicspneumatics.com Why Solenoid Coils on Hydraulic Valves Burn-Out http://hydraulicspneumatics.com/blog/why-solenoid-coils-hydraulic-valves-burn-out <div class="node-body blog-body">The high current draw of an open AC solenoid is known as inrush current. And the current draw when the solenoid is closed is called holding current. AC solenoids can only dissipate the heat generated by their holding current. This means it's very important for the plunger to close completely when an AC solenoid is energized, otherwise the coil will burn out.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/why-solenoid-coils-hydraulic-valves-burn-out" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/why-solenoid-coils-hydraulic-valves-burn-out#comments Hydraulics At Work Tue, 10 Mar 2015 01:05:00 +0000 31191 at http://hydraulicspneumatics.com A Troubleshooting Lesson From The 'Coal Face' http://hydraulicspneumatics.com/blog/troubleshooting-lesson-coal-face <div class="node-body blog-body">When faced with a problem there's a natural tendency to assume a serious or complex fault is the cause. But the statistical reality is the opposite is more likely to be true. </div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/troubleshooting-lesson-coal-face" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/troubleshooting-lesson-coal-face#comments Hydraulics At Work Tue, 03 Mar 2015 00:45:00 +0000 31151 at http://hydraulicspneumatics.com Who Fixed YOUR Bicycle? http://hydraulicspneumatics.com/blog/who-fixed-your-bicycle <div class="node-body blog-body">We live in a throw away society these days. Made possible by the rise and rise of cheap manufacturing, mainly out of China. When I was a kid, a kid's bike was relatively expensive. If it broke you weren't getting a new one in a hurry. So you either walked or figured out how to fix it. In other words, you had an incentive to become a bike mechanic. Not so these days; kid's bikes are as cheap as chips. And this of course skews the economics of repair versus replacement.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/who-fixed-your-bicycle" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/who-fixed-your-bicycle#comments Hydraulics At Work Tue, 24 Feb 2015 00:45:00 +0000 31141 at http://hydraulicspneumatics.com Eliminate Those Hydraulic Oil Leaks http://hydraulicspneumatics.com/blog/eliminate-those-hydraulic-oil-leaks <div class="node-body blog-body">Taking steps to prevent leaks not only drastically cuts oil costs and consumption, it’s an environmental imperative—one liter of leaked oil potentially pollutes up to one million liters of water.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/eliminate-those-hydraulic-oil-leaks" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/eliminate-those-hydraulic-oil-leaks#comments Hydraulics Hydraulics At Work Wed, 18 Feb 2015 20:59:00 +0000 31101 at http://hydraulicspneumatics.com How Efficient Are YOUR Hydraulic Machines? http://hydraulicspneumatics.com/blog/how-efficient-are-your-hydraulic-machines <div class="node-body blog-body">There's no escaping the fact that industry is a huge consumer of energy. If peak oil and global warming are real issues -- and there's a growing body of evidence to suggest they are, then I predict energy management will become a major issue for industry over the next decade and beyond. And a large part of this burden will fall on machine designers.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/how-efficient-are-your-hydraulic-machines" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-efficient-are-your-hydraulic-machines#comments Hydraulics At Work Tue, 17 Feb 2015 00:40:00 +0000 30881 at http://hydraulicspneumatics.com Which Hydraulic Fluid Should You Use? http://hydraulicspneumatics.com/blog/which-hydraulic-fluid-should-you-use <div class="node-body blog-body">Most hydraulic systems will operate satisfactorily using a variety of fluids. These include engine oil, automatic transmission fluid and oil formulated specifically for the hydraulic compartment. But which type of fluid is best for a particular application? While it is not possible to make one, definitive recommendation that covers all types of hydraulic equipment in all applications, the following are some of the factors that need to be considered when selecting (or changing) a hydraulic fluid.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/which-hydraulic-fluid-should-you-use" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/which-hydraulic-fluid-should-you-use#comments Hydraulics At Work Tue, 10 Feb 2015 00:37:00 +0000 30841 at http://hydraulicspneumatics.com How To Calculate Hydraulic Pump and Motor Efficiency http://hydraulicspneumatics.com/blog/how-calculate-hydraulic-pump-and-motor-efficiency <div class="node-body blog-body">Despite recent advances in predictive maintenance technologies, the maintenance professional's ability to determine the remaining bearing life of a pump or motor, with a high degree of accuracy, remains elusive.</div> <div class="og_rss_groups"><ul class="links"><li class="og_links first last"><a href="/blog/hydraulics-work">Hydraulics At Work</a></li> </ul></div><p><a href="http://hydraulicspneumatics.com/blog/how-calculate-hydraulic-pump-and-motor-efficiency" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-calculate-hydraulic-pump-and-motor-efficiency#comments Hydraulics At Work Tue, 03 Feb 2015 01:07:00 +0000 30601 at http://hydraulicspneumatics.com