Hydraulics At Work http://hydraulicspneumatics.com/blog/26271/feed Brendan Casey is a war-weary and battle-scarred veteran of the hydraulics industry. en How To Connect A Forced Air Heat Exchanger http://hydraulicspneumatics.com/blog/how-connect-forced-air-heat-exchanger <div class="node-body blog-body">A connection issue for forced air heat exchangers, which requires attention during initial installation, relates to whether it is single or double pass. These days, many exchanger cores are designed so that during manufacture, they can be configured as either single or double pass.</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-connect-forced-air-heat-exchanger" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-connect-forced-air-heat-exchanger#comments Hydraulics At Work Tue, 19 May 2015 00:38:00 +0000 32611 at http://hydraulicspneumatics.com How To Size A Hydraulic Oil Cooler http://hydraulicspneumatics.com/blog/how-size-hydraulic-oil-cooler <div class="node-body blog-body">As a means of power transmission, hydraulics has many advantages. But overall efficiency is NOT one of them. A single-reduction gearbox has an efficiency of 98 to 99 percent, double-reduction 96 to 97 percent and triple-reduction 95 percent. A chain drive in good condition has an efficiency of 97 to 98 percent.</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-oil-cooler" target="_blank">read more</a></p> http://hydraulicspneumatics.com/blog/how-size-hydraulic-oil-cooler#comments Hydraulics At Work Tue, 12 May 2015 00:45:00 +0000 32301 at http://hydraulicspneumatics.com 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