  (Ref. No: ISB-005) |
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| We invite you to read a very informative article written by P.D. Ayers (Colorado State University Cooperative Extension Agricultural Engineer and Professor, Chemical and Bioresource Engineering) reference No. 5.017 regarding Hydraulic Systems Safety. (follow this link: http://www.colostate.edu/Dept/CoopExt/PUBS/FARMMGT/05017.html) We congratulate Mr. Ayers for taking the time to address this important issue - it seems that we are not alone in bringing hydraulic safety to the forefront. However, there are a few comments that we would like to make regarding the article: In the second paragraph of the article, Mr. Ayers says: "One hazard comes from removing or adjusting components without releasing the pressure." Again, under the sub-heading, "Tips for Safe Operation", he recommends: "Before disconnecting oil lines, relieve all hydraulic pressure and discharge the accumulator (if used)." While these recommends are well-founded, we must remind you that most hydraulic systems, in fact over 99.9%, are not designed to permit the safe release of stored energy. In order to release stored energy, you are compelled to "crack" a connector and exhaust the stored energy to atmosphere. |
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This procedure is contrary to safe hydraulic practices. In fact, it invites the type of injury that Mr. Ayers discusses under sub-heading "Pinhole Leak Injuries." Let us make it very clear, the vast majority of hydraulic systems DO NOT comply with OSHA's standard for lockout with respect to de-energization. It is apparent that the fluid power industry escapes OSHA's scrutiny. While Mr. Ayers is correct in his assessment of hazards associated with hydraulics, and we encourage you to abide by his thoughtful and wise recommendations, please be aware that the ability to de-energize, a hydraulic system and verify that it is in fact de-energized is a luxury that is afforded to a meager handful of persons. |
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