As outlined in For Construction Pros‘ article, “Use Caution Under Pressure,” working with hydraulic systems can pose significant dangers, especially if pressure isn’t relieved properly before maintenance. Scott Kane, global platform manager at Parker Hannifin Corp., explains that while hydraulic injuries are rare, they can be very severe when they occur. This is often due to technicians disconnecting hoses or seals while there’s still pressure in the system, causing hydraulic fluid to spray out at dangerous levels.
Hydraulic systems store tremendous potential energy, with pressures reaching as high as 8,000 psi and temperatures up to 275°F in some cases. The failure of a hose under these conditions can result in severe injuries, including burns from hot fluid. As Raymond Wilkins, chief engineer at Eaton’s Hydraulics Operations, advises, technicians should allow the system to cool before performing any work.
Safety is critical when dealing with hydraulic systems. Repair personnel must be trained in specific hydraulic safety protocols and follow detailed procedures, such as ensuring the machine components are properly blocked and pressure is relieved from the system. Although many hydraulic systems are equipped with counterbalance valves, these are not meant to be lockout devices and should never be relied upon for safety during maintenance.
Technicians should also be vigilant in inspecting hydraulic hoses for signs of wear or damage, such as cracks, kinks, or leaks. Preventive maintenance is key to avoiding accidents, as some hose failures may not be visible until it’s too late. According to Dennis Kemper, an account application engineer at Gates Corp., regular inspection and replacement of worn hoses are essential to maintaining a safe working environment. Hose assemblies don’t last forever and should be part of a consistent preventive maintenance program.
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Article with all rights reserved, courtesy of forconstructionpros.com.