![]() ![]() ![]() ![]() This can worsen your heat problem when your machines experience higher ambient temperatures. So, any hydraulic systems with low efficiency continuously generate heat and may require heat exchangers.If you are using heat exchangers with your systems, be sure that they are not too small for the job. One way to keep temperatures in a fluid power system from creeping higher is to ensure that you are using the right oil in the system.įew hydraulic systems have an overall efficiency greater than 85-90%, with lower-efficiency systems generating more heat. This means that you must have adequate cooling processes in place before warmer weather arrives, rather than waiting for the onset of the warm season. Keep it Cool by Controlling TemperatureOne way to help your hydraulic fluid system cope with warm weather is to control your oil’s operating temperature. If the load on the hydraulic system remains the same, but higher operating temperatures reduce oil viscosity below the needs of your equipment, the chances of increased friction, abrasion, and adhesive wear rise. Low oil viscosity causes loss of lubricating film strength. This lowers its ability to reduce heat and part-wearing friction. The viscosity of petroleum-based hydraulic oil lessens as temperature increases. It’s Important to Understand ViscosityBe sure to read and understand your oil’s viscosity chart to understand how the oil viscosity changes at different operating temperatures. In this article, you’ll find information and preparation advice to help you understand and mitigate the effects of heat on hydraulic fluid. While cold weather is to blame for some fluid power system failures, warm weather has its own drawbacks.By understanding how heat effects a fluid power system, and preparing your fluid power systems for the summer season, you reduce risks to your hydraulic equipment that can result in costly shutdowns and increased maintenance demand. It is a NATO Code Number H-515 fluid.As summer heats up large facilities, companies that use fluid power systems should take steps to ensure their fluid power equipment is equipped to cope with rising temperatures. It is intended primarily for military aircraft, but it is also used as a hydraulic fluid for small private and commercial aircraft, and as a strut fluid in landing gear of large commercial aircraft. It has physical properties very similar to Mobil Aero HFA, and also meets "super-clean" requirements required by modern aircraft hydraulic systems. Mobil Aero HF is a premium quality fluid that is approved against the most current version of U.S. It is also used in industrial and commercial equipment requiring good fluidity at very low temperatures, where Mobil Aero HFA provides long, trouble-free service over a wide range of operating conditions. Military, it is still used in some older, small private, and commercial aircraft. While this quality fluid is no longer used by the U.S. It has a very high VI and is suitable for use at temperatures down to -54 ✬ (-65 ✯). Military specification MIL-H-5606A (now obsolete). Mobil Aero HFA is a premium quality fluid that meets the quality requirements of the U.S. ![]()
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