HYDRAULIC RESERVOIRS IN mobile equipment can be prone to corrosion when humid air is drawn in when oil level drops. Once moist air gets into the reservoir, water can condense on the interior walls of the reservoir when the ambient temperature drops. Desiccant breathers can be specified to filter and dry ambient air drawn into the reservoir. However, the desiccant has a finite service life, so if the breather is not changed at recommended intervals, moisture will be drawn in unimpeded.
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