A closed lubrication or hydraulic system that eliminates the traditional breather cap and includes (1) oxygen absorber that removes oxygen molecules and (2) a desiccant to dry the air that communicates with hydraulic fluid or lubricant in a reservoir. A metallic heat conduction rod is partially exposed to internal air and partly exposed to ambient air. The conduction rod is in close proximity to the oxygen absorber and desiccant in the cartridge. A cool portion on the conduction rod attracts hot humid internal air causing condensation of water near the surface of the conduction rod.