What Is Total Acid Number (TAN)?
When Oil Becomes the Enemy A maintenance manager reviews the monthly performance report and notices a troubling pattern. Three bearing failures in the last quarter, all on equipment with recent oil changes. Seals were replaced twice on hydraulic systems that passed visual inspection the week before. A gearbox rebuild that wasn't scheduled for another year. The oil looked clean in every case. Filters showed normal pressure drop. The calendar said everything was on track. It turns out the proble
Updated in oct 10, 2025







