Hydraulic system cleanliness is probably the most under estimated important part of a hydraulic system. FKG uses only the best hydraulic oils and fluids such as Shell. We drain, flush, bleed and filter down to 5 microns where a multi-stage flushing process is used. (Multiple flushing with lower grade fluids to clean, and then replacement with higher quality oils), and we also dispose of all oil fluids waste in an environmental friendly manner.