Maintenance RD 12A62 wc_tx001557gb.fm5.10 Hydraulic System CleanlinessKeeping the hydraulic oil clean is a vital factor affecting the service lifeof hydraulic components. Oil in hydraulic systems is used not only totransfer power, but also to lubricate the hydraulic components used inthe system. Keeping the hydraulic system clean will help avoid costlydowntime and repairs.Major sources of hydraulic system contamination include:• Particles of dirt introduced when the hydraulic system is openedfor maintenance or repair• Contaminants generated by the mechanical components of thesystem during operation• Improper storage and handling of hydraulic oil• Use of the wrong type of hydraulic oil• Leakage in lines and fittingsTo minimize hydraulic oil contamination:CLEAN hydraulic connections before opening the lines. When addingoil, clean the hydraulic tank filler cap and surrounding area beforeremoving it.AVOID opening the pumps, motors, or hose connections unlessabsolutely necessary.PLUG or cap all open hydraulic connections while servicing thesystem.CLEAN and cover the containers, funnels, and spouts used to storeand transfer the hydraulic oil.CHANGE the hydraulic filters and oils at the recommended serviceintervals.
