Issue link: http://read.dmtmag.com/i/250939
C2 Hydraulic Fluids 1 800 255 4417 www.castroldiesel.com/GPS Industry Specifications Performance standards for anti-wear hydraulic fluids are set primarily by original equipment manufacturers. Unlike engine oils, anti-wear hydraulic oils do not have an industry licensing procedure. Therefore, anti-wear hydraulic fluid users must seek out information on test results from the oil manufacturer itself. Without a standard industry licensing program, it is worthwhile for users to research hydraulic fluid choices carefully. In the recent past, there have been OEM and industry trends that have forced changes in hydraulic fluid formulation. Below is a list of the formulation changes and the reason each was needed: • mproved oxidation stability to accommodate higher operating temperatures. I • mproved air release, foam control and water separation to handle smaller reservoirs and I reduced cycle times. • mproved dry/wet filterability due to reduced filter pore size and tolerance to water I contamination. • Better hydrolytic stability to handle water contamination. • Extended pump life to meet Denison T6HZOC pump performance. • ncreased drain intervals requiring the lubricants to retain original performance longer. I Importance of Oxidation Tests When selecting a hydraulic fluid, resistance to oxidation is a key component of performance. The ability to protect against oxidation in the oil prevents premature oil thickening, sludging, and other critical lubrication failures. Good oxidation protection comes from the combination of base oil selection and quality of the additives. Types of oxidation tests include: Turbine Oil Oxidation Test (ASTM D 943) This test measures the oil's ability to prevent oxidation and the formation of destructive acids. To pass HF-O, the oil's acidity level must not exceed 2.0 mgKOH/g after 1500 hours. Test Criteria Time to 2.0 TAN, hours 1,500 min Rotary Pressure Vessel Oxidation (ASTM D 2272) This test utilities an oxygen pressurized vessel to evaluate oxidation stability of lubricants in the presence of water and copper @150°C/302°F. FIELD TESTED. FLEET TRUSTED. Test Criteria Time to 25-psi loss in minutes GPS-2014-1 © 2014 Wakefield Canada Inc. HF-O, HF-2 1500