![]() ![]() IN GENERAL, high VI fluids are not optimum for hydraulic applications when they shear, you lose some of that VI. They have a low VI meaning that temperature control is important. In MY OPINION, the best hydraulic oils are the Mobil DTE20 series. For more information on hydraulic fluid selection, see Sauer-Danfoss publications: 520L0463"Ĭlick to expand.It's very unlikely other things will be equal, but yes, a high VI would be better. These include premium turbine oils, API CD engine oils per SAE J183, M2C33F or G automatic transmission fluids (ATF), Dexron II (ATF) meeting Allison C-3 or Caterpillar T0-2 requirements, and certain specialty agricultural tractor fluids. "Ratings and performance data are based on operating with premium hydraulic fluids containing oxidation, rust, and foam inhibitors. but I figure the tandem pump is the most complex thing in the system, so I looked up info on it (Sauer model 46). I don't know why I didn't think to to this before. I am in the North East (Connecticut) and the machine is just for my around the farm fun work, so I can probably get away with a lighter weight than a machine that is moving asphalt around all day on a construction job.Ī skid steer hydraulic system is pretty straight forward, there really aren't any bearings, gears, etc to deal with except the pump and motors. So SAE rates "engine" oil and "gear" oil differently (brilliant). ![]() I thought I had read that 80W was close to a 10w 30, but then I figured I may have had that wrong. ![]()
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