Hey all,
So I have read allot of info on the forum with regard to using Aeroshell 4, 41 (mil spec 5606) fluids in place of the seastar fluid in your hydraulic steering system. But noticing that they are mineral based and reading that most of the aviation sector is moving away from this fluid and going to synthetic fluids like mil 83282, 87257, was wondering if anyone has tried any of these alternatives in they're steering system? Aeroshell 31 just happend to be particuliar one Shell has manufactured and began using to replace 4 and 41. Any feedback whether you have used it or not would be appreciated, Thanks
Mil-H-5606: Mineral base, flammable, fairly low flashpoint, usable from −65 ?F (−54 ?C) to 275 ?F (135 ?C), red color
Mil-H-83282: Synthetic hydrocarbon base, higher flashpoint, self-extinguishing, backward compatible to -5606, red color, rated to −40 ?F (−40 ?C) degrees.
Mil-H-87257: A development of -83282 fluid to improve its low temperature viscosity.
So I have read allot of info on the forum with regard to using Aeroshell 4, 41 (mil spec 5606) fluids in place of the seastar fluid in your hydraulic steering system. But noticing that they are mineral based and reading that most of the aviation sector is moving away from this fluid and going to synthetic fluids like mil 83282, 87257, was wondering if anyone has tried any of these alternatives in they're steering system? Aeroshell 31 just happend to be particuliar one Shell has manufactured and began using to replace 4 and 41. Any feedback whether you have used it or not would be appreciated, Thanks
Mil-H-5606: Mineral base, flammable, fairly low flashpoint, usable from −65 ?F (−54 ?C) to 275 ?F (135 ?C), red color
Mil-H-83282: Synthetic hydrocarbon base, higher flashpoint, self-extinguishing, backward compatible to -5606, red color, rated to −40 ?F (−40 ?C) degrees.
Mil-H-87257: A development of -83282 fluid to improve its low temperature viscosity.