Posted by RN on August 04, 2012 at 13:59:19 from (69.21.220.82):
In Reply to: hydraulic oil?? posted by dave2 on August 04, 2012 at 13:23:06:
ATF is not hydraulic fluid- 10 or 20 weight nondetergent oil is close to hydraulic oil- and was JD standard for a long time. Brake fluid is not a good idea for most hydraulic systems- exception for some specialized hydraulics that use brake fluid based fluids, I"ve read of aircraft systems that have used it, some artic equipment. As for the leaky seals possible swell to stop leak?- the ATF stop seal leak additives have been used in some old hydrauic units at times locally, sometimes with a splash of ATF Dextron3, sometimes ATF added to hydraulic reservors, sometimes power steering fluid seal sealer and the units have been used another season or so successfully, slows down leaks on marginal seals. Really worn seals, it"ll get you home with equipment up, 40 weight non-detergent will be slower leak and in summer will flow and with old rawhide seal will help some. I wouldn"t get under anything heavy if the leak was bad on supporting hydraulic cylinder- but corn heads on combine with slight leak and 40 weight added have finish season and the next year before refurbish and not collapsed. RN. .
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