Posted by dej(Jed) on January 13, 2015 at 12:10:26 from (141.189.113.1):
In Reply to: Hydraulic oil smells posted by Geo-TH,In on January 13, 2015 at 11:53:46:
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It sounds like the oil is oxidizing(breaking down). If it holds 6 gallons and you drain out 4 gallons, you have changed 66% of the oil. I would do something like get as much oil drained and replaced as I could. I would also change the filter or filters and operate it for 10 hrs or so and change the filters again. That is probably about the best you can do with a closed system. The oil is breaking down from heat, so a cooler might be a good idea. Also it is probably not the case, but there are soy oils out there that are marketed as hydraulics. These have a low resistance to heat. I assume you have a good oil.
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