I recently aquired a 1990 JLG 60H that is in pretty good condition however the hydraulics still have the original hydraulic oil. I am not certain but I believe the oil is Kendall Hyken 052 with 50 gallons in the tank and 20 gallons in the system. My first problem is flushing out that 20 gallons that are in the system and the second is finding a good quality fluid that is compatible with Kendall Hyken 052. Any help on either topic would be greatly appreciated.
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