Hello, First of all i'm new to the forum. Looking forward to meet all the nice people here Can some one share advice on the best approach to completely flush the hydraulic fluid from a Hyundai Robex 320LC-7 and Hitachi Zaxis 280LC3. The reason why i would like to flush the oil is because they where both field with the wrong grade of oil :Banghead and its causing the hydraulic oil to heat up because of its low viscosity. draining the oil tank reservoir will not be enough as there will still be over a 100L of oil in the system. Thanks in advance. Regards, H.J.
If it's got 32 in it and it's supposed to have 46, fill with 68 and the mix should be about right? Just a thought. you can always empty the tank, then pull a vacuum on it and start breaking connections on the lines, you'll never get all of it though.
So long as the "wrong" oil that's in there now is actually a hydraulic oil that will work.