I have a 1999 robex 55-3 excavator that I want to do a hydraulic oil change. It list the oil type as sae 10w20 which I cross referenced as iso 32 but I'm not 100% sure its right. I also I'm not sure what zink content would be good.
being a dealer we just use the standard AW46 in all the Hyundia equipment and have never heard anything different