Did read the manual that is why I am here. This is a 1990 machine and the hydraulic fluid recommended is no longer available. Reason for changing is that I know the fluid is at least 25 years old and I suspect the protection package of the oil is low. The plus side is there is no known...
I just acquired a 1990 JLG 60H man lift with unknown hydraulic fluid which needs to be changed. Is there someway to determine what kind of hydraulic fluid is in the machine? If not, is there a brand that is compatible with unknown fluid? The machine has a 50 gallon tank plus another 20...