Should use jack oil, but you can use transmission fluid if you have to. 10W motor oil works also.
Hydraulic Jack oil
Use "Hydraulic Jack Oil" only
Use Hydraulic jack oil only-- specifically designed for this purpose
These jacks generally use hydraulic oil to operate the hydraulic system. There are a number of different types of oil for these jacks, but they are so similar that they are often marketed as "hydraulic jack oil" and there is little to no differentiation.
Hydraulic jack oil Available at auto parts store or Wal-Mart Use AW68 grade hydraulic oil
designed for hydraulic jack perhaps power steering fluid would work Brake fluid Ruins pump
Make sure piston is fully retracted into body of jack should be a screw on side body of jack Use hydraulic jack oil and fill to this level only
No. Only hydraulic oil can be used in hydraulic jacks. Hydraulic oil is compressed (a requirement for use in hydraulic cylinders) so that there are no air or other gases dissolved in it. Before adding hydraulic fluid to the jack, be certain that the fluid has been sitting for at least 24 hours to avoid introducing air into the hydraulic fluid in the chamber.You should be able to purchase hydraulic oil (sometimes it will be labeled "Hydraulic Jack Oil/Fluid or Jack Oil/Fluid) in small or large quantities, inexpensively, at any auto parts store worthy of the name. It can also be purchased at some Walmarts and any heavy equipment supply stores.
servo system 68
10-30 motor oil with HTO additive
The owner's manual for Oakes Man. L600 recommends using SAE30 motor oil in the chain cases.