Use any Automatic Transmission Fluid type F, or use JOHN DEERe low viscosity hydraulic fluid
Low Viscosity Hy-Gard is what John Deere recommends and sells for this application. It is a all weatherhydro-staticfluid that meets the JDM J21A requirements.
1995
John Deere 450H Dozer hydralic transmission how can drain
John Deere does not advise changing trans fluid on the lx176 for two (2) reasons. (1) The possibility of contaminants getting in the resevoir. (2) The system has to be burped(bleeded) like you would car brakes. If you are unfimiliar with this process, you could be left with an immovable tractor or a substantial cost from a dealer to correct the problem. You are better off just topping off with wd10x30 motor oil.
what type of fluid does a john deere transmission transfer case use
Hydrostat Fluid
type F
John deere hy-gard or any good trans. Hydraulic oil
John Deere all-weather hydrostatic fluid or an equivalent type "F" automatic transmission fluid
Under fan
7.2 quarts
you can not fill the transmission on a JD 155c, it is sealed.