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Under the seat.
John deere hy-gard or any good trans. Hydraulic oil
back of tractor below fuel tank.
Go to your John Deere dealer and pay big bucks for their hydrostatic fluid or go almost anywhere else and buy a good quality hydraulic fluid.
Where is the hydraulic fluid drain plug on a John Deere 7410 Tractor
if you are referring to the sight glass when the tractor is running the fluid will not be seen in the glass because it will be in all the hydraulic lines and pumps
I the cab. The transmission fill also supplies all of the hydraulics.
low viscosity Hy-Gard Transmission and Hydraulic Oil
any hydraulic transmission oil such as Hy-tran Case IH or Hy-Gard John Deere
A 2155 w/o 4wd holds 50 qts of hydraulic fluid. A 4wd takes 53.2 qts.
Transmission Oil Low Viscosity HY-GARD® (JDM J20D)
Use any Automatic transmission fluid type F, or use John Deere low viscosity hydraulic fluid