Thankyou, I do have the manual and because I did not find the answer there I asked for help on this forum. I did not check the fluids before - it is a new machine to me.
My John Deere 410 c 1985 recently had a hydraulic cylinder replaced and the mechanic told me to check the fluid after operating it. There are two dipsticks - the upper one was dry so I added new hydraulic oil. After several gallons and still not seeing anything on the dipstick my friend...