Hydraulic Fluid Change

[1620compact]

Newbie Just got a 1992 ford 1620 with the HST. Want to change the hydraulic fluid. Do I put the 3pt all the way UP or DOWN? Do I fill the filters before putting them on? Any precautions I should take to prevent air in system? Found out the fluid hasn’t been changed in at least 12yrs. Thanks in advance

 

[LouNY]

Down if you wish to worry about it. Will make a minimal difference in the amount of fluid.
Just be aware that after draining and refilling some machines are a bit of a pain getting circulation established again. It may be worth while to loosen or remove the main line out of the hydraulic pump to allow air to escape.