I think that would work. Just unscrew the cap, remove the spring and the little rod inside the damper, turn it upside down, pump it a few times, and when all the fluid has drained out, move on to the filling part. Nice and easy. Just make sure the oil reaches the top of the inner tube. Otherwise you will get false reading level. It's always better to remove excess than not have enough. There are small holes in the inner tube that let the oil seep between the inner/outer tubes.