Remove front drive sprocket
look on new Holland parts website. pull axle housing off and sprocket drops off into chain case, then pull out through center side access plate. same as my LS180.
The gear won't fit through access door with the two main drive gears there.
If it is like the 170 you have to remove the drive sprockets and parking brake disk, in the book it says to note which way the hub is positioned. Either long or short side in or out but the drawing shows all the drive guts removed except a splined stub before the sprocket can come out.