Changing Hydraulic Fluid on Massey 492 4WD

[massey492]

I am attempting to change the hydraulic fluid on my MF492. I have the operators manual and it calls for removing the two drain plugs for the hydraulics. I have located them and thats not a problem, however, the 492 is 4WD and the manual says to open the drain plug fitted on the "front axle actioning case". There is a diagram but I can't make heads or tails of it. Any help would be greatly appreciated. Thanks.

 

[J_J]

Not looking at the axle, I would guess that there is a plug in the bottom of the differential, which should be the lowest point of the axle. .