Curious if anyone knows if the diff oil and oil that runs hydro is joined. I’ve noticed two filters under the cab and one filter right behind the cab, I see a place to put oil in right at the top of the 3 point, there is also a sight glass beside the PTO, when I remove the plug where it the hydro oil goes I see it moving but I do not see any in the sight glass down below. Thank you for your help!