I have a 490 I think 1985 year.I have a leak hydraulic leak.I removed the inspection plate in front of the boom. filled with fluid. I think the rotary manifold is the problem. What is the easiest way to remove. I see that it is attached on the top by a bar I see the bolts on bottom side. I know all the hoses have to be removed and marked. Do I remove the hoses in front for the boom to get to the manifold. there seams to be no easy route to get to any thing. the rubber bushing ( for lack of a better word) that seals water from the top down . Will that clear all the connection on the side of the manifold when it is lowered down any help would be great Thank you