2555 hydraulic issue

[BBBBill]

My 2555 Shuttle cab has just short of 50 hours on it. The hydraulics will not lift the front end loader or the bush hog. Fluid levels are correct. The dealer that I purchased from is now out of business and the only other dealers have all but said that they are not interested in working on it. Still under warranty, but I guess I may have to tackle it. Any source of info on the hydraulics? Manuals, etc? I used to build hot rods and have a ton of tools, so I'm not intimidated by a piece of machinery, but I would prefer to have legit info to work from.

Thanks, Bill