I have a TL2300 which is the same basic animal. The hydro filter is there on the bottom, I believe right side toward the rear side of the engine. It looks like an oil filter. In fact it is right next to the engine oil filter only larger.
The injector pump is on top of the engine towards the side with a bunch of plumbing going in and out. IT DEFINATELY needs to have the fluid checked, changed, a filled on a regular basis. Havent got time to look; but there is an excellent post on here as to how to do that. Search for:
http://www.tractorbynet.com/forums/i...il-change.html http://www.tractorbynet.com/forums/i...ge-clutch.html http://www.tractorbynet.com/forums/i...-pump-oil.html
There is another one but I couldnt find it where a guy took some really good pics of doing this and the 2 bolt looking plugs on the side of the pump..........Good Luck.......Dennis