FYI, On my brand-new MT225s I could read the OEM hydraulic suction filter's labeling through the black paint. It's a Zinga AE-25. Available on Surplus center for less than $8. Funny that a Korean made tractor comes with a American made filter.
We are totally enjoying the MT225s, it is a awsome tool. One little problem was the parking brake lever - the tab that engages the ratchet was weak and would bend, so I welded on some tabs to box it up and make it stronger. Other than that, it's a very solid and capable machine.
One of the backhoe fittings was loose, and leaked (the top one), so I had to replace the fluid lost. I used the Traveller Premium fluid from TS, which works fine. I got a kit of filters off Ebay (search for MT225s filter kit), they seem to work fine, except it didn't come with the hydraulic pressure filter. I'll have to get that one from the dealer until we figure out what it is.