I am new to tractors. I bought a used CS2210 with 60 hours on it. I parked it in the garage today and noticed that the lowest hydraulic fitting on the SL2410 loader was leaking pretty badly. It was very loose so I tightened it up and it is still leaking. Is that just an o-ring on the fitting and does anyone have the part number for that so I can get one ordered to replace it.