Clutch lifespan .....Case 4210

[caseyvand]

A few clutch questions. Is there a inspection port to check clutch wear? I have a Case 4210/ loader (no cab) with about 2200 hours on it and was used primarily for barn yard work. Is there a general rule of thumb used to estimate how long the clutch will last. How expensive a job is it to change a clutch plate?
Thanks.........Casey