Is it common for the belt to eat into the tensioner arm? The arm on the tensioner looks to be leaning in towards the engine which is causing the belt to rub against it. Mine only has 173,000 miles on it. I decided to get anotherone anyway so I got lucky and found a heavy equipment dealer that deals with cummins parts and am picking one up soon (part #3912254) for $80. 00. Dodge wants anywhere from $145-160. 
