i know one of you guys can help me i know it is not a cat grader but i have four cat tractors d2 d4 d7 and the one i like best a r2. but i might have strayed a little this winter when i bought a allis chalmers modle D grader .Anyways i had it up on blocks to replace the old rotten tires and found out that the right hand drive axel was broke in the housing i guess it runs somthing like a dozer because it has been broke for a long time the old owner must have used it for years like that . Does any one know where i can find parts for this machine.Thanks guys .