The housing part # 1A-1122. Its pretty good size. Rockwood pulley. I think it fits a gas seventy.? It wont fit the sixty or the diesel fifty so you can count those out.
Caleb
That is a correct part number for the seventy belt pulley case.
the gear box maybe cat but the pulley sounds like a replacement. i have rockwoods that fit d4's and d2's. someone may wanted different size that was available from cat. good luck.
That belt pulley will also fit D75 and all of the D8s through 15A. My books don't list a belt pulley for 35A, 36A, 46A.
appriciate the info guys. did a little more research on my own- rockwood pulley was the earlier version G70 and diesel series. the D8's had a steel pulley.😊