This was the large frame CUT that included the 4600 and the 4700. The medium frame models were the 4200, 4300, and 4400. The small one was the 4100.
Now the large frames are the 4120, 4320, 4520, and 4720.
The 4500 was 39 gross hp, with 33 PTO hp. Weight (field ready) 3450 lb. It is 4 cyl 121 cu. in.