Thanks for the reply,, yes it is the motor to Hydraulic pump belt,, 59.1 in long 1/2 size. I am aware rolling belts are an alignment issue,,,, I have replaced the 3 pulleys,,,, only ones not replaced are the one on the crankshaft, and the hydra pump pulley The pulleys are very deep grooved, so I tried the 5/8 in dia belt,,, looks good when installed,,, but will roll also,,,,,,,,,,,,,,,,,,I did get a new bracket and bushings for the tensioner pulley,, in case it is worn or bent,, looks ok ,,,, this mower ate drive belts soon after being new,,,,, so,, not sure what is going on,,,,