In this video, we replace the input shaft, pulley, fan and transmission belt on a Scott S1642 lawn tractor. In my case, the pulley was the most worn component.

Input shaft kit: https://amzn.to/3z1RxXn
Transmission Belt: https://amzn.to/4bV9Z2m
Fan: https://amzn.to/4ekA0d9
Pulley: https://amzn.to/4emRzZU