How do you replace the idler pulley on a 1995 Ford F-350 7.3L?

To replace the idler pulley on a 1995 Ford F-350 7.3L, first, disconnect the negative battery cable to ensure safety. Then, use a wrench or socket to relieve tension on the serpentine belt by turning the tensioner pulley, allowing you to remove the belt from the idler pulley. Next, unbolt the old idler pulley from its mounting bracket and replace it with a new one, tightening it securely. Finally, reinstall the serpentine belt and reconnect the battery cable.