How do you replace a fan belt on a 550g case dozer?

To replace the fan belt on a Case 550G dozer, first ensure the machine is turned off and safely secured. Locate the tensioner pulley and loosen the tension by adjusting the tensioner or removing the bolt holding it in place. Remove the old fan belt from the pulleys, then route the new belt according to the specified path in the owner's manual. Finally, re-tension the belt properly and check its alignment before starting the dozer.