Tractor Mac Tune-Up

Tractor Mac is hard at work in the field one day when his engine starts to make a funny noise. It doesnt sound good and it doesnt feel very good either. Tractor Mac is scared that he has to take a trip to Dr. Lou at the tractor hospital but with the help of his animal friends and some other machines who have stopped in for a tune-up he learns that going to the doctor doesnt have to be scary at all.