Petticoat Junction - "Is There a Doctor in the Roundhouse?" (1963)

The Shady Rest's Annual Jamboree is threatened when railroad CEO Norman Curtis breaks the Cannonball's throttle lever, but the executive tries to make amends with a determined effort to obtain the nearly-nonexistent replacement part.

Director: David Alexander
Writers: Paul Henning (created by), Ed James
Stars: Bea Benaderet, Edgar Buchanan, Jeannine Riley

https://www.imdb.com/title/tt0673944/?ref_=tt_ep_nx