When William Reardon (Pierre Watkin), a steel magnate, dies and leaves a strange will. When his spineless and dandified heir and son (Ranny Weeks) returns home from living in Paris, he finds "Tons' Walker (Grant Withers), a strong and burly steel worker running the company, per his late-father's will request. He also finds that his father's will specifies the Junior will change his name to Bill Hall and work in the family steel mill for a year under the fake name. Walker's job is to make a man out of the son. The son is not overjoyed by this prospect. Neither is Walker.
You can stream Bill Cracks Down (1937) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.