 The fire engine used for most of the series run has an interesting  history. It was donated new by the manufacturer, Ward LaFrance, with  the condition that the engine be put in active service after the  show. Universal turned it over to the LA Country Fire Department  (which runs the fire station on Universals lot). The LA County Fire  Department traded the engine to the Yosemite Fire Department for  their 1930 vintage engine that went to the LA Country Fire Museum.  Yosemite Fire Department still uses the engine to this day. The  Yosemite Fire Department had to raise the ceiling of their firehouse  by 3 inches to accommodate the new engine.