Does the selector have an advancer, or is it just a normal pie plate selector? The floor bars make a contact on the moving selector. Also look at the travel cable for the floor stopping switch. there is one for hall calls up and down, and one for car call stopping. you should find them easily on the wiring diagram. Assuming you have one. The advancer was on gearless machines that ran like 500 fpm. A 350 fpm geared machine was just a normal pie plate config.