Light Bell Horn Air Release Uncoupling Lever Brake Release/Squeal Dynamic Brake Air Hose/Uncoupling Lever Shut Down/Notch Down Fan/Notch Up Rail Clack Air Compressor Prime Mover Type Air Release Coupling Air Pump Loco Sound Flange Noise 1 Bell Type Horn Type Loco Sound Bell Volume Horn Volume Diesel Rumble Volume Air Release Flange Noise 2 Loco Sound Sand Drop Air Release Linear Slow increase at slow speed Fast increase at slow speed Normal Headlights Off / Dim / Bright Cycle Rule 17 Auto notch - RPM and notch synchro to speed Manual notch - notch down/up with F8/F9 Selects the Prime Mover Type