Light Bell Horn Air Release Coupler cut lever Brake release/Squeal Dynamic Brake Air Hose/Uncoupling Lever Shut Down/Notch Down Fan/Notch Up Rail Clack Air comp. on/off Prime Mover Type Short Air rel. Coupler crash Air compressor Flange squeal Air release Bell Type Horn Type Loco Sound Bell Volume Horn Volume Prime Mover Volume Safety valve pop Air release Flange noise Sand release Air release Linear Slow increase at slow speed Fast increase at slow speed Range 0-15 Auto notch - RPM and notch synchro to speed Manual notch - notch down/up with F8/F9 can only have values of 0 or 3 Type 1 Type 2 Selects the Prime Mover Type (EMD567), GP7/9 or GP30/35 MRC