TM   5-3610-286-20 Type Auxiliary  switch, operating panel at feeder Auxiliary switch, operating control on the  delivery  O.S. Auxiliary  switch, operating control on feeder (non-stop) 2-14 Change  1 Table 2-4. Electrical Components (cont). Reference designator b4 b8 b9 b15 b16 b17 b70 b83 b84 b151 b14 b15a b16a b11a b22 b23 b61 b140 b20 b21 b101 Description Toggle  switch Selector  switch Push button Push button Push button Push button Push button Push button Push button Emergency  stop Push button Push button Push button Selector  switch Push button Push button Toggle  switch Toggle  switch Push button Push button Push button Function Compressor,  on Safety Forward,  feeder Fast Slow Preset speed Impression, on Feeder, stop Feeder, on Stop Operating Fast Slow Safety Pile, up Pile, down Powder  spray Sheet  counter Main pile, up Main pile, down Feeder,  stop