CRANE OPERATOR AND RIGGER CONTROLS

TM 9-2350-238-10 CRANE OPERATOR AND RIGGER CONTROLS–CONTINUED Key Control or Indicator Function 6 Gas-particulate air Controls gas-particulate air purifier to supply operator and purifier switch rigger clean air through mask M25 or M25A1. 7 Boom winch shift control A three-position control equipped with a pull-up lock. The lever outer notch provides high gear ratio, center notch provides a neutral position (gears not engaged), and inner notch provides low gear ratio for load handling. 8 Tow winch shift control A three-position control equipped with a lock trigger. Turned lever fully counterclockwise provides high gear ratio, turned halfway provides a neutral position (gears not engaged), and turned fully clockwise provides low gear ratio for load handling. 9 Load rating capacities Indicates safe operating capacities of boom in relation to load instruction plate weight, boom position, boom elevation, and with suspension locked, indicates tow winch capacities with and without spade emplaced. 10 Utility outlet A single pole 24-volt outlet that allows auxiliary electrical equipment operation from vehicle electrical system. 11 Floodlight switch Controls two floodlights from inside cab. Used to illuminate night recovery operations. 12 Flasher indicator lamp Flashes on and off when flasher light is operating. 13 Flasher switch Controls flasher light to warn personnel during vehicle operation. 14 Level wind switch Controls electrical power to level wind assembly to automatically align cab with tow winch wire rope. 15 Filter bypass indicator Lights when hydraulic reservoir filter is plugged with foreign light material. 16 . Boom cylinder control Operates a three-position hydraulic valve to control boom handle cylinders to raise or lower boom. It is spring-loaded to return to center position. 2-9