TM 5-4210-230-14&P-1 CONTROLS IMPORTANT Always park in the shade when possible. If  your  vehicle  has  been  parked  in  the  sun with  the  windows  up,  remove  overheated  air inside  by  driving  with  windows  down  and  the air conditioner "ON" for one or two city blocks. At least once or twice a month turn on the air conditioner for a few minutes while the engine is  running.    This  periodic  operation  keeps  all the mechanical parts of your air conditioner in good operating condition. Have   your   IH   air   conditioner   checked   each spring for refrigerant, compressor oil level and belt tension.  Keep radiator area free of bugs, leaves, etc. Do not cover the condenser in front of radiator with  a  screen  wire.    Small  amounts  of  water draining out moisture which has been removed from the air inside your vehicle.  Air conditioning  sometimes  causes  engine  of  the vehicle to run slightly warmer than usual. STALE AIR AND SMOKE To remove stale air or smoke while air conditioner is operating, you may want to open a window vent slightly for a short period of time. SERVICE CHECK-UPS Compressor belt tension should be checked periodically.  Keep radiator and condenser areas free of bugs, leaves,  etc.    Do  not  cover  the  condenser  with  a  screen  wire. Small amounts of water draining out of air conditioner's drain tube is normal and represents condensed moisture which has been removed from the air inside your vehicle. AIR FILTER When air conditioner is being used daily, remove air filter once each season and check for dirt, lint, etc.  Replace if necessary.    Vehicles  operating  in  unusually  dusty  conditions may require replacing the air filter more often. DEHUMIDIFICATION The     heater-defroster     systems     can     be     operated simultaneously  with  the  air  conditioner  during  mild  weather and high humidity conditions for dehumidification of the moist air.  To obtain maximum dehumidification, set the "A/C" lever to "COLD", place the fan switch on "HI" and move   the   "HTR"   lever   towards   "HOT"   until   a   comfortable temperature  is  maintained.    The  air  conditioner  will  remove the humidity while the heater keeps the cab comfortable. HORN In compliance with Noise Control Laws as stipulated in certain localities, the operator must be aware of the proper horn to use when within City Limits.  If this vehicle is equipped with both an electric and air horn system, the electric horn will be known as the "City" horn while the air horn will be known as the "Country" horn. WHEN TO USE Electric Horn (City Horn) The     electric     horn     (city     horn)     is     applicable     to operations within the City Limits. Air Horn (Country Horn) The air horn (country horn) is restricted to operation outside the City Limits. HOOD RAISING THE HOOD 1. Release latch at each side of cowl. 2. Pull on hood tilt assist handle at front of hood. LOWERING THE HOOD 1. Slowly lower hood to closed position. 2. Engage latches at side of cowl. IGNITION SWITCH See Engine Starting under Vehicle Operation. LIGHTING SWITCH When  the  lighting  switch  is  pulled  out  halfway,  the parking, side marker and taillights are 3