50D - EXCAVATOR 1830 HEATING AND AIR CONDITIONING Parts group 1830 HEATING AND AIR CONDITIONING 1830 HEATING AND AIR CONDITIONING . Air Conditioning System Cooler Duct Air Conditioner Duct and Support FRONT COVER AND DUCT WITH AIR CONDITIONING AIR CONDITIONER COMPONENTS AIR CONDITIONER COMPRESSOR AND DRIVE COMPONENTS AIR CONDITIONER SOLENOID VALVE AND HOSES AIR CONDITIONER COMPONENTS DEFROSTER / AIR CIRCULATION FAN