Air Conditioning and Heating R-12 All Caterpillar Machines Caterpillar

The air conditioning system is a closed circuit that uses the refrigerant, which is under pressure, to cool the operator compartment.

• The five components of the expansion valve system are the compressor, the condenser coil, the receiver-dryer, the expansion valve and the evaporator coil.

• The six components of the manual orifice tube system are the compressor, the condenser coil, the accumulator, the dryer, the orifice tube and the evaporator coil.

Note: Some orifice tube systems use an accumulator with a desiccant instead of a separate dryer.