Air Conditioning and Heating R-12 All Caterpillar Machines – Identifying the Air Conditioning System

The type of air conditioning system must be identified before the system is serviced. The refrigerant must be identified so that the correct service manual can be selected.




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(1) Compressor block fittings

(2) Charging Ports

By examining charging ports (2), you can determine if the air conditioning system contains R-12 refrigerant.

If the machine has R-12 charging ports, a tag should identify the amount of refrigerant that is needed in the air conditioning system. The tag will be located inside the cab or near the compressor.

R-12 air conditioning systems should contain Air Conditioning Mineral Oil.

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