FAN AS 1868222 - Caterpillar

Air Conditioner Instruction Plate Information and Location
Illustration 1 g06228127Air conditioner instruction plate (1) identifies the system refrigerant as R-134a, lists the system capacity for refrigerant, and identifies the type of refrigerant oil used to lubricate the refrigerant compressor. The air conditioner instruction plate is located inside the left rear access door in area (A).R-134a Air Conditioning System Service Port Locations
The R-134a service ports used for the R-134a air conditioning system are quick-connect/disconnect style fittings. In an R-134a air conditioning system, the sizes of the service ports differ, with the high-pressure service port being larger than the low-pressure side service port.The location of the service ports varies based on system layout and machine configuration. Refer to the following examples for typical service port locations.Location By Refrigerant Compressor
Illustration 2 g06228645
Typical example
(2) Refrigerant compressor
(3) Low-pressure side service port
(4) High-pressure side service portHigh-pressure side service port (4) and low-pressure side service port (3) are located near refrigerant compressor (2).Location By Refrigerant Condenser
Illustration 3 g06228733
Typical example
(5) Refrigerant condenser
(3) Low-pressure side service port
(4) High-pressure side service portHigh-pressure side service port (4) and low-pressure side service port (3) are located near refrigerant condenser (5).Glossary of Terms
Ambient air - Outside airCharge - The charge is a predetermined amount of refrigerant that is put into the air conditioning system by weight.Compressor - The compressor is a component in the system that increases the pressure of the refrigerant in the system by pumping.Condenser - The condenser is a component in the system that changes the refrigerant from gas to a liquid.Contaminants - Dirt, water, and airDesiccant - The desiccant is part of the receiver or the accumulator that removes the moisture from the air conditioning system.Detecting - Detecting is finding the source of the problem in the system.Diaphragm - The diaphragm is a rubber-like material. The diaphragm divides the upper chamber and the lower chamber in the thermostatic expansion valve.Discharge - The discharge is the removal of some of the refrigerant or the removal of all the refrigerant from the air conditioning system.Discharge side - The discharge side is the outlet from the compressor to the condenser coil.Evacuating - Evacuating is the removal of air and moisture from the air conditioning system.Evaporation - Evaporation is the process of changing a liquid to a vapor.Evaporator - The evaporator is the component in the air conditioning system that changes the refrigerant from a liquid to a gas by the addition of heat.Expansion Valve - The expansion valve is a component in the air conditioning system that regulates the flow of liquid refrigerants into the evaporator.Fluid - Fluid is a liquid or a gas.Formation of Bubbles - The formation of bubbles in the sight glass of the receiver-dryer indicates that too little refrigerant remains.Flush - To remove foreign material and oil from the system, flush the system with fluid that is approved. The fluid must be approved by the SAE standard and approved by the ISO standard.Freeze - Freezing can cause a liquid to become a solid.Gas - gas is a vapor which contains