LINES GP-WATER 3790143 - Caterpillar

Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas can cause bodily harm or death. Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.
Start the engine. Operate the engine at high idle.
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Set the air conditioner control for maximum cooling. Set the fan control on HIGH FAN SPEED position.
In order to stabilize the air conditioning system, run the air conditioning system for two minutes.
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Open the engine compartment access door on the left side of the machine.
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Check for refrigerant in the air conditioning system, as follows:
Feel the suction line (1) and feel the discharge line (2) .
If the system contains refrigerant, the discharge line is warmer than the suction line.
If the air conditioning system does not contain refrigerant or if the level of the refrigerant in the air conditioning system is very low, then you will experience poor cooling.
Close the engine compartment access door on the left side of the machine.
Stop the engine.
Consult your Caterpillar dealer for air conditioner system service, if necessary.Note: For proper cooling of the air conditioner, check the temperature of the vent with a thermometer. The air temperature should be between 13 to 16 °C (55 to 60 °F).