BARREL GP-PUMP 1401800 - 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 and run the engine at high idle.
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Press the top of the air conditioner switch (1) .
Set the air conditioner temperature control knob (2) to the setting for maximum cooling. Set the fan control knob (3) to HIGH.
Allow the air conditioning system to stabilize for two minutes.
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Open the rear door for the engine on the back side of the machine. Use the prop rod to hold the rear door open.
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To check the system for refrigerant, feel the suction line (1) and the discharge line (2) .If the system contains refrigerant, the discharge line will be warmer than the suction line.If the system does not contain refrigerant or the system is very low on refrigerant, poor cooling will result.
Close the rear door for the engine.