65E, 75E, 85E and 95E Agricultural Tractors Caterpillar

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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.

Check Suction Line

Perform this procedure when the ambient air temperature is at least 21°C (70°F).

1. Start the engine. Operate the engine at 2000 rpm.

2. Set the air conditioner control for maximum cooling. Set the fan speed switch to HIGH SPEED.

3. Allow the air conditioning system to run for ten minutes in order to stabilize the air conditioning system.

4. Raise the hood in order to access the air conditioner condenser.

   Note: See Operation and Maintenance Manual, "Engine Compartment Hood - Raise/Lower".

5. Feel the suction line and the discharge line in order to check the system for refrigerant.

   If the system contains refrigerant, the discharge line will be warmer than the suction line.

   If the system contains no refrigerant or the system contains only a small amount of refrigerant, poor cooling will result.