PUMP & MTG GP-HYDRAULIC 2464707 - 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 air conditioner refrigerant gas may be present.
Park the machine on a level surface. Ensure that the parking brake is fully engaged. Lower the dump body.
Operate the engine at high idle.
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Press top of switch (1). Select high fan speed with fan speed switch (2). Set temperature control (3) for maximum cooling.
Allow the air conditioning system to run for several minutes in order to stabilize.
Stop the engine.
Raise the hood.
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Feel suction hose (5) and discharge hose (4) in order to check the system for refrigerant.If the system contains refrigerant, discharge hose (4) will be hot and suction hose (5) will be cold.If the system contains no refrigerant or the system contains only a small amount of refrigerant, poor cooling will result.If poor cooling is experienced, turn off the air conditioner. Stop the engine. Poor cooling indicates a low refrigerant level. Service of the air conditioner should be done by your Caterpillar dealer. For proper cooling, charge the air conditioning system with R-134a refrigerant. Refer to Service Manual, SENR5664, "Air Conditioning and Heating for R134a".
Lower the hood.Note: Operate the air conditioner monthly in order to lubricate the compressor seals. Set the controls on the maximum setting. Operate the system for 5 minutes.