ELBOW 7L6771 - Caterpillar

Personal injury can result from contact with refrigerant.Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.Personal injury or death can result from inhaling refrigerant through a lit cigarette.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.Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.
Illustration 1 g01337150
The refrigerant dryer is located on the front frame behind the radiator grill. The dryer contains the desiccant that dries the liquid refrigerant.The moisture indicator is located on the dryer. The indicator should be checked at the end of each shift. If the color is blue, the system is dry. If the color is pink, the system contains moisture. The dryer must be changed.Note: The "R-134a" refrigerant dryer should be replaced annually. Extremely humid operating conditions may require more frequent replacement of the dryer. The dryer should also be replaced if the air conditioning system has been leaking or if the system has been opened for service repair.Note: The dryer should be changed once per year even though the indicator remains blue.ReferenceRefer to Service Manual, SENR5664, "Air Conditioning and Heating R-134a" for the correct procedure.