AIR CLEANER AS 2660406 - Caterpillar

Personal injury can result from contact with refrigerant.This system is under pressure at all times, engine running or not. Heat should never be applied to a charged system. 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.Before any checks of the air conditioning and heating system are made, move the machine to a smooth horizontal surface. Lower all implements to the ground. Make sure the transmission is in neutral or park and that the parking brake is engaged. Keep all other personnel either away from the machine or where they can be seen.
Connect the manifold gauge set to the service ports near the refrigerant compressor. The service ports for charging are located on the refrigerant lines. Connect the blue hose to the service port on the suction side of the compressor. Connect the red hose to the service port on the discharge side of the compressor. Make sure that the valved couplings are turned counterclockwise for installation. Then, turn the valved couplings clockwise in order to open the valves.
Turn the pressure valve clockwise and make sure that both pressure valves on the manifold gauge set are closed.
Put a clean rag over the disconnected yellow charging hose fitting at the manifold gauge set. This will prevent the spraying of compressor oil. Open the low pressure valve on the gauge set about 1/2 turn. Keep the valve open for 2 to 3 seconds in order to release air from the blue hose. This will also release air from the gauge set. Close the low pressure valve on the gauge set. Repeat this process for the high pressure valve.
Tighten the yellow charging hose fitting at the manifold gauge set.Note: Use a refrigerant identifier (analyzer) in order to prevent refrigerant that is not R-134a from contaminating tools.