SHAFT 3T5537 - Caterpillar

The refrigerant must be recovered before the accumulator is removed. Refer to the Testing and Adjusting, "Refrigerant Recovery" section.Remove the accumulator. The accumulator has an internal oil drain hole which could become plugged. The oil could be trapped inside the accumulator. It is necessary to check for excessive oil when the accumulator is changed. Add the same amount of oil that was drained from the old accumulator. Add an additional 30 mL (1 fl oz) to the new accumulator before the new accumulator is installed. Do not add oil if the compressor was changed also. Evacuate the system and recharge the system. Refer to the Testing and Adjusting, "Refrigerant System - Evacuate" section. Refer to the Testing and Adjusting, "Refrigerant System - Charge" section.Note: If the accumulator has frost on the outside, the air conditioning system still contains refrigerant.