How to Refill Automotive Cooling Oil?
1 Answers
Automotive cooling oil refilling method: 1. For air conditioning systems, first evacuate the refrigeration system; 2. Use a graduated measuring cup to add the required amount of refrigeration lubricating oil; 3. Connect the manifold gauge to the air conditioning system, detach the low-pressure hose from the gauge assembly and immerse it in the cooling oil, while keeping the high-pressure hose connected to the high-pressure service valve and the center hose connected to the vacuum pump; 4. Start the vacuum pump and open the high-pressure manual valve to draw the cooling oil into the compressor. Precautions for refilling automotive cooling oil: 1. Do not mix cooling oils of different brands; 2. Cooling oil readily absorbs moisture and, in the presence of oxygen, can form acidic substances resembling oleic acid that corrode metal components, so always tighten the cap immediately after use; 3. Do not use deteriorated cooling oil; 4. Cooling oil does not provide refrigeration and can hinder heat exchanger efficiency, so never use excessive amounts to avoid reducing cooling capacity.