How to Clean Air Compressor Oil Cooler

1. Safety Preparation Before Cleaning

1. Shut down the unit and cut off power with warning tag. Cool oil temperature below 60℃ to avoid scalding by hot oil.
2. Release internal system pressure fully until pressure gauge reads zero.
3. Remove outer protective covers to fully expose radiator fins.
4. Clear surrounding cartons and debris for unobstructed operation space.

2. Dry Air Blowing for Air-cooled Coolers (Light dust, catkin blockage)

1. Adjust air gun pressure to 0.3~0.4 MPa. Never blast fins with high pressure which bends aluminum fins permanently.
2. Blow air from inside to outside, opposite to fan airflow direction, to blow out dust and lint.
3. Blow section by section evenly, focusing on dirt trapped between fins.
4. Straighten slightly bent fins with plastic comb; avoid hard metal scrapers.

3. Water Washing for Coolers Heavily Coated with Oil Sludge

1. Blow loose surface dust off first.
2. Dilute special neutral cooler detergent; strong acid or alkali is forbidden to prevent aluminum corrosion.
3. Spray both sides of radiator with low-pressure water gun and detergent, leave for 5–10 minutes to dissolve oil sludge.
4. Rinse thoroughly with clean low-pressure water until draining water is clear without black oil residue.
5. Air-dry naturally or run cooling fan for 10 minutes to ensure complete drying before reinstalling covers.

   ⚠️ Cover electric cabinet, motor and sensors in advance to prevent water ingress.

4. Descaling Internal Water-cooled Heat Exchangers

1. Close cooling water valves and drain all residual water inside pipelines and cooler.
2. Connect circulating cleaning pump with neutral descaling agent, circulate for 30–60 minutes to dissolve limescale.
3. Flush with clean water repeatedly to remove residual chemicals until outlet water is neutral and clean.
4. Restore pipeline connections and check smooth water flow.

5. Inspect & Clean Auxiliary Heat Dissipation Parts

1. Cooling fan: Remove oil and dust on blades; adjust or replace slipping belts; check fan motor for abnormal noise.
2. Wind shroud: Clean built-up sludge inside to ensure smooth hot air exhaust and avoid hot air recirculation.
3. Air ducts: Clear inlet and outlet vents of blockages for smooth cold air intake.

6. Acceptance Standard After Cleaning

1. Radiator fins are fully visible without thick dust or oil sludge; no large-area bent fins.
2. Run unit under no-load for 20 min; oil temperature stabilizes at 80~92℃ without overheat alarm.
3. Hot air exhausts smoothly without recirculation baking the cooler.

7. Daily Maintenance to Reduce Frequent Cleaning

1. Blow weekly in catkin seasons; every 3–5 days for heavily dusty workshops.
2. Keep heat sources such as AC outdoor units and ovens far away to reduce oil adhesion.
3. Replace air filter on schedule to cut continuous dust intake.