What coolers do
The oil cooler keeps the lubricant at working temperature, and the aftercooler lowers the temperature of the compressed air and removes part of the moisture. Both rely on clean heat-transfer surfaces and good airflow or water flow.
Symptoms of a problem
Typical signs:
- High discharge or oil temperature
- Frequent over-temperature trips
- Oil in the air side or air in the oil side after a failure
- Visible blockage, corrosion or leaks
Identify the cooler
To identify the cooler:
- Compressor make, model and serial number
- Cooler type: air-cooled or water-cooled, plate, tube or fin
- Connection sizes, orientation and mounting details
- Photographs of the cooler and its nameplate
Check before replacing
Cleaning a fouled cooler, checking the fan and ducting, and checking water flow and quality can solve many problems. If the cooler is damaged or leaking, replacement is needed and the cause of the damage should be found.
Before you order
Confirm that size, core type and connections match the machine.
Ask for the supply status of the item: whether it is genuine, OEM-approved or an alternative, and whether it is in stock or must be sourced.
Check the lead-time basis and the warranty terms that apply.
Frequently asked questions
Can a cooler be cleaned instead of replaced?
Often yes. Cleaning with an approved method can restore performance, but a damaged or leaking cooler must be replaced.
Why does the machine overheat in summer?
Higher ambient temperature, a dirty cooler and restricted ventilation all reduce cooling. We check the whole cooling path.
Are aftercoolers important for air quality?
Yes. They lower the air temperature and remove part of the moisture before the dryer, which reduces the load on the dryer.
Field guide
Oil coolers and aftercoolers: clean cores keep the machine running
The oil cooler removes compression heat from the oil; the aftercooler cools the compressed air so that water condenses and can be drained before it reaches the system. Both lose performance when dirt, oil mist and fibres build up on their fins, or when scale forms inside water-cooled units.
| Symptom | Cooler cause |
|---|---|
| High discharge temperature, especially in summer | Oil cooler fins blocked, fan problem, poor room ventilation |
| Excess water downstream | Aftercooler fouled, outlet air too hot, drain failure |
| Oil leak at the cooler | Cracked core or failed joint from vibration or pressure |
| Water-cooled unit running hot | Scale, low water flow, blocked strainer |
Maintenance
- Inspect fins at every service; clean with compressed air or low-pressure washing from the clean side, following the manufacturer's method.
- Keep the compressor room ventilated so the cooler is not breathing its own hot air.
- For water-cooled machines, check water flow, quality and temperature.
- Replace leaking or badly corroded cores rather than patching them.
What to send for a quotation
- Compressor make, model and serial number.
- Photos of the cooler and its fin condition.
- Discharge temperature readings and room temperature.
Send it through find my part or the spare parts enquiry, or call +91 99590 60718 or +91 92468 88812.