Atlas Copco XAS 185: Air/Oil Separator Maintenance Guide

Atlas Copco XAS 185 Air/Oil Separator Maintenance: Keep Your Compressor Efficient

The air/oil separator in your Atlas Copco XAS 185 plays a critical role in maintaining clean compressed air and keeping oil consumption under control. A neglected separator can lead to excessive oil carryover, higher operating temperatures, and reduced efficiency. Here’s a step-by-step guide on maintaining your separator element to extend the life of your compressor and avoid expensive repairs.

1. What does the air/oil separator do?

The separator element removes oil mist from the compressed air before discharge, allowing the recovered oil to return to the system. This keeps your air clean and minimizes oil consumption.

2. Signs your separator needs attention

Watch for these warning signs that your separator may be clogged or failing:

• Excessive oil consumption or oil carryover in the air line
• Increased system pressure drop
• High operating temperatures
• Visible oil leakage around the separator housing

3. How often to replace the separator element

Follow your maintenance schedule closely — typically, the separator element should be replaced every 1,000 hours or annually, whichever comes first. Harsh or dusty environments may require more frequent replacements.

4. Inspecting and replacing the separator element

Replacing the separator on schedule prevents performance issues and costly repairs.

• Suggested action: Depressurize and drain the system before opening the separator housing.
• Remove the old separator element carefully to avoid debris entering the housing.
• Inspect the scavenge line to ensure it’s not blocked or damaged. Clean or replace as needed.
• Install a new, OEM-equivalent separator element. Ensure seals and gaskets are properly positioned to prevent leaks.
• Reassemble, refill oil if needed, and run the compressor briefly. Recheck oil level and look for leaks.

5. Checking the scavenge line

The scavenge line returns separated oil to the compressor system. If clogged, oil can build up in the separator and get carried over into your compressed air line.

• Suggested action: Check for blockages or restrictions regularly and clean as necessary. Replace damaged or brittle lines immediately.

Final thoughts

Regular air/oil separator maintenance is key to ensuring your Atlas Copco XAS 185 runs clean, efficient, and trouble-free. Replacing your separator element on schedule and keeping the scavenge line clear can save money and prevent unexpected downtime.