Atlas Copco Outlet Housing Kit C111 X Replacement – 2901906600

The Atlas Copco 2901906600 is an Outlet Housing Kit C111 X used to service the outlet-housing assembly. The kit replaces critical sealing components, helping maintain a proper seal at the outlet housing and prevent compressed-air leakage during compressor operation.

The official Atlas Copco listing specifies a kit weight of 10 g and identifies one 69.5 × 3 O-ring and four 15.1 × 1.6 O-rings as components.

Working Process

1. Compressed-Air Outlet – Compressed air exits the compressor through the outlet assembly.
2. Housing Connection – The C111 X outlet housing provides the connection between the compressor circuit and outlet piping.
3. Sealing – O-rings create airtight seals between the housing and connected components.
4. Pressure Retention – Proper sealing prevents compressed air from escaping.
5. Continuous Operation – The seals operate under pressure and temperature cycling.
6. Wear – O-rings can eventually harden, deform or deteriorate.
7. Service – During maintenance, the old sealing components are removed.
8. Replacement – New O-rings supplied with 2901906600 are installed.
9. Testing – The outlet housing is pressurized and checked for leakage.

Kit Components

Atlas Copco’s official listing confirms these components.

Main Functions

• Maintains outlet-housing sealing.
• Prevents compressed-air leakage.
• Replaces worn O-rings.
• Maintains proper outlet pressure.
• Helps protect surrounding components from leakage.
• Supports reliable compressor operation.

Typical Failure Symptoms

Worn or damaged outlet-housing seals may cause:

• Audible air leakage.
• Pressure loss.
• Reduced compressor efficiency.
• Increased compressor running time.
• Leakage around the C111 housing.
• Increased operating noise.

Maintenance Procedure

1. Shut down the compressor according to the applicable service procedure.
2. Isolate the electrical supply.
3. Fully depressurize the compressor.
4. Allow the system to cool.
5. Access the C111 X outlet housing.
6. Remove the existing O-rings.
7. Inspect and clean the sealing grooves and mating surfaces.
8. Install the new O-rings from 2901906600.
9. Ensure the O-rings are correctly seated without twisting or damage.
10. Reassemble the outlet housing.
11. Tighten connections according to the applicable Atlas Copco specifications.
12. Gradually pressurize the system.
13. Check the housing for air leakage.
14. Restart the compressor and verify normal operation.

Technical Summary

Recommended catalog title:
Atlas Copco 2901906600 – Outlet Housing Kit C111 X, 2901-9066-00.

The Atlas Copco parts catalog also lists 2901906500 as Outlet Housing Kit C90 X and 2901906600 as Outlet Housing Kit C111 X, confirming that these are related housing-service kits for different compressor configurations.

Compatibility note: Verify the compressor model and serial number before ordering, especially when choosing between the C90 and C111 housing kits.