Atlas Copco Drive Shaft Seal Kit Replacement – 2906065600

The Atlas Copco 2906065600 Drive Shaft Seal Kit is a service kit used to restore the sealing around the compressor’s drive shaft. The seal prevents lubricant or other fluids from escaping along the rotating shaft while also helping prevent external air, dust and moisture from entering the compressor assembly. Atlas Copco lists the kit for stationary oil-free ZR/ZT compressors.

Working Process

1. Drive Shaft Rotation – The motor/drive system rotates the compressor shaft.
2. Power Transmission – The shaft transfers rotational power to the compressor element.
3. Sealing Interface – The shaft seal maintains a controlled sealing interface around the rotating shaft.
4. Leak Prevention – The seal prevents unwanted oil/air/fluid leakage through the shaft opening.
5. Contamination Protection – The seal also helps prevent dust and moisture from entering the internal assembly.
6. Continuous Operation – The sealing components operate continuously while the shaft rotates.
7. Service Replacement – When the seal becomes worn, the components in 2906065600 are replaced to restore sealing performance.

Kit Components

Atlas Copco’s official listing identifies the following components:

Main Functions

• Seals the drive-shaft interface.
• Helps prevent lubricant leakage.
• Helps prevent contamination from entering.
• Maintains proper sealing around the rotating shaft.
• Protects nearby mechanical components.
• Restores sealing performance during scheduled maintenance.
• Supports reliable compressor operation.

Possible Failure Symptoms

A worn or damaged drive-shaft seal can result in:

• Oil/fluid leakage.
• Contamination around the shaft area.
• Increased lubricant consumption.
• Dirt or moisture entering the assembly.
• Abnormal operating conditions.
• Premature wear of nearby components.
• Increased maintenance requirements.

Maintenance Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Fully depressurize the compressor.
4. Allow the equipment to cool.
5. Isolate and drain the relevant circuit if required.
6. Remove the necessary drive-shaft components.
7. Inspect the shaft and sealing surface for wear or scoring.
8. Remove the old seal, bushing and O-rings.
9. Clean the sealing surfaces.
10. Install the components from 2906065600.
11. Ensure the O-rings are correctly seated and not twisted.
12. Install the seal ring and bushing correctly.
13. Reassemble the drive-shaft components according to Atlas Copco specifications.
14. Restart the compressor.
15. Check for leakage.
16. Monitor the compressor for abnormal noise, temperature or vibration.

Technical Summary

Recommended catalog title:
Atlas Copco 2906065600 – ZR/T 55–90 Drive Shaft Seal Kit for Oil-Free Compressors, 2906-0656-00.

Atlas Copco’s official product page confirms 2906065600 as the Drive Shaft Seal Kit for stationary oil-free ZR/ZT compressors and lists the four kit components.

Compatibility note: Verify the compressor model and serial number before ordering. Atlas Copco recommends using the machine serial number in Power Connect to access the machine-specific Spare Parts Book.