Atlas Copco ZR300–750 Drive Shaft Seal Kit Replacement – 2906062300

The Atlas Copco 2906062300 is a drive shaft seal kit used to restore the sealing arrangement around the rotating drive shaft in applicable ZR300–750 equipment. The seal prevents unwanted leakage around the shaft while allowing continuous shaft rotation during compressor operation.

The official Atlas Copco Web Shop lists the kit weight as approximately 1.07 kg.

Working Process

1. Drive Power – The drive system supplies rotational power to the compressor shaft.
2. Shaft Rotation – The drive shaft rotates continuously during operation.
3. Sealing Interface – The seal ring forms a controlled sealing interface around the rotating shaft.
4. Leak Prevention – The seal prevents unwanted leakage through the drive-shaft housing.
5. Spring Loading – The spring maintains the required sealing contact as the shaft rotates.
6. Bush Support – The bush supports the sealing arrangement and maintains correct positioning.
7. Wear Over Time – Continuous rotation, temperature and operating conditions gradually wear the sealing components.
8. Seal Replacement – During maintenance, the worn components are replaced using 2906062300.
9. Testing – After assembly, the system is checked for leakage and abnormal vibration/noise.

Kit Components

Atlas Copco’s official product information lists:

Main Functions

• Maintains drive-shaft sealing.
• Prevents leakage around the rotating shaft.
• Replaces worn seal-ring components.
• Maintains correct sealing pressure.
• Supports reliable continuous shaft rotation.
• Helps protect surrounding components from leakage.
• Restores sealing performance during overhaul/service.

Typical Failure Symptoms

A worn drive-shaft seal can result in:

• Leakage around the drive-shaft area.
• Oil/moisture contamination around the seal housing.
• Increased vibration or abnormal noise.
• Deterioration of sealing surfaces.
• Reduced equipment reliability.

Maintenance Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Fully depressurize the equipment.
4. Allow the unit to cool.
5. Access the drive-shaft sealing assembly.
6. Remove the existing seal components.
7. Inspect the shaft and sealing surfaces.
8. Clean the mating surfaces.
9. Install the new bush, spring, O-rings and seal ring from 2906062300.
10. Ensure the seal ring is correctly positioned.
11. Reassemble the drive-shaft assembly.
12. Restore all connections.
13. Restart the equipment.
14. Check the serviced area for leakage.
15. Monitor vibration and abnormal noise.
16. Verify normal operation.

Technical Summary

Recommended catalog title:
Atlas Copco 2906062300 – ZR300–750 Drive Shaft Seal Kit for Oil-Free Compressors, 2906-0623-00.

Atlas Copco’s official listing confirms the ZR300–750 Drive Shaft Seal Kit and its component breakdown.

Compatibility note: Atlas Copco recommends checking the machine’s serial number / Spare Parts Book to confirm the exact applicable part before ordering.