Atlas Copco Drive Shaft Bearing Kit Replacement – 2906065700

The 2906065700 Drive Shaft Bearing Kit is used to service the drive-shaft bearing arrangement in applicable ZR/T 55–90 compressors. The bearings support the rotating drive shaft, maintain shaft alignment and allow smooth transmission of rotational power to the compressor element.

Working Process

1. Power Input – The motor supplies rotational power to the drive shaft.
2. Shaft Rotation – The drive shaft rotates at the required operating speed.
3. Bearing Support – The bearings support the shaft and maintain its correct position.
4. Load Distribution – Bearings handle the radial/rotational loads generated during operation.
5. Power Transmission – The shaft transfers rotational power to the compressor element.
6. Smooth Rotation – Properly functioning bearings reduce friction and unwanted vibration.
7. Continuous Operation – The bearing assembly operates continuously while the compressor is running.

Main Functions

• Supports the compressor drive shaft.
• Maintains shaft alignment.
• Enables smooth shaft rotation.
• Reduces friction and mechanical wear.
• Helps control vibration.
• Supports reliable power transmission.
• Replaces worn drive-shaft bearing components during service.

Kit Components

A ZR/ZT parts list identifies the 2906 0657 00 Drive Shaft Bearing Kit with components including a bearing, ball bearing and internal circlip.

Possible Failure Symptoms

Worn drive-shaft bearings may cause:

• Abnormal bearing noise.
• Increased vibration.
• Shaft movement or misalignment.
• Increased operating temperature.
• Excessive mechanical wear.
• Reduced transmission efficiency.
• Premature drive-shaft or coupling damage.
• Compressor shutdown in severe cases.

Maintenance / Replacement 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. Remove the necessary drive-shaft access components.
6. Inspect the shaft and bearing seats for wear or damage.
7. Remove the existing bearing components.
8. Clean the mounting surfaces.
9. Install the replacement components supplied with 2906065700.
10. Install the bearings and internal circlip correctly.
11. Check shaft alignment and free rotation.
12. Reassemble the drive system according to the specified torque requirements.
13. Restart the compressor.
14. Check for abnormal noise and vibration.
15. Monitor operating temperature and verify normal operation.

Technical Summary

Recommended catalog title:
Atlas Copco 2906065700 – ZR/T 55–90 Drive Shaft Bearing Kit for Oil-Free Compressors, 2906-0657-00.

Important: Do not confuse 2906065700 with 2906065600. The former is the Drive Shaft Bearing Kit, while 2906065600 is the Drive Shaft Seal Kit.

For exact compatibility, verify the compressor model and serial number before ordering.