Atlas Copco Motor Bearing & Shaft Seal Kit Replacement – 2901146200

The Atlas Copco 2901146200 is a motor bearing and shaft seal overhaul kit used during major maintenance of the compressor drive motor. The kit supports replacement of worn motor-bearing and shaft-sealing components to restore smooth motor rotation, proper shaft support and reliable sealing.

The documented kit assembly includes a nipple, seal, bushing, circlip and bearing, and an Atlas Copco drawing identifies the service kit as 2901 1462 00.

Working Process

1. Motor Drive – The electric motor supplies rotational power to the compressor element.
2. Shaft Rotation – The motor shaft continuously rotates under operating load.
3. Bearing Support – Motor bearings support the shaft and maintain correct rotational alignment.
4. Shaft Sealing – The shaft seal helps prevent lubricant contamination/leakage at the shaft area.
5. Wear During Operation – Continuous rotation gradually wears bearings and sealing components.
6. Motor Overhaul – During major maintenance, worn components are removed and inspected.
7. Component Replacement – The bearing, shaft seal and associated components from 2901146200 are installed.
8. Reassembly & Testing – The motor is reassembled and checked for smooth rotation, vibration and leakage.

Main Functions

• Supports motor overhaul.
• Replaces worn motor bearing components.
• Replaces the shaft seal.
• Maintains proper motor-shaft alignment.
• Reduces shaft vibration and mechanical wear.
• Helps prevent lubricant leakage.
• Restores reliable motor operation.

Typical Failure Symptoms

A worn motor bearing or shaft seal may cause:

• Abnormal motor noise.
• Increased vibration.
• Excessive bearing temperature.
• Shaft-area leakage.
• Increased motor power consumption.
• Poor shaft alignment.
• Premature motor or compressor-element wear.

Maintenance / Overhaul Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate and lock out the electrical supply.
3. Allow the motor and compressor to cool.
4. Disconnect the motor from the compressor system as required.
5. Remove the motor assembly or access the bearing/shaft-seal area.
6. Inspect the shaft, bearing seat and sealing surfaces.
7. Remove the worn bearing and shaft-seal components.
8. Clean the mounting surfaces.
9. Install the replacement components from 2901146200.
10. Verify correct bearing seating and shaft alignment.
11. Install the shaft seal without damaging the sealing lip.
12. Reassemble the motor.
13. Rotate the shaft manually to confirm smooth movement.
14. Reinstall and reconnect the motor.
15. Restart the compressor.
16. Check vibration, bearing temperature, noise and leakage.

Technical Summary

Recommended catalog title:
Atlas Copco 2901146200 – Motor Bearing & Shaft Seal / Motor Overhaul Kit for GA/XA Compressors, 2901-1462-00.

Important: Some current parts references show 2901191010 as a later/replacement motor-overhaul-kit reference for 2901146200, so verify the compressor model and serial number before ordering.