Atlas Copco Motor Overhaul Kit GA55–75 Replacement – 2901162000

The Atlas Copco 2901162000 is a motor overhaul kit used during major servicing of the electric drive motor on GA55–75 compressors. It provides key wear components required to restore proper motor shaft support, sealing and reliable rotation.

The documented GA55 parts list includes circlips, bearings, a lip-seal kit, bushing and drain nipple as components of the overhaul kit.

Working Process

1. Electrical Power – Electrical energy is supplied to the compressor motor.
2. Motor Rotation – The motor converts electrical energy into rotational mechanical power.
3. Bearing Support – Bearings support the rotating shaft and maintain alignment.
4. Power Transmission – The motor shaft transfers torque to the compressor element.
5. Shaft Sealing – The lip seal helps prevent lubricant leakage at the shaft.
6. Wear Over Time – Continuous operation gradually wears bearings and seals.
7. Motor Overhaul – During major maintenance, worn components are removed and inspected.
8. Component Replacement – The applicable bearings, lip seal, bushing and retaining components are replaced using 2901162000.
9. Reassembly & Testing – The motor is reassembled and checked for smooth rotation, vibration, temperature and leakage.

Kit Components

The GA55 parts list identifies these components under 2901 1620 00:

Main Functions

• Supports GA55–75 motor overhaul.
• Replaces worn motor bearings.
• Replaces the motor shaft lip seal.
• Maintains correct shaft alignment.
• Helps reduce vibration and bearing wear.
• Helps prevent lubricant leakage.
• Restores reliable motor operation.

Typical Failure Symptoms

A motor requiring overhaul may show:

• Abnormal bearing noise.
• Excessive vibration.
• High bearing temperature.
• Shaft-seal leakage.
• Increased motor power consumption.
• Shaft misalignment.
• Reduced motor efficiency.

Maintenance / Overhaul Procedure

1. Shut down the compressor following the applicable Atlas Copco service procedure.
2. Isolate and lock out the electrical supply.
3. Depressurize the compressor.
4. Allow the motor to cool.
5. Disconnect/remove the motor as required.
6. Inspect the shaft, bearings and sealing surfaces.
7. Remove the worn bearings, lip seal and associated components.
8. Clean the mounting surfaces.
9. Install the applicable components from 2901162000.
10. Correctly seat the bearings and lip seal.
11. Check shaft alignment and free rotation.
12. Reassemble the motor.
13. Reinstall and reconnect the motor.
14. Restart the compressor.
15. Monitor vibration, temperature, noise and leakage.
16. Confirm normal compressor performance.

Technical Summary

Recommended catalog title:
Atlas Copco 2901162000 – GA55–75 Motor Overhaul Kit, 2901-1620-00.

A separate Atlas Copco parts reference also lists 2901-1620-00 as “Kit, Motor Overhaul”, confirming the part’s service-kit classification.

Important: Some suppliers may list the kit simply as Motor Overhaul Kit, while others specify GA55–75. For exact compatibility and whether the kit includes all required bearings for your particular motor version, verify the compressor model and serial number before ordering.