Atlas Copco Gearbox Overhaul Kit Replacement – 2906030400

The Atlas Copco 2906030400 is a Gearbox Overhaul Kit designed for servicing the gearbox used in applicable MD100–400 equipment. The gearbox transfers rotational power and maintains the required mechanical operation of the unit. Atlas Copco’s official listing confirms the kit and a weight of 620 g.

During an overhaul, worn bearings, seals, O-rings, gaskets, circlips and other mechanical components are replaced to restore smooth gearbox operation, proper lubrication and sealing.

Working Process

1. Power Input – The drive system supplies rotational power to the gearbox.
2. Gear Transmission – Internal gearbox components transmit the required torque and rotation.
3. Bearing Support – Bearings support rotating shafts and maintain correct alignment.
4. Lubrication – Lubricant reduces friction and removes heat from moving components.
5. Sealing – Radial seals and O-rings prevent lubricant leakage and contamination.
6. Continuous Operation – The gearbox operates continuously with the connected equipment.
7. Wear Over Time – Bearings, seals and other components gradually wear during operation.
8. Overhaul – The 2906030400 kit replaces specified wear and sealing components to restore gearbox condition.

Kit Components

Atlas Copco’s official listing includes components such as:

Main Functions

• Restores gearbox mechanical components.
• Replaces worn bearings and seals.
• Maintains shaft alignment.
• Prevents lubricant leakage.
• Supports smooth rotation.
• Reduces vibration and abnormal noise.
• Helps extend gearbox service life.
• Improves reliability after major maintenance.

Possible Failure Symptoms

A worn gearbox may cause:

• Abnormal gearbox noise.
• Excessive vibration.
• Oil/lubricant leakage.
• Increased operating temperature.
• Bearing noise.
• Shaft or gear misalignment.
• Reduced mechanical efficiency.
• Premature component wear.

Maintenance / Overhaul Procedure

1. Shut down the equipment according to the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Depressurize the relevant system.
4. Allow the equipment to cool.
5. Drain the applicable gearbox lubricant.
6. Remove the gearbox assembly/access components.
7. Inspect gears, shafts, bearings and housing.
8. Remove worn bearings, seals, O-rings and other components.
9. Clean the gearbox housing and mating surfaces.
10. Install the replacement components supplied with 2906030400.
11. Install bearings and seals correctly.
12. Check shaft alignment and free rotation.
13. Install circlips, keys and retaining components correctly.
14. Reassemble the gearbox using the specified torque values.
15. Fill with the recommended lubricant.
16. Restart the equipment.
17. Check for abnormal noise, vibration and lubricant leakage.
18. Verify normal operating temperature and performance.

Technical Summary

Recommended catalog title:
Atlas Copco 2906030400 – MD100–400 Gearbox Overhaul Kit, 2906-0304-00.

Atlas Copco’s official product page confirms 2906030400 as the MD100–400 Gearbox Overhaul Kit and provides the complete component list.