Atlas Copco Lip Seal Kit Replacement – 2901056100

The Atlas Copco 2901056100 Shaft Seal Kit C55 Air End is a genuine service kit designed for the sealing arrangement of compatible oil-injected screw compressor air ends. Atlas Copco officially identifies part 2901056100 as “SHAFT SEAL KIT C55 AIR END” for an oil-injected screw compressor.

Working Process

The 2901056100 shaft seal kit provides a sealing barrier around the rotating shaft of the compressor air end. During compressor operation, the air-end shaft rotates continuously while lubricating oil is circulated through the compressor to lubricate and cool internal components. The shaft seal prevents this oil from escaping through the shaft area.

The sealing components maintain close contact around the rotating shaft while allowing smooth shaft rotation. This controlled sealing action helps retain lubricating oil inside the air-end assembly and prevents unwanted leakage around the shaft.

The kit includes important sealing components such as a bushing, O-ring 30 × 1.5, shaft-seal component and another O-ring, according to Atlas Copco’s product information. The listed kit weight is approximately 484 g.

When the original shaft seal becomes worn, hardened or damaged, oil can begin leaking from the air-end shaft area. Replacing the complete 2901056100 shaft seal kit restores the sealing function and helps protect the compressor from lubricant loss and contamination around the shaft assembly.

Key Benefits

• Helps prevent compressor oil leakage around the air-end shaft.
• Maintains effective shaft sealing during continuous rotation.
• Helps retain lubricating oil inside the compressor system.
• Supports reliable air-end operation.
• Helps protect surrounding compressor components from oil contamination.
• Useful for scheduled compressor maintenance and shaft-seal replacement.
• Provides the required sealing components in one service kit.
• Helps reduce the risk of downtime caused by shaft-seal leakage.

Kit Components

According to Atlas Copco’s official listing, the kit contains:

• Bushing – 1 piece
• O-Ring 30 × 1.5 – 1 piece
• Shaft Seal Instruction/Seal Component – 1 piece
• O-Ring – 1 piece

Compatibility

Part 2901056100 is specifically identified by Atlas Copco as a C55 air-end shaft seal kit. Other parts catalogs also list it as a Lip Seal Kit (S & B) for Atlas Copco compressor applications.

The exact compressor model, air-end configuration and serial number should be checked before installation to confirm compatibility.

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