279-0639 Boom Swing Cylinder Seal Kit for Caterpillar 303 C CR 303.5C CR 303.5E CR 303.5E2 CR 304E 304E2 CR Excavators

Restore dependable hydraulic sealing performance with the WINSCHEN 279-0639 Boom and Swing Cylinder Seal Kit. This premium aftermarket replacement is supplied for verified Caterpillar repair applications.

Key Features

Direct Replacement: Referenced to Caterpillar part number 279-0639 for compatible hydraulic service applications.
Reliable Sealing: Selected aftermarket sealing components help maintain fluid retention during normal hydraulic cylinder service.
Maintenance Value: A practical repair solution for boom swing cylinder service, helping restore dependable operation and reduce equipment downtime.

Compatible Equipment Models

Excavators: 303 C CR 303.5C CR

Excavators – Compact: 303.5E CR 303.5E2 CR 304E 304E2 CR

Specifications

Part Number	279-0639 (2790639)
Product Type	Seal Kit
Equipment Brand	Caterpillar
Application	BOOM SWING BOOM
Brand	WINSCHEN
Country of Origin	China
SKU	CTC-279-0639
MOQ	1 SET
Delivery Time	1-3 business days

Need to verify fitment for your specific Caterpillar model? Contact our technical support team for expert assistance. We offer fast global shipping to keep your equipment operational.

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