Swing motor assembly

The swing motor assembly is the hydraulic component responsible for rotating the upper structure of your excavator or heavy equipment. It converts hydraulic pressure from the main pump into rotational force, enabling smooth and controlled 360° slewing movement on the job site.

At Fab Heavy Parts, we stock new replacement swing motor assemblies compatible with major excavator brands including Caterpillar, Komatsu, Volvo, Hitachi, Kobelco, Doosan, and more. Each unit is sourced to OEM-equivalent specifications to ensure reliable fit and performance.

What's Included

• Complete swing motor assembly (motor + reduction gearbox where applicable)
• Compatible with a wide range of excavator makes and models
• New replacement — not remanufactured or used

Common Symptoms of a Failing Swing Motor

• Slow or jerky upper structure rotation
• Unusual noise during slewing operation
• Hydraulic fluid leaks around the swing motor housing
• Loss of swing torque or complete swing failure

Can't find your model? Contact our team with your equipment make, model, and serial number — we'll source the right swing motor assembly for you.