CATBrake Parts

3349979 Motor Gp- Swing — Cat 330D

This is a high-performance swing motor group, integral to the slewing system of excavators, enabling precise rotational movement of the upper structure. Manufactured to exacting standards, it offers robust performance and longevity, outperforming worn motors that exhibit sluggishness or leaks. Operators may observe slow swing speeds, jerky movements, or an inability to hold position when this motor group fails.

Motor Gp- Swing – Part No 3349979 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBrake Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

Always replace brakes in axle sets. Bed-in new brake pads with 8–10 moderate stops from 40 km/h. Check disc runout with a dial gauge — maximum 0.1 mm. Inspect caliper slides and pistons when replacing pads.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeSwing Motor Group
MaterialHardened steel, cast iron
ApplicationSlewing system
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early indications of a failing swing motor include a noticeable reduction in swing speed or a slight hesitation during rotation. If ignored, the swing function may become erratic, with the machine struggling to maintain its position or complete a full rotation. Continued operation risks compromising the excavator's ability to perform essential digging and loading tasks efficiently.

Installation Tip

Ensure all hydraulic lines are properly connected and free of kinks before operating the machine after installation. Avoid introducing dirt or debris into the hydraulic system during the replacement process.

Service Note

Inspect the swing gearbox, slew ring, and hydraulic pump for proper operation and fluid levels when replacing the swing motor group.