CATBrake Parts

3349973 Motor Gp- Swing — Cat 330D

This is a complete swing motor assembly, responsible for providing the rotational power to the upper structure of an excavator. It is built to meet rigorous performance standards, offering superior durability and consistent torque compared to a worn or failing unit. Operators may observe slow or jerky swing movements, a complete loss of swing function, or unusual noises during rotation when this motor fails.

Motor Gp- Swing – Part No 3349973 – 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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 TypeHydraulic Swing Motor Assembly
MaterialCast iron, steel, seals
ApplicationExcavator upper structure rotation
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing swing motor is often a noticeable reduction in swing speed or a hesitation during rotation. If ignored, the motor's torque will continue to diminish, making it difficult to position the machine accurately and potentially causing excessive heat in the hydraulic system. Continued operation with a worn swing motor can lead to internal damage and a complete loss of rotation capability, hindering productivity.

Installation Tip

Thoroughly flush the hydraulic system before installing the new swing motor to remove any contaminants. Ensure all hydraulic lines are properly connected and free of kinks to prevent flow restrictions.

Service Note

Inspect the swing gear, swing bearing, and hydraulic system filters for wear or contamination when replacing the swing motor.