This is a Swing Piston Motor, a critical component within the hydraulic system responsible for rotating the upper structure of the excavator. It ensures smooth and controlled slewing movements, differentiating itself from a worn unit by providing consistent torque and precise positioning. Operators may notice a loss of swing speed, jerky or uncontrolled rotation, or an inability to hold position when this motor begins to fail.
Always verify with serial number before ordering.
Parts Trading Company · Mumbai, Est. 1956 · Same-day dispatch · Ships worldwide · GST invoice included
From the same category — may also be needed
Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India
Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
Initial signs of a failing swing piston motor include a noticeable decrease in slewing speed or a slight hesitation during rotation. If ignored, the motor may begin to slip, causing jerky movements and difficulty in precise positioning. Eventually, the machine may lose its ability to swing altogether, significantly impacting operational capability.
Ensure the hydraulic system is properly flushed and free of contaminants before installing the new motor to prevent premature wear. Avoid overtightening mounting bolts, as this can distort the motor housing.
Inspect the slew ring and swing gear for wear and damage, and check the hydraulic system's relief valves when replacing the swing piston motor.