Swing Motor Assembly 21K-26-71100 for Komatsu Excavator Models
Compatible with Komatsu excavator models PC160LC-7, PC160LC-8, PC190LC-8, PC180LC-7K, and PC195LC-8.
Key Components & Features
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Swing Hydraulic Motor
Fixed axial piston motor including cylinder barrel, piston, shoe and valve plate to generate rotary power.
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Planetary Gear Reducer
Multi-stage planetary gear set reduces speed and amplifies torque to drive slewing ring.
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Built-in Wet Swing Brake
Spring applied, hydraulically released. Automatically locks upper structure when joystick returns neutral to prevent inertial rotation.
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Valve Block Assembly
Includes overload relief valve, anti-reverse / cushion valve, makeup check valve to absorb impact and avoid rebound at start & stop.
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Output Pinion Gear
Meshes with slewing bearing ring gear for smooth operation.
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Seals & Housing
Includes oil seals, O-rings and durable housing for reliable performance.