| Image | Fits Model | Description | Part # | Price | Product Details | |
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180GLC, 200G, 200DLC, 210G, 210GLC, 210P, 225DLC, 245P, 245GLC, 180LC-5G, 180LC-5N, 180LC-6N, 200LC-3, 210-5A, 210LC-5A, 210-5G, 210LC-5G, 210-5N, 210LC-5N, 210LC-6N, 225USLC-3, 245USLC-5N, 245USLC-6N | Planetary Sun Gear Shaft | 2050692 |
$350.00
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Hitachi Excavator Swing Gearbox Planetary
Hitachi excavator swing gearbox planetary components including sun shafts, sun gears, and swing gearbox bearings. These internal drivetrain components are critical to smooth upper structure rotation and proper torque transfer from the hydraulic swing motor to the house ring gear.
Worn or damaged planetary components can cause grinding noises, jerky swing motion, excessive rotational play, or complete swing failure. Replacing internal sun gears, shafts, and bearings helps restore proper gear mesh and prevents further damage to the swing gearbox housing and ring gear.
This category supports a wide range of Hitachi excavators, including ZX series and earlier EX models. All components are manufactured to meet OEM specifications for spline engagement, gear hardness, and load capacity in high-torque swing applications.
Parts Covered in This Category
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Sun shafts (input/output where applicable)
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Sun gears (planetary center gears)
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Swing gearbox planetary bearings
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Internal planetary drive components
Common Signs of Failure
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Grinding or knocking during swing
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Jerky or uneven cab rotation
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Excessive backlash in swing movement
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Metal debris in swing gearbox oil
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Reduced torque or slipping under load
Key Notes
Application: Hitachi excavator swing gearbox planetary systems
Function: Transfers torque from swing motor to ring gear for house rotation
Build: Hardened, precision-machined gear steel components
Fitment: Model-specific — confirm by excavator model and serial number
Why Choose Replacement Planetary Components
✔ Restores smooth, controlled swing operation
✔ Prevents catastrophic gearbox failure
✔ High-strength, heat-treated gear construction
✔ Direct-fit replacements for Hitachi swing systems
