Construction crews operating Kobelco SK120-3 excavators regularly report deteriorating swing accuracy, unsteady upper-structure motion, and declining hydraulic drive performance during repetitive loading cycles. The SK120-3 swing gearbox assembly tackles these issues, delivering renewed slewing precision and reliability.
Item NO.:
SK120-3Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK, PAYPALProduct Origin:
JAPANShipping Port:
Huangpu, GuangzhouLead Time：
In StockManufactured to OEM-grade build quality for direct bolt-on replacement, the SK120-3 delivers consistent high-torque rotary performance, controls internal hydraulic bypass, and stretches service intervals.
| Part Number | SK120-3 |
|---|---|
| Part Name | SK120-3 Excavator Swing Gearbox Assembly |
| Compatible Brand | KOBELCO |
| Applicable Models | SK120-3, SK120, SK130 Excavator |
| Application | Excavator upper structure slewing hydraulic drive system |
| Material | High-strength forged alloy steel housing |
| Product Color | Matte industrial gray with anti-rust coating |
| Working Temperature | -25°C~+60°C |
| Key Function | Converts high-pressure hydraulic fluid into controlled rotary torque |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Provides powerful and stable rotary force for SK120-3, SK120, SK130 excavator upper structure rotation and swing operations.
Converts hydraulic pressure into controlled rotary movement for smooth and precise swing operation.
Provides stable speed reduction, increased torque output, and efficient power transmission under heavy-duty excavation conditions.
Matches SK120-3 specifications for KOBELCO SK120-3 series excavator hydraulic swing systems.
FAQ
Q: What are the common symptoms of a failing SK120-3 swing gearbox?
A: Check for labored or erratic swing movement, the cab continuing to rotate after joystick release, harsh grinding originating from the rotary drive casing, oil mist escaping around shaft seals, and gradual torque fade during loaded rotation.
Q: What should be checked before installing the SK120-3?
A: Ensure hydraulic fluid cleanliness meets or exceeds ISO 4406 18/16/13 standards, verify main relief pressure corresponds to Kobelco factory parameters, check the mounting face for flatness and clean all threaded ports, and flush the hydraulic circuit thoroughly.
Q: Is this SK120-3 a genuine OEM or aftermarket part?
A: This is a 100% new aftermarket assembly manufactured to OEM specifications. RITO HYDRAULIC is a listed supplier to major Chinese excavator OEMs and Fortune 500 companies.
Q: How to confirm the SK120-3 fits my excavator model?
A: Cross-check your existing part number against SK120-3. This assembly fits SK120-3, SK120, SK130 excavators. Contact our technical team with your serial number for compatibility confirmation.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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