For R110-9, R110, and R120 excavators operating in construction, landscaping, and earthmoving applications, a reliable swing gearbox is essential for maintaining smooth rotation, accurate positioning, and efficient machine productivity. Continuous excavation cycles require a durable rotary reduction system that can deliver stable torque output and dependable performance under demanding conditions. RITO R110-9 R110 R120 Excavator Swing Gearbox 31Q4-11140 Hydraulic Swing Drive Rotary Reducer Assembly Unit provides efficient hydraulic power transmission, smooth speed reduction, and reliable slewing operation for Hyundai excavator swing systems. The 31Q4-11140 swing gearbox is commonly associated with Hyundai R110-9 and related R-series excavator swing drive applications.
Item NO.:
31Q4-11140Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK, PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockDesigned for excavator repair and replacement supply, this hydraulic swing drive reducer assembly delivers consistent rotary power transfer and reliable compatibility for Hyundai compact and medium excavator fleets. It is an OEM-equivalent replacement solution for equipment distributors, maintenance workshops, and machine owners who need durable swing components to reduce downtime, restore slewing efficiency, and maintain stable operation during continuous working cycles. The 31Q4-11140 assembly is supplied as a swing reduction gearbox with related part references including 31Q4-11141 and 31Q4-11142 for compatible applications.
| Part Number | 31Q4‑11140 / 31Q4‑11140 |
|---|---|
| Part Name | R110‑9 R110 R120 Excavator Swing Gearbox Hydraulic Swing Drive Rotary Reducer Assembly Unit |
| Compatible Brand | HYUNDAI |
| Applicable Models | R110‑9, R110, R120 Medium Construction Excavator |
| Application | Hydraulic drive system for excavator upper body slewing; widely applied in municipal engineering, highway construction, pipeline laying and bulk material stacking work |
| Material | High‑strength forged alloy steel + medium‑load wear‑resistant bronze friction parts |
| Product Color | Matte anti‑rust industrial metallic gray |
| Working Temperature | -22℃ ~ +58℃ |
| Key Function | Convert hydraulic pressure into stable slewing torque to drive upper carriage rotation for infrastructure and earthmoving projects |
| Condition | 100% New, Aftermarket / OEM Equivalent Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |
Provides smooth speed reduction and reliable torque output for R110-9, R110, and R120 excavator upper structure rotation.
Converts hydraulic motor power through the reducer system to achieve smooth and controlled slewing movement.
Built with high-strength alloy components to withstand vibration, repeated loads, and long operating cycles in demanding jobsite environments.
Matches 31Q4-11140 specifications for Hyundai R110-9, R110, and R120 excavator hydraulic swing drive systems.
FAQ
Q: What operating issues may indicate a worn R110 excavator swing gearbox?
A: Slow swing response, reduced rotation force, abnormal noise, vibration, and unstable upper structure movement can indicate internal gearbox wear.
Q: How does the 31Q4-11140 rotary reducer improve excavator swing performance?
A: It reduces hydraulic motor speed while increasing torque output, helping the excavator achieve smoother and more controlled rotation.
Q: What should customers check before purchasing a Hyundai R110 swing gearbox?
A: Buyers should confirm the excavator model, original part number, gearbox specifications, mounting dimensions, and operating environment.
Q: Why choose a complete swing reduction assembly instead of repairing individual gearbox components?
A: A complete unit simplifies installation, reduces maintenance time, and helps restore reliable swing system performance more efficiently.
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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