When Hyundai R130, R135, and R140 excavator machines begin showing signs of compromised slew accuracy, irregular upper-carriage rotation, and diminishing hydraulic output during high-duty-cycle operations, the root cause often traces back to an aging swing drive. The 31N4-10130 replacement motor directly targets these performance shortfalls, helping heavy equipment operators regain precise swing control and sustained job-site productivity.
Item NO.:
31N4-10130Order(MOQ):
1pcsProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockProduced to meet OEM-equivalent engineering standards as a plug-and-play service unit, the 31N4-10130 reliably supplies smooth high-torque slewing motion, controls internal hydraulic bypass, and lengthens service intervals — allowing international parts wholesalers, independent rebuild shops, and heavy equipment fleet operators to drive down repair-related downtime while expanding their competitive component inventory.
| Part Number | 31N4-10130 / 31N410130 |
|---|---|
| Part Name | R130 R135 R140 Excavator Hydraulic Swing Motor Assembly Swing Reduction Gearbox Drive Unit |
| Compatible Brand | HYUNDAI |
| Applicable Models | R130, R135, R140 Medium Excavator |
| Application | Excavator upper structure slewing hydraulic drive system — provides controlled rotary movement for swing operations in construction, mining, infrastructure, and earthmoving projects |
| Material | High-strength forged alloy steel housing + wear-resistant bronze rotary group components |
| Product Color | Matte industrial gray with anti-rust protective coating |
| Working Temperature | -25℃ ~ +60℃ |
| Key Function | Converts high-pressure hydraulic fluid flow into controlled rotary torque for upper-structure swing, ensuring smooth start-stop slewing and precise angular positioning under load |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case / Reinforced Carton / Neutral Packing / Customized Box |
Provides powerful and stable rotary force for R130, R135, and R140 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 31N4-10130 / 31N410130 specifications for Hyundai R130 series excavator hydraulic swing systems.
FAQ
Q: What early warning signs point to a failing swing motor on R130 excavators?
A: Key indicators include unresponsive or uneven swing function, the superstructure continuing to rotate after the control stick centers, harsh grinding or rattling from the drive casing, hydraulic oil misting from shaft seals, and progressive loss of rotary power under working loads. These clues typically signal internal fatigue in the 31N4-10130 rotary element or deteriorating seal integrity.
Q: Which verification steps must be carried out before mounting a new 31N4-10130?
A: Confirm the hydraulic oil achieves ISO 4406 18/16/13 cleanliness rating at minimum, validate the main circuit relief pressure against Hyundai R130/R135/R140 OEM data, ensure the mounting pad is level and threaded bores are free of debris, and flush the entire hydraulic loop to purge any contaminant particles remaining from the failed component.
Q: Does this part come with Hyundai factory branding or is it sourced independently?
A: The 31N4-10130 is an entirely new aftermarket production built to original equipment dimensional and performance benchmarks. RITO HYDRAULIC is a qualified vendor for prominent Chinese excavator manufacturers and Fortune 500 multinational buyers, offering repeatable machining quality, accurate direct-fit installation, and dependable post-purchase technical assistance.
Q: How should I go about ensuring 31N4-10130 matches my excavator configuration?
A: Check the identification number cast on your current motor housing against 31N4-10130 / 31N410130. This swing motor is purpose-built for Hyundai R130, R135, and R140 machines. Cross-check the bolt pattern diameter, hydraulic port arrangement, and output spline geometry — if any dimension remains uncertain, provide your equipment serial code and our engineering in-house team will verify the fit.
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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