HYUNDAI WHEEL EXCAVATOR CHINA MADE R55-9 R55W-9 31M9-50120 ARM CYLINDER ASSY

Welcome to Our Product Page!

Thank you for visiting us. We are proud to present the 31M9-50120 Arm Cylinder Assembly, precisely engineered for the Hyundai R55-9 and R55W-9 wheel excavator models. Whether you're maintaining heavy machinery or upgrading performance, our premium arm cylinder brings increased durability, reliability, and seamless fit.

Built to meet OEM standards, this component plays a pivotal role in powering the arm movement of Hyundai’s 9-Series excavators, ensuring optimal response and durability under demanding conditions. 

As your trusted supplier, we are committed to delivering excellence and value right to your doorstep.

If you have any questions about compatibility, installation, or performance, our expert support team is here to assist you at every step. Thank you for choosing us—let’s keep your equipment operating at peak efficiency!

Product Description:
As an experienced product operations specialist in excavator parts, I present the SPARKLING hydraulic arm cylinder specifically engineered for Hyundai R55-9 and R55W-9 (OEM ref: 31M9-50120). Designed and manufactured under strict quality controls, this cylinder balances precision, durability and cost-effectiveness for professional operators and repair shops.

Why choose SPARKLING 31M9-50120 arm cylinder?
- OEM Compatibility & Fit: Engineered to match Hyundai specifications for R55-9 and R55W-9, ensuring seamless installation and restored machine geometry and performance.
- Robust Construction: High-grade steel tubing, hardened chrome-plated pistons and wear-resistant rod surfaces extend service life under heavy-duty cycles and abrasive conditions.
- Advanced Sealing System: Multi-lip polyurethane seals and high-pressure O-rings prevent leakage, resist contamination and reduce maintenance intervals.
- Precision Machining & Assembly: Tolerance-controlled machining and balanced rod/piston alignment minimize side loads and improve smoothness and responsiveness.
- Rigorous Testing: Each cylinder undergoes pressure, leak and stroke testing to ensure reliable operation under real-world loads.
- Cost-Effective Replacement: Competitive pricing combined with long life and lower downtime delivers clear total-cost-of-ownership advantages over frequent repairs or low-quality alternatives.

Service & Support:
Founded in 2013, SPARKLING MACHINERY emphasizes stability, precision and perseverance. We offer global logistics, responsive technical support, customization options and after-sales service. Our quality processes ensure each 31M9-50120 unit performs reliably in construction, landscaping and utility tasks. We also provide advice for installation, maintenance best practices and spare-part sourcing to keep your fleet productive.

Applications:
Specifically suited for Hyundai R55-9 and R55W-9 excavators, this arm cylinder excels in digging, trenching, material handling and other high-demand operations where predictable hydraulic performance is essential.

Buy with Confidence:
Choose SPARKLING for proven manufacturing standards, warranty-backed parts and dedicated customer service. Contact our sales team for quotations, lead times, and OEM-compatible customization to reduce downtime and control costs.