Availability: In stock
We ship all orders promptly, with standard delivery times of 1-3 days. If you receive a defective or incorrect item, you can return it within 30 days for a full refund.
All photos are for illustrative purposes only.
The design or colour of your part may be different to the image supplied.
Sizing of all parts is crucial to the installation and use for you machine.
If you want to make sure parts fit your specific model please get in touch via email.
Whether it's a Swing Motor, Final Drive or Radiator aftercare is critical to minimise downtime.
We ask you refer to manufacturer guides on how to care for your parts.
OEM-Quality Replacement | 12-Month Warranty | Free Shipping to the USA, UK & North America
Upgrade your Hyundai excavator with this premium Swing Gearbox Assembly for the R450-7 model — part number 31QB-10141.
Built to exact OEM specifications, this swing gearbox ensures reliable rotation performance, long service life, and smooth operation under heavy load conditions.
Whether you’re replacing a worn unit or performing a full swing drive rebuild, this assembly is designed for direct fitment and dependable performance in demanding working environments.
✅ OEM-Quality Fitment – Engineered to match Hyundai specifications (P/N: 31QB-10141).
✅ Durable Construction – Built with hardened gears and precision machining for maximum strength.
✅ 12-Month Warranty – Full coverage on manufacturing defects for your peace of mind.
✅ Free Economy Shipping – Available to the United States, United Kingdom, and North America.
✅ Ready to Install – Fully assembled swing gearbox, tested for performance before dispatch.
This swing gearbox fits the following Hyundai excavator models:
R450-7
R450LC-7
R480LC-9A
R500LC-7A
R520LC-9
(If you’re unsure about compatibility, contact us with your machine’s serial number — we’ll confirm before you order.)
At Pro Construction Parts, we supply high-quality aftermarket and OEM excavator components for major brands including Hyundai, Volvo, Doosan, JCB, Takeuchi, and Yanmar.
Our parts are fully tested, warranty-backed, and delivered free of charge to customers across North America and the UK.
We also stock a wide range of Hyundai Swing Drives & Gearboxes, including units for:
Hyundai R210-7 / R220-9
Hyundai R250LC-9
Hyundai R290-7A / R300LC-9S
Hyundai R380LC-9A / R430LC-9S
Warranty: 12 Months (Parts Only)
Shipping: Free Economy Delivery to USA, UK & North America
Express Delivery: Available at checkout upon request
