The PCR 4B Swing Motor is a cornerstone in the hydraulic systems of mid-to-heavy excavators and rotary drilling rigs. As a specialized OEM manufacturer, we understand that "swing" isn't just movement—it's precision. Our PCR 4B series is designed to handle extreme radial loads while maintaining the buttery-smooth rotation required for trenching, lifting, and complex structural work.
By leveraging advanced axial piston technology combined with a high-torque planetary gearbox, the PCR 4B offers a unique "Information Gain" in operational efficiency: lower heat generation and higher energy recovery during braking cycles. This ensures that global enterprises can reduce fuel consumption by up to 12% compared to standard aftermarket alternatives.
Our motors feature integrated mechanical brakes and relief valves, ensuring safety and durability in the most grueling environments from Siberian mines to Southeast Asian construction sites.
Weitai Hydraulic is one of China’s leading hydraulic suppliers, the earliest hydraulic enterprises which specializing in export business for decades. We are committed to providing excellent hydraulic products and services to both businesses and final users worldwide.
At the first beginning, we are OEM factory, and have gradually developed into a comprehensive company integrating production, trade and investment. Hydraulic motors are one of our main products. In addition to our own hydraulic factories, we are a shareholder of a high-quality hydraulic motor manufacturer.
As the Shandong Hydraulic Association’s (SDHA) Secretary Company, Weitai represents the pinnacle of Chinese hydraulic engineering on the global stage.
Motors Produced in 2019
Fully Certified Quality
Trusted OEM Partner
Rapid Support Response
We ensure every PCR 4B motor meets regional standards including CE (Europe), RoHS, CSA (Canada), and UL (USA). Our material suppliers are vetted to ensure cross-border regulatory smoothness.
We support global distributors with localized technical documentation, localized maintenance kits, and 3D step files for seamless integration into local machinery designs.
With our strategically located warehouses and optimized logistics, we mitigate the risks of international shipping delays, ensuring your production line never stops.
China's hydraulic industry has evolved from "mass production" to "intelligent precision." At Weitai Hydraulic, our factories utilize state-of-the-art CNC machining centers and automated testing benches that rival the best German and Japanese facilities.
Cost-Efficiency: By being at the heart of the world's largest hydraulic cluster in Shandong, we reduce raw material costs and logistical overheads, passing these savings directly to our OEM partners.
R&D Velocity: We can move from a custom PCR 4B drawing to a working prototype in weeks, not months. This agility is why giants like SANY and SDLG trust our travel and swing motors for their latest excavator generations.
Integrated Testing: Every motor undergoes a rigorous 100% load test, simulating 500+ hours of extreme field operation before it leaves our facility. This commitment to reliability is why our defect rate remains under 0.05%.
Integration of IoT sensors into the PCR 4B motor for real-time monitoring of pressure, temperature, and vibration, enabling predictive maintenance for fleet owners.
Demand for "Green Hydraulics" is rising. Our latest designs focus on reducing fluid friction and improving the volumetric efficiency of axial piston motors.
The PCR 4B is now being adapted for hybrid electric-hydraulic excavators, where recovery of swing kinetic energy is paramount.
Precision swing control for excavators working in tight city environments where millimeters matter to avoid underground utilities.
High-torque swing drives for log loaders and feller bunchers operating on uneven, steep terrain with heavy dynamic loads.
Corrosion-resistant PCR 4B variants designed for the harsh salt-spray environments of deck cranes and offshore platforms.
Precision Factory
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Technical R&D
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Address: No. 36 Miao Ling Road, Laoshan District, Qingdao, China 266061
Business Hours: Monday-Friday: 9:00 am to 6:00 pm
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Weitai Hydraulic
