In medium- to heavy-duty applications such as deep plowing in agriculture, large-scale municipal sanitation, and light-duty engineering towing, standard small-displacement hydraulic motors often suffer from insufficient power, speed drop under heavy loads, and poor endurance, making them ill-suited for high-intensity construction demands. The OMS 400 orbital hydraulic motor, featuring high torque, high pressure resistance, and high stability, is an excellent component for equipping medium- to heavy-duty equipment and upgrading or replacing older motors. Hanjiu has dedicated many years to the R&D and production of large-displacement cycloidal motors, gaining deep insight into the operating conditions of various heavy-duty equipment. The company has specifically optimized product torque output and fatigue resistance, utilizing proven manufacturing processes to create highly stable, long-lasting hydraulic power products that provide reliable equipment solutions for a wide range of users.
High torque with stable output and no speed drop under heavy loads are the core advantages of the Motor Orbital OMS 400. With ample displacement, this motor delivers powerful low-speed torque and excellent continuous load-carrying performance, easily handling high-resistance conditions such as deep tilling in hard soil, clearing thick debris, and towing equipment, while providing full and stable power output. Thanks to the optimized cycloidal gearing structure developed by Hanjiu, the motor features uniform internal transmission clearances and high meshing precision, ensuring that power loss and speed fluctuations are unlikely to occur even during long-term, continuous operation at full load. At the same time, the product offers excellent pressure resistance, effectively cushioning sudden load impacts during operation. Its overload capacity far exceeds that of ordinary motors of the same type, significantly enhancing the equipment’s construction efficiency and stability.
The unit is rugged and durable, with strong protection, making it suitable for a wide range of complex outdoor operating conditions. Medium- to heavy-duty equipment operates long-term in dusty, humid, and bumpy outdoor environments, placing stringent demands on motor structural strength and sealing performance. Hanjiu has reinforced the structure of the OMS400 to meet these operating conditions, utilizing a thickened one-piece housing and high-strength transmission components. It delivers outstanding resistance to vibration, wear, and fatigue, ensuring that components remain secure and free from wear-related failures even during prolonged, high-frequency, heavy-duty operation. Combined with an upgraded multi-layer composite sealing structure, specialized age-resistant seals effectively block the intrusion of mud, water, and dust, eliminating issues such as oil leaks, clogged oil passages, and internal corrosion. This enables the equipment to operate continuously in all weather conditions, significantly extending its service life.
This motor is extremely versatile, easy to install, and has low operating and maintenance costs. The Motor Orbital OMS 400 features industry-standard interfaces and hydraulic circuit layouts, making it compatible with the vast majority of medium- and heavy-duty agricultural, sanitation, and construction equipment on the market. Whether installed in new machinery or used as a replacement for older parts, no equipment modifications are required—it’s ready to use right out of the box. Hanjiu maintains strict quality control over its products. Before leaving the factory, every OMS 400 motor undergoes comprehensive testing under heavy loads, pressure, and for sealing integrity. This ensures that no products with falsified specifications or substandard performance are released, guaranteeing consistent and stable power output for each unit and providing users with peace of mind during both selection and operation.
In daily use, unstable motor speed and fluctuating power under heavy loads are common issues. Most of these problems are not due to product quality defects but are primarily caused by hydraulic fluid contamination, air ingress in the hydraulic system, poor fluid flow, and overloading. Drawing on years of field service experience, Hanjiu has developed a set of simple and easy-to-follow troubleshooting and repair methods to help users quickly resolve these issues and restore equipment to optimal operating condition.
Troubleshooting can be approached quickly by focusing on four key points: First, inspect the hydraulic fluid. If the fluid is cloudy, blackened, emulsified, or contains impurities, it indicates contamination, which can cause throttling and stuttering in the hydraulic circuit as well as fluctuations in rotational speed. Second, inspect the hydraulic lines to ensure the fluid level is adequate and that the hoses and fittings are not loose or damaged; air ingress into the system can lead to unstable pressure and intermittent power. Third, inspect the hydraulic filter. A clogged filter or kinked or pinched lines can lead to insufficient oil supply and power loss under heavy loads; fourth, follow proper operating procedures. Prolonged operation under excessive loads can cause motor fatigue, resulting in intermittent speed abnormalities.
Targeted repair steps are simple and effective: promptly replace the hydraulic fluid with a compliant grade, clean impurities from the reservoir, and install a new filter to ensure the hydraulic lines are clean and unobstructed; Tighten hydraulic line connections, replace aged or damaged hoses, and thoroughly bleed the hydraulic system after topping off the fluid; organize the hydraulic lines to prevent kinking or pinching; strictly control operational loads to avoid prolonged overloading during construction. After repairs, conduct a no-load test run for 3 to 5 minutes, then gradually apply load during testing; once the speed and power are stable, normal operation may resume.
Proper routine maintenance is key to extending the service life of equipment. Hanjiu recommends that users regularly check the cleanliness of the hydraulic fluid, the integrity of the piping seals, and the condition of the filter elements to prevent operation with contaminated fluid and air ingress into the hydraulic system, while ensuring proper equipment operation and minimizing overload conditions. Leveraging its comprehensive one-stop service system, Hanjiu provides users with full-lifecycle services—including equipment selection and matching, troubleshooting, repair guidance, and maintenance consulting—to ensure the efficient and stable operation of equipment from all angles, helping users reduce costs and improve efficiency.
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