High-Performance RHF4 Turbocharger for ST445 Tractor & TC55DA Loader

• Heavy-Duty Industrial Grade: This RHF4 turbocharger is built to handle the grueling conditions of agricultural and construction work. Whether it's powering a ST445 tractor or a TC55DA loader, this unit is designed to provide consistent torque and boost under heavy load, ensuring your N844L or N844LT engine doesn't bog down in the field.
• Engineered for Aural & Thermal Stability: The turbine housing is cast from high-resistance materials to prevent cracking during long cycles of high-temperature operation. We know tractor engines run for hours at constant RPMs; our housings are stress-tested to maintain their structural integrity without warping or leaking exhaust gas.
• Precision VSR Balancing: To prevent premature bearing failure, every RHF4 unit is balanced on a high-speed Vibration Sorting Rig (VSR). This eliminates the vibrations that lead to that high-pitched "death whine" and ensures the internal journal bearings stay lubricated and stable even at peak boost.
• Direct Bolt-On Fitment: This is a 1:1 match for the original brand units. All mounting flanges, oil inlets, and drain ports are machined to exact factory specifications. You won't need to relocate lines or modify brackets; it drops straight onto the N844LT manifold.
• Optimized Spool for Low-End Torque: Compact diesel engines in loaders and tractors need power down low. The internal compressor wheel is balanced for quick response, reducing lag so you get immediate hydraulic power and drive traction when you hit the throttle.

Fengcheng Zhongke Turbocharger Co., Ltd. is a leading high-tech factory specializing in the R&D, production, and global distribution of high-performance turbochargers. Based in Fengcheng—one of the world’s most renowned turbocharger manufacturing hubs—we have grown from a local workshop into a global supplier, serving heavy-duty, commercial, and passenger vehicle markets worldwide.

At Zhongke, we don't just "make" parts.we engineer reliability.

• Material Integrity: We exclusively use K18 Nickel-Alloy turbine wheels, capable of withstanding extreme exhaust temperatures (up to 950°C) without deformation.
• Dynamic Balancing: 100% of our turbochargers undergo high-speed dynamic balancing tests at 150,000+ RPM to guarantee zero vibration and extended bearing life.
• Certified Quality: Our production processes are certified under ISO 9001 and IATF 16949, the gold standards for the global automotive and heavy-machinery industries.

Manufacturing Prowess:Our facility is equipped with state-of-the-art production lines, including precision 5-Axis CNC machining centers, high-speed VSR (Vibration Sorting Rig) balancing machines, and advanced material testing labs.

Our Specialization:We maintain a vast inventory of over 3,500+ turbocharger models, with a focus on heavy-duty and construction machinery engines. Focused on optimizing fuel efficiency and restoring factory horsepower, our passenger car turbos are engineered with the same precision and K18 heat-resistant materials as our industrial line, ensuring reliable performance for daily commuting and high-speed driving alike.

Global Partnership & Support: Zhongke Turbo is more than just a manufacturer; we are your long-term technical partner. With nearly 30 years of export experience, we understand the logistics and technical requirements of the international market. We provide a warranty and dedicated technical support to help our partners succeed.

• Key Export Regions: North America, Europe, the Middle East, Africa, Latin America, and Southeast Asia.

Experience the difference of nearly 30 years of factory expertise. Contact us today for wholesale inquiries or technical consultations.