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| Application: | Truck |
| Brake Type: | Drum Brake |
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WG9725478228 Sinotruk HOWO Truck Spare Parts Shacman Steering Machine Power Steering Gear Assembly
Product Name: Steering Gear Assembly
Part Number: WG9725478228
Product Model: Sinotruk HOWO
Product After Sales Service: 3 Months
Product Material: Steel
Product Origin: JINAN
Product Unit: PCS
Product Advantages: high-density, good performance, long service life.
The power steering gear, also known as the power steering box or steering gear assembly, is a key component of the hydraulic or electro-hydraulic power steering system on a heavy-duty truck. Its primary functions include:
Amplifying Steering Input - It multiplies the rotational force (torque) applied by the driver to the steering wheel, converting it into much higher force at the steering linkage to turn the heavy front wheels with minimal effort.
Providing Hydraulic Assistance - Using pressurized hydraulic fluid supplied by the power steering pump, the steering gear applies additional force to the pitman arm and drag link, significantly reducing the physical effort required to steer, especially at low speeds or during parking maneuvers.
Maintaining Steering Feel and Road Feedback - While providing power assistance, the steering gear preserves a degree of mechanical feedback from the road surface, allowing the driver to sense tire grip, alignment changes, and road irregularities without excessive effort.
Ensuring Precision and Response - The power steering gear translates steering wheel angle accurately into a proportional wheel angle. It eliminates free play and provides responsive, predictable handling crucial for safely maneuvering a heavy-duty truck in traffic, tight yards, or on highways.
Reducing Driver Fatigue - By dramatically lowering the steering effort, it enables the driver to maintain control over long hours or rough terrain without experiencing arm or shoulder fatigue, improving both comfort and safety.
Supporting Emergency Maneuvers - In sudden swerves or collision avoidance situations, the power steering gear allows the driver to make rapid, full-lock steering inputs quickly and with minimal force, potentially preventing accidents.
Integrating with the Steering Linkage - The steering gear housing typically mounts to the chassis rail. Its output shaft (pitman shaft) connects to the steering linkage (drag link), which then transfers motion to the front axle's steering knuckles and wheels.
Controlling Hydraulic Flow (Reaction Function) - Most heavy-duty truck steering gears include a reaction (feel) mechanism that provides variable assistance: higher assistance at idle/low speeds and reduced assistance at highway speeds for stable, centered steering.
Holding the Wheels in Position - When the driver releases the steering wheel, the power steering gear's internal valve centers itself, and the hydraulic system holds the wheels in their current direction, preventing unwanted self-steering caused by road camber or crosswinds.
In summary, the power steering gear is the core actuation device of the truck's power steering system. It transforms light steering wheel motions into powerful, precise movements at the front wheels, drastically reducing driver effort while retaining road feel and control - an essential feature for safely operating a heavy vehicle.
Shandong Tongjia Supply Chain Management Co., Ltd. was established in 2002, and in 2014, it set up a subsidiary Jinan Perfect Power Auto Parts Co. specializes in the sale of heavy-duty trucks and truck parts. The company primarily focuses on distributing Sinotruk, Shacman, Foton truck parts, and various construction machinery components, offering over 200,000 distinct items. Shandong Tongjia emphasizes international trade, exporting goods to Africa, the Middle East, Southeast Asia, South America, Eastern Europe, and other global markets. The company has developed a dedicated and professional technical staff and sales team, establishing a comprehensive management system. Shandong Tongjia is committed to providing customers with high-quality and affordable products. Currently, its offerings are well-received both domestically and internationally, consistently earning praise from customers around the world.
We have worked with many of the world's leading brands,and almost all of our co-operators have been satisfied with our products and services,and have continued their co-operation for many years. We are looking forward to your enquiry,let's cooperate and win together !
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