The Steering Axle Assembly is a critical front-axle component that supports the vehicle’s weight and provides precise steering control. This comprehensive kit includes all necessary parts for a complete front axle rebuild or replacement on the Sitrak C7H, ensuring reliable steering performance and long-term durability.
This complete Steering Axle Assembly kit features the Front Beam, Nameplate, Thrust Tapered Roller Bearing, Kingpin, Kingpin Limiting Screw, Spring Washers, Hexagon Nuts, Adjusting Shims, Internal Circlip, Grease Fitting Assembly, Kingpin Cover, O-Ring, Steering Knuckle Assembly (Left and Right), Kingpin Cover Assembly, Hexagon Head Bolts M8, Hexagon Head Bolts M18*1.5, Hexagon Thin Nuts, Adjusting Screws, Steering Tie Rod Arm (Left and Right), Hexagon Head Bolts M20*1.5, Steering Tie Rod Assembly (φ50), and Grease. Every component is engineered to OEM specifications for a perfect fit and reliable performance. For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models for the Steering Axle Assembly.
The Steering Axle Assembly is designed to withstand the high loads and harsh conditions of heavy-duty trucking. Its precision-machined components ensure accurate wheel alignment and smooth steering, contributing to vehicle stability and tire longevity. This Steering Axle Assembly is the definitive choice for operators who demand reliable front-end performance and safety.
The Front Beam is the main structural member of the Steering Axle Assembly, a forged I-beam section made of high-strength steel. It provides the foundation for mounting the steering knuckles, tie rods, and other suspension components. Its precise geometry ensures correct wheel alignment and load distribution, contributing to stable handling and long service life.
The Nameplate is a durable identification tag attached to the Steering Axle Assembly, displaying essential information such as part numbers, axle ratings, and manufacturing date. It ensures traceability and aids in maintenance record-keeping, helping technicians quickly identify the correct replacement components when needed.
This heavy-duty bearing supports the axial load of the steering knuckle. In the Steering Axle Assembly, it is a precision-ground tapered roller bearing designed to handle high thrust loads while allowing smooth rotational movement. Its robust construction ensures long life and reliable steering performance under extreme conditions.
The Kingpin is a precision-ground steel pin that connects the steering knuckle to the axle beam, serving as the pivot point for wheel turning. In the Steering Axle Assembly, it is case-hardened and ground to provide a durable, low-friction bearing surface. Its accurate fit ensures precise steering geometry and reduced wear on other components.
This screw prevents the kingpin from rotating or moving axially. In the Steering Axle Assembly, it is a high-strength fastener that locks the kingpin in place, ensuring correct alignment and preventing loosening under vibration. Its precise thread engagement guarantees reliable retention.
The Spring Washer is a split-ring type lock washer used under various bolts in the Steering Axle Assembly. Made of high-carbon spring steel with a corrosion-resistant coating, it provides a mechanical lock against loosening due to vibration, ensuring that all fasteners remain secure throughout the vehicle’s service life.
These standard hexagon nuts are used throughout the Steering Axle Assembly to secure various components. Manufactured from zinc-plated steel with precise metric threads, they provide reliable clamping force and corrosion resistance, ensuring that all connections remain tight and durable.
These precision-ground steel shims are used to adjust the preload and clearance of the kingpin and bearings in the Steering Axle Assembly. Available in various thicknesses, they allow fine-tuning of the assembly to achieve the correct bearing preload and steering geometry, ensuring smooth operation and extended component life.
This retaining ring secures bearings or other components in their bores. In the Steering Axle Assembly, it is a spring steel circlip that provides positive axial retention, preventing movement of the bearing or seal under load. Its precise fit ensures easy installation and reliable retention.
The Grease Fitting Assembly provides a convenient point for lubricating the kingpin and bushings. In the Steering Axle Assembly, it is a standard grease nipple with a 1/8″ NPT thread, allowing easy connection to a grease gun for periodic maintenance, ensuring that moving parts remain well-lubricated.
This cover seals the top of the kingpin bore, preventing dirt and moisture from entering. In the Steering Axle Assembly, it is made of stamped steel with a rubber gasket, providing a positive seal that protects the kingpin and bearings from contamination, thus extending their service life.
These O-rings provide static seals between the kingpin cover and the axle beam. In the Steering Axle Assembly, they are made of high-temperature FKM rubber with a hardness of 70 Shore A, resistant to oil, grease, and extreme temperatures, ensuring a reliable seal against contamination.
The Left Steering Knuckle Assembly is a forged steel component that pivots on the kingpin to steer the wheel. In the Steering Axle Assembly, it incorporates the spindle for wheel mounting and provides attachment points for the tie rod and brake components. Its precision-machined surfaces ensure accurate wheel alignment and smooth steering.
This assembly combines the kingpin cover with its mounting hardware. In the Steering Axle Assembly, it provides a complete sealing solution for the kingpin area, including the cover, O-rings, and fasteners, ensuring a clean and protected environment for the pivot components.
These M8 hexagon head bolts are used to secure various smaller components such as covers and brackets. In the Steering Axle Assembly, they are grade 8.8 with a zinc plating, providing reliable clamping force and corrosion resistance for light-duty fastening applications.
These heavy-duty M18 fine-pitch bolts secure the steering knuckles to the axle beam. In the Steering Axle Assembly, they are grade 10.9 with a zinc-nickel coating, providing exceptional clamping force and resistance to loosening under high loads. Their fine-pitch thread offers increased strength and vibration resistance.
This thin hexagon nut is used where space is limited, such as on the tie rod ends. In the Steering Axle Assembly, it is made of zinc-plated steel with a fine-pitch thread, providing a secure locking mechanism while maintaining a low profile to avoid interference with other components.
This screw is used to adjust the bearing preload or toe-in settings. In the Steering Axle Assembly, it is a precision-ground threaded component with a locknut, allowing fine adjustment of the steering geometry for optimal tire wear and handling characteristics.
The Left Steering Tie Rod Arm connects the tie rod to the left steering knuckle. In the Steering Axle Assembly, it is a forged steel component with tapered ball joints, transmitting steering force from the drag link to the wheel. Its robust construction ensures precise steering response and long durability.
The Right Steering Tie Rod Arm is the symmetric counterpart to the left arm, connecting the tie rod to the right steering knuckle. In the Steering Axle Assembly, it shares the same forged steel construction and precise engineering, ensuring balanced steering performance across the front axle.
These large M20 fine-pitch bolts secure the tie rod arms to the steering knuckles. In the Steering Axle Assembly, they are grade 12.9 with a zinc-nickel coating, providing the highest level of clamping force and durability for critical steering connections.
The Right Steering Knuckle Assembly mirrors the left knuckle, providing symmetrical steering and wheel mounting for the right side. In the Steering Axle Assembly, it is identical in construction and precision, ensuring balanced handling and consistent performance across the front axle.
The Steering Tie Rod Assembly is the main link between the left and right steering knuckles. In the Steering Axle Assembly, it consists of a heavy-duty steel tube (φ50mm diameter) with adjustable tie rod ends, allowing precise toe-in adjustment. Its robust construction ensures reliable steering response and long service life.
This high-performance grease is used for lubricating the kingpin bearings, tie rod ends, and other moving parts of the Steering Axle Assembly. Formulated with extreme-pressure additives and rust inhibitors, it provides excellent protection against wear and corrosion, ensuring smooth operation and extended component life.
The Steering Axle Assembly is engineered with heavy-duty forged components and precision bearings, capable of supporting the full weight of the vehicle while providing precise steering control. This ensures long service life and reliable performance even under the most demanding operating conditions.
This Steering Axle Assembly kit includes every component needed for a full front axle rebuild – from the front beam and kingpins to all bearings, seals, shims, and fasteners. No additional parts are required, simplifying installation and ensuring compatibility.
The Steering Axle Assembly is manufactured to the exact OEM specifications, ensuring precise geometry and smooth steering operation. The included shims allow fine adjustment of bearing preload, resulting in accurate wheel alignment and reduced tire wear, enhancing vehicle stability and driver comfort.
All components of the Steering Axle Assembly are manufactured from premium materials with advanced corrosion-resistant coatings. This ensures reliable performance over the life of the vehicle, reducing maintenance costs and downtime, and providing peace of mind for fleet operators.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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