OEM AZ9112410156
Ensure precise wheel control with the AZ9112410156 Knuckle (Left), a precision‑engineered steering component designed for SINOTRUK Howo heavy‑duty trucks. This genuine left‑side knuckle is a cornerstone of our premium Sinotruk howo parts portfolio. Manufactured from high‑strength nodular cast iron and precision‑machined, the AZ9112410156 knuckle provides the rigid foundation for the steering system, ensuring accurate geometry, long‑term durability, and reliable operation under extreme loads.
| Parameter | Specification |
|---|---|
| OEM Number | AZ9112410156 |
| Product Name | Steering Knuckle (Left) |
| Material | Nodular cast iron GGG‑50 |
| Hardness | 180‑220 HB |
| Kingpin Bore Diameter | 38 mm (finished) |
| Bearing Journal Diameter (inner) | 65 mm |
| Bearing Journal Diameter (outer) | 75 mm |
| Weight | 21.8 kg |
| Surface Finish | Black painted / machined surfaces |
| Compatible Models | Howo A7, T7H, ZZ4257, ZZ1257, HW19710 series |
Cast from GGG‑50 nodular iron, the knuckle delivers exceptional strength and ductility, absorbing shock loads from the road without cracking or deforming.
The kingpin bore is CNC bored and reamed to tight tolerances, ensuring perfect alignment with the kingpin and thrust bearings for minimal steering play.
Ground bearing journals provide ideal surfaces for tapered roller bearings, ensuring correct wheel bearing preload and long bearing life.
Every knuckle is crack‑tested to guarantee zero internal defects, ensuring safety and reliability in critical steering applications.
This left‑side steering knuckle is a direct replacement for the following SINOTRUK Howo front axle positions:
The AZ9112410156 steering knuckle (left) is a critical component in the front axle assembly of SINOTRUK Howo heavy‑duty trucks. It connects the axle beam to the wheel hub, allowing the wheels to pivot for steering while supporting the vehicle’s vertical load. Manufactured from high‑grade GGG‑50 nodular cast iron, the knuckle provides exceptional fatigue strength and impact resistance. The casting process is carefully controlled to achieve a dense, homogeneous structure, and every knuckle is stress‑relieved to eliminate internal tensions.
The kingpin bore is one of the most critical features of the AZ9112410156. It is rough‑bored, then finished by precision reaming to achieve a diameter of 38 mm with a tight tolerance. This ensures a perfect fit with the kingpin and allows the thrust bearings to operate with minimal clearance, eliminating steering wander and reducing tire wear. The bearing journals are ground to a fine surface finish, providing ideal seats for the inner and outer tapered roller bearings.
In heavy‑duty operation, the knuckle is subjected to immense forces – from the weight of the vehicle, steering inputs, and road shocks. The robust design of the AZ9112410156 ensures that it can withstand these forces without fatigue failure. The nodular iron construction also provides a degree of ductility, allowing the knuckle to absorb occasional overloads without cracking.
Installation of this knuckle requires specialized knowledge and tools. The knuckle must be fitted to the axle beam with new kingpins, bushings, and thrust bearings. The wheel bearings must be carefully adjusted to the correct preload using a torque wrench. After assembly, the steering stops must be adjusted to prevent tire‑to‑chassis contact at full lock. Always consult the service manual for specific procedures and torque values. Never reuse old kingpins or bearings when installing a new AZ9112410156 knuckle.
Quality control for the AZ9112410156 includes 100% dimensional inspection using coordinate measuring machines (CMM). Critical features such as the kingpin bore diameter, bearing journal diameters, and mounting hole positions are verified. Every knuckle is subjected to magnetic particle inspection to detect any surface or subsurface casting defects. Samples from each batch are also tested for tensile strength and hardness to ensure material compliance.
Environmental responsibility is integrated into production. The cast iron contains a high percentage of recycled scrap, and all machining swarf is collected and recycled. The foundry uses energy‑efficient melting furnaces with low emissions. At the end of its long service life, the knuckle is 100% recyclable as scrap iron.
For fleet maintenance departments, the AZ9112410156 steering knuckle is available individually or as part of a complete front axle rebuild kit that includes kingpins, bearings, seals, and thrust washers. Each knuckle is packaged in a protective foam‑lined crate to prevent damage during shipping. A certificate of conformance with actual measurement data is included with every shipment.
Field performance data collected from over 300 heavy‑duty trucks shows that this steering knuckle has a service life exceeding 800,000 kilometers when properly maintained. Its robust construction and precise machining significantly reduce the incidence of kingpin wear and steering wander, common issues with worn or inferior aftermarket knuckles.
When ordering, always verify your vehicle’s front axle model and confirm that the left‑side knuckle is required. The AZ9112410156 is specifically designed for the left side. For right‑side applications, consult the SINOTRUK parts catalog. Technical support is available through your local dealer – no contact details are listed here, in line with our policy.
In summary, the AZ9112410156 steering knuckle (left) represents the highest standard of quality and engineering for SINOTRUK Howo front axles. Its durable nodular iron construction, precision‑machined bores, and rigorous inspection ensure safe, reliable steering for the life of your vehicle. Trust this genuine component to keep your fleet on the road.
During routine service, inspect the AZ9112410156 knuckle for cracks, especially around the kingpin boss and bearing journals. Check for signs of corrosion or damage. Replace if any damage is found.
Grease kingpin bushings at every oil change. When replacing wheel bearings, pack them with high‑temperature wheel bearing grease and adjust preload correctly.
Only the authentic AZ9112410156 steering knuckle uses the exact nodular iron grade and heat treatment specified by SINOTRUK. Imitations are often made from lower‑grade materials that can crack under load or have poorly machined bores, leading to kingpin wear and steering instability. The genuine knuckle is 100% inspected and traceable to an ISO 9001 certified facility. Fleet data shows that OEM knuckles reduce front axle failures by 65%.
Preparation: Clean the axle beam and knuckle mating surfaces. Press in new kingpin bushings and ream to size. Lubricate all components with assembly grease.
Assembly: Position the AZ9112410156 knuckle on the axle, insert the kingpin, and torque the retaining bolts to spec. Install bearings, hub, and adjust preload.
After installation, perform a front‑end alignment to set toe‑in and verify steering angles. Check for any binding during full steering lock.
Precision kingpin bore and bearing journals eliminate play, providing accurate wheel control and reducing driver fatigue.
The nodular iron structure absorbs shock loads from potholes and curbs without cracking, ensuring long‑term durability.
Cast iron contains >90% recycled content; 100% of machining scrap is recycled.
At end of life, the knuckle is 100% recyclable, supporting a circular economy.
Every AZ9112410156 steering knuckle is laser marked with the part number for full traceability. When you order from our official distribution channel, you receive the latest production with enhanced bore finish for even longer life.
To verify authenticity, check the smooth cast finish and the precise part number stamping. Our global network ensures rapid delivery to any heavy‑duty workshop. Trust this steering knuckle to keep your Howo steering precise and your vehicle safe – it’s the foundation of reliable front axle performance.
AZ9112410156 – 100% Genuine SINOTRUK Howo Knuckle (Left) • Built for the long haul • No forms, just quality parts.
