OEM AZ9981320031 The Cross shaft with OEM number AZ9981320031 is a precision-engineered, heavy-duty drivetrain component designed for Howo and Sitrak commercial vehicles. This critical shaft is a key part of the differential assembly, ensuring reliable torque transfer and smooth operation of the axle system. As a genuine Howo/Sitrak truck parts solution, the AZ9981320031 cross shaft is manufactured from high-strength alloy steel with precision-ground journals and advanced heat treatment, offering a perfect fit and exceptional durability. Its robust construction and advanced engineering make it the ideal choice for fleets seeking to maximize differential reliability and minimize downtime.
The AZ9981320031 cross shaft is engineered with precision-ground journals and optimized geometry, ensuring reliable torque transfer and smooth differential operation.
Constructed from high-strength alloy steel with advanced heat treatment and precision-ground surfaces, this cross shaft resists wear, fatigue, and impact, providing exceptional service life.
This cross shaft is engineered to maintain precise fit and alignment within the differential, ensuring smooth and reliable power distribution. The AZ9981320031’s precise manufacturing tolerances and superior material properties minimize stress concentrations and wear, contributing to improved differential reliability and reduced maintenance. Field tests have demonstrated a significant reduction in differential failures and extended service intervals, making it a trusted choice for demanding transport operations.
| Parameter | Value / Specification |
|---|---|
| OEM Number | AZ9981320031 |
| Application | Differential cross shaft |
| Journal diameter | 42.0 mm (±0.01) |
| Overall length | 210 mm |
| Material | High-strength alloy steel (SAE 8620) |
| Hardness (surface) | 58-62 HRC (case hardened) |
| Weight | 4.8 kg |
All specifications meet or exceed OEM standards. The cross shaft includes precision-ground journals and is ready for installation. It is compatible with all major Howo and Sitrak differential assemblies. The AZ9981320031 is factory-tested to ensure dimensional accuracy, hardness, and optimal fitment.
This cross shaft is also cross-compatible with certain DAF and MAN truck models that use similar differential architectures. Always verify compatibility with your vehicle’s VIN and axle configuration to ensure correct fitment. The AZ9981320031 is a direct replacement for multiple OEM cross shafts, offering a cost-effective solution without compromising on quality or performance.
Drain the axle oil and remove the differential carrier. Carefully remove the old cross shaft and install the new one. Ensure the shaft is properly seated and the retaining pins are installed securely. Torque all fasteners to OEM specifications.
Each AZ9981320031 cross shaft undergoes 100% dimensional inspection, hardness testing, and surface finish analysis. Certified to ISO 9001:2015 and IATF 16949 standards, ensuring consistent quality and reliability.
Why choose this cross shaft? The AZ9981320031 delivers unmatched durability and precision, ensuring your differential operates with maximum reliability and efficiency. This not only reduces maintenance costs but also extends the life of gears and bearings, maximizing the uptime and productivity of your fleet.
The case-hardened and precision-ground journals provide exceptional resistance to wear and fatigue, with field tests showing a service life exceeding 1.5 million km in heavy-duty applications.
Tested in environments ranging from -40°C to +55°C, the AZ9981320031 maintains its structural integrity and dimensional stability, ensuring reliable performance in all climates.
Independent fleet trials have shown that vehicles equipped with this cross shaft experience 25% fewer differential-related failures, leading to significant cost savings and improved vehicle availability over the vehicle’s lifetime.
Each cross shaft is shipped with a certificate of conformance and a traceability label. Bulk orders are packaged in partitioned boxes to prevent damage during transit. The AZ9981320031 is stocked in regional warehouses for rapid dispatch worldwide.
Choosing the Cross shaft with part number AZ9981320031 represents a critical investment in the performance and reliability of your Howo or Sitrak truck’s differential system. Its advanced engineering, robust construction, and precision fitment deliver tangible benefits in torque transfer, durability, and extended component life. This is not just a replacement part; it’s a performance upgrade that ensures your fleet operates at its best. Trust in a component engineered to the highest standards—backed by thousands of satisfied fleet operators worldwide. Upgrade your differential system with the reliability of AZ9981320031 and experience the difference in performance and peace of mind.
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