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The AZ2210040747 sleeve is a genuine SINOTRUK HOWO component engineered to provide precise axial spacing and alignment within the transmission gear train. As a critical element of the trusted Sinotruk howo parts family, this sleeve ensures correct gear positioning, reducing end‑play and preventing premature wear of synchronizers and bearings. Manufactured from high‑strength alloy steel with precision‑ground inner and outer diameters, the AZ2210040747 sleeve maintains exacting tolerances under heavy loads and thermal expansion. Its case‑hardened surface resists galling and fretting, guaranteeing long‑term reliability in the demanding environments of mining, construction, and long‑haul applications. Investing in this authentic component ensures smooth shifting and extended transmission life.
Sleeve
Втулка
Manguito
The AZ2210040747 sleeve is precision‑machined from high‑quality alloy steel (20MnCr5) and then case‑carburized to a depth of 0.8‑1.2 mm, achieving a surface hardness of 58‑62 HRC. This heat treatment provides exceptional resistance to wear and plastic deformation under high contact pressures. The inner and outer diameters are ground to tight tolerances (IT6), ensuring accurate fit on shafts and in bores. The sleeve also features carefully chamfered edges to facilitate assembly and prevent damage to seals or bearings during installation.
Each AZ2210040747 sleeve is 100% inspected for dimensional accuracy, including concentricity, roundness, and surface finish. The part is also subjected to magnetic particle inspection to ensure freedom from cracks or material defects. This rigorous quality control guarantees that the sleeve will maintain correct gear spacing under all operating conditions, reducing noise and vibration while extending the life of adjacent components.
The table below provides detailed technical data for the genuine SINOTRUK HOWO AZ2210040747 sleeve. These specifications are essential for verifying compatibility.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | AZ2210040747 | SINOTRUK HOWO Original Code |
| Product Name | Sleeve (Spacer) | For transmission gear positioning |
| Material | 20MnCr5 alloy steel | Case‑hardened |
| Outer Diameter | 75.0 mm | h6 tolerance |
| Inner Diameter | 60.0 mm | H7 tolerance |
| Length | 32.5 mm | ±0.1 mm |
| Surface Hardness | 58‑62 HRC | Case depth 0.8‑1.2 mm |
| Core Hardness | 30‑38 HRC | Toughness |
| Surface Finish (Ra) | ≤ 0.8 µm | On functional surfaces |
| Concentricity | ≤ 0.03 mm | ID to OD |
| Applicable Transmissions | HW19710, HW19712, HW25716 | Specific gear positions |
| Included Components | Sleeve only | Check service manual |
The AZ2210040747 sleeve is used in Howo 9‑speed and 16‑speed manual transmissions, including the HW19710, HW19712, and HW25716 series. It is typically installed on the main shaft or countershaft to maintain precise axial positioning of gears, ensuring correct engagement with synchronizers and preventing end‑float that can lead to gear clash and premature wear. Proper spacing is critical for the transmission to handle high torque loads without binding or excessive clearance.
In heavy‑duty applications such as mining and construction, the transmission experiences constant shock loads and temperature variations. The AZ2210040747 sleeve must maintain its dimensions and hardness to avoid loosening or deformation. Genuine SINOTRUK HOWO sleeves are engineered to withstand these conditions, ensuring that gear alignment remains within specification for hundreds of thousands of kilometers. Using an inferior sleeve can result in misalignment, increased noise, and accelerated wear of gears and bearings.
When rebuilding a transmission, always measure the end‑play of gear assemblies and replace sleeves if they show signs of wear or if the clearance exceeds service limits. Use new retaining rings as required.
Correct installation of the AZ2210040747 sleeve is essential to ensure proper gear spacing and transmission function. Follow these steps:
Clean the shaft and bore thoroughly, removing any burrs or debris. Inspect the surfaces for damage. Lightly oil the sleeve to ease installation.
Slide the sleeve onto the shaft or into the bore by hand. If interference fit is required, use an arbor press and a suitable driver that contacts only the sleeve end. Ensure it seats fully against the shoulder.
After assembly, measure the end‑play of the gear stack. Rotate the gears to ensure smooth operation. Secure any retaining rings correctly.
A worn or damaged sleeve can cause excessive gear movement and transmission noise. Common signs that replacement is needed include:
If any of these symptoms are observed, immediate replacement with a genuine AZ2210040747 sleeve is recommended. Ignoring sleeve wear can lead to gear tooth damage and costly transmission overhauls.
The tight tolerances ensure correct gear positioning, reducing wear and improving shift quality.
By maintaining correct clearances, the genuine sleeve prevents premature bearing and gear failure, reducing downtime.
Case‑hardened alloy steel provides superior wear resistance and dimensional stability under load.
To maximize the service life of your AZ2210040747 sleeve, follow these best practices:
By adhering to these guidelines, you ensure that the AZ2210040747 sleeve performs optimally throughout its intended service interval.
Aftermarket sleeves are often made from lower‑grade steel with inconsistent hardness and poor dimensional control, leading to rapid wear and incorrect gear spacing. The genuine AZ2210040747 is manufactured to the exact specifications of the original equipment, using premium alloy steel and precise heat treatment. Each sleeve is inspected for hardness, concentricity, and surface finish, guaranteeing that it will perform exactly as the original part.
By choosing authentic SINOTRUK HOWO parts, you protect your investment and ensure your truck maintains its reliability and resale value. The Sinotruk howo parts catalog includes a full range of transmission and chassis components engineered for maximum durability. For fleet managers and owner‑operators who demand the best, the genuine AZ2210040747 is the only responsible choice.
The AZ2210040747 sleeve is used across a wide range of Howo models: T7H, A7, and classic Howo‑7 series equipped with HW19710, HW19712, and HW25716 transmissions. Always verify the position and dimensions using the service manual; different gear positions may use different sleeves.
Each AZ2210040747 is individually wrapped in VCI paper to prevent rust. The packaging is clearly labelled with the OEM number and batch code. For bulk orders, sleeves are shipped in sealed cartons with foam inserts to avoid transit damage.
Production of the AZ2210040747 takes place in IATF 16949 certified facilities, using CNC turning and grinding with in‑process gauging. Statistical process control ensures that dimensional variations are kept to a minimum, far exceeding the requirements of the original design. Every batch is accompanied by a material certificate and hardness test report, guaranteeing that the sleeves delivered are identical to those fitted on new Howo trucks at the factory.
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