SINOTRUK HOWO 501328744 Sleeve – Critical Chassis Protection for Maximum Driveline Reliability

501328744 Sleeve – Engineered for Precision Fit and Long-Term Protection

The 501328744 Sleeve is a precision-machined cylindrical component designed to fit over shafts or within housings to provide a wear-resistant surface, restore correct clearances, or protect against friction and corrosion. This sleeve is typically used in driveline applications such as transmission output shafts, axle pinion shafts, or power take-off (PTO) assemblies where rotating components experience high loads and relative motion.

Manufactured from high-grade alloy steel with a controlled hardening process, the 501328744 sleeve offers a surface hardness of HRC 55–60, ensuring excellent resistance to abrasion, galling, and fretting wear. The internal bore and external diameter are ground to precise tolerances, guaranteeing a snug fit with mating components and proper alignment of seals and bearings.

Designed as a direct OEM replacement, the 501328744 ensures that your HOWO chassis retains its factory shaft-to-bore clearances, preventing premature seal failure, bearing overload, and shaft scoring. The sleeve’s surface finish is optimized to provide an ideal running surface for lip seals and bushings, effectively containing lubricants and excluding contaminants.

With the 501328744, SINOTRUK HOWO delivers a new standard of reliability for critical sleeve applications. Every unit is inspected for dimensional accuracy, surface finish, and hardness consistency, ensuring that each sleeve provides dependable protection and contributes to the overall durability of the driveline system.

Technical Specifications – 501328744 Sleeve

Key Advantages of the 501328744 Sleeve

Versatile Applications for the 501328744 Chassis Sleeve

The 501328744 Sleeve is used in critical driveline areas where rotating shafts interface with seals, bearings, or housings. Its robust design makes it ideal for:

• Transmission Output Shaft Sealing – Provides a durable wear surface for lip seals, preventing oil leaks and maintaining lubrication integrity.
• Axle Pinion Bearing Support – Protects the pinion shaft from fretting and wear at the bearing inner race interface, extending axle life.
• Power Take-Off (PTO) Assemblies – Shields PTO shafts from abrasive wear and ensures smooth engagement with drive components.
• Hydraulic Pump Drives – Provides a hardened surface for pump shaft seals, reducing leakage and maintaining hydraulic system efficiency.

Whether you are performing scheduled driveline maintenance or repairing a worn component, the 501328744 sleeve is an essential part of keeping your SINOTRUK HOWO truck operating reliably and efficiently.

Compatibility & Integration – 501328744 with SINOTRUK HOWO Driveline Systems

The 501328744 Sleeve is designed as a direct OEM replacement for use in SINOTRUK HOWO heavy-duty trucks equipped with ZF, FAST, or HOWO-branded transmissions and axles.

It fits seamlessly into HOWO A7, T7H, and classic 6×4 and 8×4 chassis, ensuring quick and accurate installation with standard workshop tools. The sleeve’s press-fit design allows for simple replacement without requiring special equipment, reducing maintenance time.

The sleeve’s internal and external dimensions are produced to exact OEM blueprints, guaranteeing proper interference fit and correct positioning of seals and bearings. This ensures that lubricants are retained and contaminants are excluded, maintaining the integrity of the driveline system.

For parts distributors and workshops, the 501328744 simplifies inventory management by covering multiple HOWO variants, reducing the need for multiple sleeve part numbers and ensuring quick service turnaround.

Quality Assurance & Durability of the 501328744 Sleeve

Every 501328744 Sleeve is manufactured under strict quality control, from raw material certification to final inspection and packaging.

SINOTRUK HOWO employs advanced metrology equipment, including coordinate measuring machines (CMM) and surface finish testers, to verify that each sleeve meets the specified dimensional and surface quality requirements.

Each unit is inspected for internal and external diameter, roundness, and hardness consistency, ensuring that the sleeve is free from defects and ready for immediate installation.

The heat-treatment process is precisely controlled to achieve the optimal hardness-depth profile, balancing wear resistance with toughness to prevent cracking under impact loads.

With a proven service life exceeding 200,000 kilometers under normal operating conditions, the 501328744 is a trusted choice for fleets worldwide, backed by SINOTRUK HOWO’s commitment to quality and reliability.

Why Choose the 501328744 Sleeve for Your HOWO Truck?

The 501328744 Sleeve may be a simple component, but its role in protecting your driveline is invaluable. By choosing this genuine OEM sleeve, you ensure that your SINOTRUK HOWO vehicle continues to operate with minimal friction, reduced wear, and maximum reliability.

Installing a high-quality, factory-spec sleeve prevents shaft scoring, seal leakage, and bearing damage, all of which can lead to costly repairs and unplanned downtime. The precision-ground surface and corrosion-resistant coating also contribute to lower maintenance costs and longer component life.

Fleet managers will appreciate the reduced driveline-related failures and simplified parts inventory, while owner-operators gain peace of mind from a component that is engineered to the highest standards and backed by a comprehensive warranty.

When you need a sleeve that delivers precision fit, superior wear resistance, and long-term reliability, the 501328744 is the definitive choice. Equip your HOWO truck with this essential chassis component and experience the difference that genuine OEM quality makes in driveline performance and uptime.