Countershaft Third Gear for HOWO Truck – AZ2210030033/7

Countershaft third gear for HOWO transmission
HOWO truck countershaft gear
Gear component for SINOTRUK

The AZ2210030033/7 countershaft third gear is an essential transmission component specifically engineered for
HOWO
heavy-duty trucks. As a critical element in the gear assembly system, this precision-engineered part ensures optimal power transfer between gears, significantly enhancing drivetrain efficiency.
HOWO
operators worldwide rely on this OEM-grade gear for its uncompromising durability and perfect compatibility with A7-series transmissions. The helical tooth design reduces operational noise while maximizing surface contact area, extending component lifespan even under extreme hauling conditions.


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Superior Engineering for Heavy-Duty Performance

Manufactured to exacting SINOTRUK specifications, the countershaft third gear undergoes advanced heat treatment processes that achieve optimal surface hardness (58-62 HRC) while maintaining a tough, impact-resistant core. This metallurgical balance prevents premature tooth wear and pitting – common failure points in aftermarket alternatives. The gear’s macro-geometry conforms to original tolerances within 0.005mm, ensuring vibration-free meshing with synchronizer assemblies and eliminating power loss common in poorly machined components.

Enhanced Operational Efficiency

When installed in HOWO transmissions, this helical-cut gear provides 17% broader contact patterns compared to spur gears, distributing operational stresses more evenly across tooth surfaces. The optimized pressure angle minimizes axial thrust forces on transmission bearings, significantly extending overall assembly longevity. Fleet managers document 18-22% reduction in transmission-related downtime after installing genuine AZ2210030033/7 gears, with service intervals extending beyond 500,000 km in typical long-haul applications.

Compatibility and Installation

Designed as direct replacements for original components in HOWO A7, T7, and T5G transmission systems (2014-2022 models), this gear requires no modifications or adaptation kits. The precision-ground splines guarantee perfect alignment with countershaft assemblies, eliminating the need for shimming or resealing during installation. Maintenance technicians appreciate the pre-lapped surface finish that eliminates break-in requirements, allowing immediate return to service at full operational capacity.

Quality Assurance Standards

Every countershaft third gear undergoes magnetic particle inspection to detect subsurface flaws and coordinate-measuring machine verification of critical dimensions. Production batches are traceable through laser-etched identifiers matching original documentation. These stringent protocols ensure each component delivers original-equipment performance while meeting the AZ2210030033/7 OEM standard required for warranty compliance.

Application-Specific Design Features

The asymmetric tooth profile compensates for deflection under high-torque conditions, maintaining optimal contact patterns even during extreme hill starts with maximum payloads. Oil retention grooves machined into the gear face ensure constant lubrication during high-RPM operations, a critical feature during extended downhill engine braking. These design refinements result in 40% lower operating temperatures than generic alternatives, dramatically reducing thermal degradation of transmission fluids.

Material Specifications

  • ? SAE 8620H alloy steel core
  • ? Case-hardened surface layer
  • ? Sulfurized coating (5-8¦Ìm)

Performance Advantages

  • ? 22% higher fatigue strength
  • ? 0.2dB noise reduction
  • ? 15¡ãC lower operating temps

Operational Longevity Factors

Proprietary shot-peening techniques induce compressive stresses in tooth root areas, increasing resistance to bending fatigue by approximately 30%. The precisely controlled carburizing process creates an optimal 1.2-1.5mm case depth that prevents spalling under shock loads. These manufacturing techniques combine to deliver wear characteristics that consistently outperform competing solutions by a factor of three in accelerated life testing protocols.

Global Logistics Support

We maintain strategically located distribution centers across five continents to deliver the authentic AZ2210030033/7 countershaft third gear within 72 hours of order confirmation. Each shipment includes OEM-matched installation instructions and material certification documentation. Comprehensive technical support remains available throughout the product lifecycle, from pre-installation consultations to operational optimization guidance.

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