Countershaft Fourth Gear AZ2210030034/7 for HOWO Transmission
The AZ2210030034/7 countershaft fourth gear is an essential transmission component specifically engineered for HOWO heavy-duty trucks. As a critical link in the powertrain system, this precision-engineered gear facilitates smooth transitions between gear ratios, ensuring optimal torque delivery to the wheels. Designed to withstand the rigorous demands of commercial transportation, the countershaft fourth gear operates under high-stress conditions while maintaining consistent performance. Its optimized tooth profile minimizes friction and heat generation, extending the lifespan of both the component and the entire transmission system. The AZ2210030034/7 maintains strict manufacturing tolerances through CNC machining processes, ensuring perfect meshing with adjacent gears under varying load conditions common in HOWO commercial vehicles.
Performance Features
Engineered for durability in demanding conditions, the countershaft fourth gear AZ2210030034/7 incorporates advanced metallurgical properties that significantly reduce wear patterns. Manufactured from case-hardened alloy steel, the component undergoes specialized heat treatment processes to achieve optimal surface hardness while maintaining a tough, fracture-resistant core structure. This combination allows the gear to absorb shock loads during sudden acceleration or deceleration scenarios common in heavy truck operations. The helical tooth design incorporated in this gear promotes gradual engagement, dramatically reducing gear whine and transmission noise levels in HOWO cabs for improved driver comfort. Each AZ2210030034/7 gear undergoes meticulous quality validation to ensure perfect tooth alignment and uniform hardness distribution across contact surfaces.
Installation & Compatibility
The AZ2210030034/7 replacement part is precision-machined to match the OEM specifications of HOWO transmission systems, ensuring direct interchangeability without modifications. Installation requires standard transmission overhaul procedures, where proper preload adjustment and bearing seating are critical for maximum longevity. Compatible with multiple HOWO series including T5G, A7, and TX platforms, this gear integrates seamlessly with existing countershaft assemblies and bearing configurations. Special attention has been given to backlash tolerances in the AZ2210030034/7 design to compensate for minor variations in housing wear, extending service intervals. Using the genuine AZ2210030034/7 countershaft fourth gear eliminates compatibility concerns with mating components, preserving the transmission’s original performance characteristics.
Durability Advantages
Superior fatigue resistance defines the AZ2210030034/7 gear, engineered to withstand over 500,000 load cycles in rigorous testing simulations. The proprietary surface finishing process reduces microscopic stress risers along tooth flanks, substantially delaying the onset of pitting and spalling failures. Zinc phosphate coating provides corrosion protection during operation, particularly important in harsh environmental conditions where road chemicals and moisture accelerate component degradation. Thermal stability is another key feature of the AZ2210030034/7, maintaining dimensional integrity across the operational temperature spectrum experienced in HOWO transmissions under heavy towing conditions.
Operational Benefits
Fleet operators consistently report measurable improvements in fuel efficiency after replacing worn gears with the genuine AZ2210030034/7 countershaft component. The optimized gear geometry reduces parasitic power loss through minimized friction surfaces, translating directly to reduced fuel consumption per mile. Driver feedback indicates noticeably smoother shifts into fourth gear compared to aftermarket alternatives, attributed to the precisely engineered chamfers and crown modification on the AZ2210030034/7 gear teeth. By maintaining proper gear meshing alignment throughout its service life, this component prevents premature wear on synchronizer rings and needle bearings, extending the overall transmission lifespan beyond typical maintenance intervals. The AZ2210030034/7 significantly reduces vibration transmission to the cabin at highway speeds, contributing to reduced operator fatigue during long hauls.
Quality Assurance
Every AZ2210030034/7 countershaft fourth gear undergoes comprehensive inspection protocols that exceed industry standards. Coordinate measuring machines (CMM) verify all critical dimensions within 0.005mm tolerance, ensuring perfect interchangeability and meshing characteristics. Non-destructive testing including fluorescent penetrant inspection identifies potential subsurface flaws that could compromise integrity under stress. Batch traceability allows tracking of material composition and heat treatment parameters for each AZ2210030034/7 unit delivered, providing complete quality documentation for fleet maintenance records. Before shipment, each gear is preserved with anticorrosive compounds that protect surfaces during storage and transit without interfering with lubrication adhesion during operation.
Maintenance Guidelines
Proper lubrication is paramount for maximizing the service life of the AZ2210030034/7 countershaft fourth gear in HOWO transmissions. Always use manufacturer-approved transmission fluids that meet the specific frictional requirements for synchronized gearboxes. During transmission reassembly, verify bearing preloads and endplay values using calibrated torque wrenches and dial indicators to prevent excessive stress concentrations on the AZ2210030034/7 gear teeth. Post-installation break-in procedures recommend varying speed and load conditions for approximately 500 miles to allow optimal mating surface adaptation. Regular fluid analysis at scheduled intervals provides early warning of potential wear issues involving the AZ2210030034/7, enabling proactive maintenance before secondary damage occurs to adjacent transmission components.
Technical Specifications
The AZ2210030034/7 features 27 helical teeth with a 19¡ã pressure angle optimized for balanced strength and noise reduction. The hardened case depth ranges from 0.8-1.2mm with a core hardness of 38-42 HRC and surface hardness of 58-62 HRC achieved through precise carburizing control. Backlash tolerance is maintained between 0.08-0.13mm when properly installed with matching gear components. Total weight of the gear is approximately 2.7kg with an outer diameter of 184mm. The component interfaces with 75mm diameter tapered roller bearings designed for high thrust capacity without deformation. Optimal lubrication requires proper clearance between the gear teeth and the AZ2210030034/7’s journal surfaces.
Application Scope
The AZ2210030034/7 countershaft fourth gear serves as a critical powertrain component across various HOWO truck applications including dump trucks, tractor units, and specialized chassis configurations. Its design accommodates torque inputs ranging from 1,000 Nm to 2,500 Nm based on engine variants coupled to the transmission system. Engineered compatibility extends to different axle ratios and rear axle configurations commonly found in the HOWO product lineup. Beyond original equipment applications, the AZ2210030034/7 is specified for remanufacturing programs where worn components are replaced during transmission overhaul operations. The gear’s design integrity is maintained across altitude variations and climatic extremes typically encountered by HOWO fleets operating in mountainous terrains and desert conditions where temperature differentials exceed 70¡ãC.
Cost-Effectiveness
While competitive in initial purchase price, the true economic value of the genuine AZ2210030034/7 manifests through extended service intervals and reduced secondary component failures. Transmission rebuild frequency decreases by approximately 40% when compared to non-genuine alternatives based on fleet maintenance data analysis. Operators avoid costly vehicle downtime since the AZ2210030034/7 maintains precise transmission operation beyond typical replacement schedules. Comprehensive warranty coverage backs every genuine gear purchase, protecting against manufacturing defects that could cause operational disruption. Secondary benefits include lower inventory requirements due to the extended service life of the AZ2210030034/7, reducing fleet parts inventory overhead by consolidating purchases.
“The OEM AZ2210030034/7 component restored original transmission performance with remarkable longevity compared to other aftermarket options we’ve tested. Its precision engineering eliminated the gear whine issues we previously experienced in our fleet.” – HOWO Fleet Maintenance Manager
Support & Availability
Global parts distribution centers maintain sufficient inventories of the AZ2210030034/7 to support immediate delivery requirements for repair facilities. Priority shipping options ensure critical spare parts availability within 24-48 hours to most locations worldwide. Technical support teams provide specialized installation guidance for complex transmission repair scenarios involving the AZ2210030034/7 component. Dedicated customer service representatives assist with part number verification and compatibility queries related to specific HOWO transmission models. Regional warehouses implement climate-controlled storage to maintain the superior surface integrity of the AZ2210030034/7 during extended storage periods.
