OEM WG2229040073
Experience the robust performance of the WG2229040073 Main Shaft Gear Block Slice, a critical drivetrain component engineered for SINOTRUK Howo trucks. This genuine part is an integral part of our premium Sinotruk howo parts portfolio, manufactured from case‑hardened alloy steel to withstand extreme loads and continuous heavy‑duty operation. The WG2229040073 gear block slice ensures precise gear engagement on the main shaft, delivering smooth shifting and long‑term durability.
| Parameter | Specification |
|---|---|
| OEM Number | WG2229040073 |
| Product Name | Main Shaft Gear Block Slice |
| Brand / Series | SINOTRUK Howo genuine |
| Material | 20MnCr5 case‑hardened alloy steel |
| Tooth Hardness | 58‑62 HRC |
| Number of Teeth | 23 (engagement spline) |
| Module | 3.75 mm |
| Weight | 2.4 kg |
| Heat Treatment | Carburized & quenched |
| Compatible Models | Howo A7, T7H, ZZ4257, ZZ1257 |
Carburized to a depth of 0.8‑1.2 mm, the gear slice achieves extreme surface hardness while maintaining a tough core that absorbs shock loads without cracking.
After heat treatment, the tooth profiles are ground to AGMA Class 10 quality, ensuring smooth engagement and perfect load distribution across the gear face.
Engineered to handle peak torque loads, this gear block slice reliably transfers power in the most demanding heavy‑duty applications.
Every gear slice is subjected to magnetic particle inspection and coordinate measuring machine verification to ensure zero defects.
This gear block slice is a direct replacement for the following SINOTRUK Howo transmissions and vehicle series:
The WG2229040073 main shaft gear block slice is manufactured from high‑quality 20MnCr5 alloy steel, which is then precision machined and heat‑treated to achieve the optimal balance of surface hardness and core toughness. The gear teeth are carburized in a controlled atmosphere furnace, producing a wear‑resistant case while maintaining a ductile core that can absorb shock loads without fracturing. After carburizing, it undergoes a quenching and tempering process to refine the grain structure and relieve internal stresses. Finally, the teeth are profile‑ground to achieve the exact geometry required for quiet, efficient operation. This meticulous process ensures that this critical component meets or exceeds the original equipment specifications.
In heavy‑duty transmissions, the main shaft gear block slice is responsible for engaging the various speed gears. It must transmit engine torque reliably under all conditions, from start‑stop city traffic to sustained highway cruising. This gear is designed to handle the full torque output of Howo engines, which can exceed 2,100 Nm in modern turbocharged diesels. Its robust construction and precise tooth profile minimize power loss and ensure that every shift is crisp and positive. Fleet operators who have switched to this genuine part report fewer transmission failures and extended service intervals, directly impacting their bottom line.
Installation of the WG2229040073 gear block slice should be performed by a qualified technician using proper tools. The gear must be positioned correctly on the main shaft and secured with the appropriate retaining rings. It is recommended to replace all associated bearings and thrust washers at the same time to ensure optimal alignment and longevity. After installation, the transmission should be run‑in according to the manufacturer’s guidelines. Using genuine parts ensures that all clearances and tolerances are maintained, preventing premature wear and costly downtime.
The quality control for this gear includes 100% inspection of critical dimensions using coordinate measuring machines (CMM). Every gear is also tested for surface hardness and case depth. Samples from each production batch undergo dynamometer testing to verify load capacity and noise levels under simulated operating conditions. These rigorous checks guarantee that the WG2229040073 you receive will deliver the same performance and durability as the original component installed in new Howo trucks.
Environmental sustainability is considered in the production of this gear. The steel used is sourced from mills with certified environmental management systems, and the heat treatment process uses energy‑efficient furnaces with minimal emissions. At the end of its long service life, the gear is fully recyclable, contributing to a circular economy. By choosing the genuine component, you are not only ensuring the reliability of your vehicle but also supporting responsible manufacturing practices.
For transmission rebuilders and fleet maintenance departments, the WG2229040073 gear is available individually or as part of a complete overhaul kit. Each gear is packaged in a heavy‑duty cardboard box with foam inserts to protect the precision‑ground teeth during shipping. A data sheet with the actual measured dimensions is included with each gear, providing full traceability. Bulk orders receive quantity discounts and can be shipped directly to your workshop from our regional distribution centers.
Field performance data collected from over 500 Howo trucks operating in various conditions (highway, off‑road, mining) shows that this gear has a mean time between failures (MTBF) exceeding 800,000 kilometers when properly maintained. This exceptional reliability is the result of superior metallurgy and precise manufacturing. Many fleet managers have standardized on this genuine part for all their transmission overhauls, reducing parts inventory complexity and ensuring consistent quality.
When ordering, please verify your vehicle’s transmission model and serial number to ensure correct fitment. The WG2229040073 gear is specifically designed for Howo HW19710 and HW19712 series transmissions. For other models, please consult our cross‑reference guide. Our technical team is available to answer any questions regarding compatibility, but please note that we do not provide direct contact information on this page as per our policy; instead, you may refer to the documentation included with the part or contact your local SINOTRUK dealer.
In summary, the WG2229040073 main shaft gear block slice represents the highest standard of quality and engineering for SINOTRUK Howo trucks. Its case‑hardened teeth, precision profile, and robust construction ensure smooth, reliable power transfer and extended transmission life. By choosing this genuine component, you protect your investment and keep your fleet on the road. Trust the WG2229040073 – the gear that heavy‑duty demands.
During transmission service, visually inspect the WG2229040073 gear for pitting, spalling, or discoloration. Check the engagement pattern with mating gears; uneven pattern may indicate worn bearings.
Use only the recommended transmission oil grade. Change oil at intervals specified in the owner’s manual to maintain proper lubrication and cooling.
Only the authentic WG2229040073 gear carries SINOTRUK’s material certification. Imitations often use low‑grade steel that wears quickly or shears under load, leading to gearbox failure. The genuine part is traceable to an ISO 9001 foundry, with 100% inspection. When you install this gear, you preserve the resale value of your Howo and avoid roadside failures. Fleet operators report that using the OEM component cuts unscheduled transmission repairs by 60%.
Preparation: Clean the main shaft and gear bore. Apply a light coat of assembly oil. Ensure the splines are free of burrs.
Positioning: Slide the gear block slice onto the main shaft, aligning the internal splines. Use a soft mallet if necessary. Verify proper seating against the shoulder.
After installation, check end play and ensure that all retaining rings are fully seated. Rotate the assembly to confirm smooth operation without binding. Always replace the WG2229040073 if any damage is observed during disassembly.
Precision‑ground teeth ensure smooth meshing, reducing gear whine and improving driver comfort.
The gear maintains its hardness and dimensional stability even under prolonged high‑load, high‑temperature operation.
The steel used contains over 90% recycled content. Production scrap is also recycled, minimizing environmental footprint.
At end of life, the gear is 100% recyclable, supporting circular economy principles and reducing landfill waste.
Every WG2229040073 gear leaves the factory with a laser‑etched part number for full traceability. When you order from our official warehouse, you receive the latest design with improved root fillet geometry – a detail many suppliers ignore. Pair the gear with genuine SINOTRUK Howo bearings and seals for a 100% match.
To verify the authenticity of your WG2229040073, check the micro‑stamping on the gear face. Our global network ensures fast delivery to any heavy‑duty workshop. Trust this gear to keep your Howo powertrain operating at peak efficiency – it’s the component that makes the difference between average and exceptional performance.
WG2229040073 – 100% Genuine SINOTRUK Howo Main Shaft Gear Block Slice • Built for the long haul • No forms, just quality parts.
