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The WG2210040137 is designed to handle extreme low‑end torque during climbing, with optimized tooth profile reducing stress concentration.
Case‑hardened depth of 1.2‑1.6 mm ensures superior wear resistance. The WG2210040137 core remains tough to absorb shocks.
Teeth are profile‑ground to DIN 6 quality, ensuring quiet operation and perfect meshing with the main shaft mating gear. Every Climb Gear Of Main Shaft is 100% runout‑tested.
Field tests demonstrate that the WG2210040137 lasts over 500,000 km under normal operating conditions, reducing downtime.
The Climb Gear Of Main Shaft replaces original part numbers AZ9713720014 / 121006600231 and is fully interchangeable with earlier HOWO versions. Always confirm spline count (14T) before ordering.
The Climb Gear Of Main Shaft is forged from high‑purity 20CrMnTiH alloy, followed by normalizing and rough machining. It undergoes carburizing at 920°C to achieve a fine martensitic case, then tempered for dimensional stability. The final grinding operation ensures tooth profile accuracy within 0.02 mm.
Every gear is inspected with magnetic particle and ultrasonic testing to eliminate subsurface defects. The Climb Gear Of Main Shaft meets or exceeds Sinotruk’s strict quality standard Q/ZZ 208‑2019.
Genuine Sinotruk Howo parts like the WG2210040137 climb gear are engineered with exact metallurgy and heat treatment specifications. Aftermarket copies often use lower‑grade steel, leading to pitting and premature failure. With genuine Climb Gear Of Main Shaft, you get full traceability, consistent tooth geometry, and the backing of the original manufacturer. It directly contributes to lower operating costs and higher resale value of your HOWO vehicle.
The climb gear, designated WG2210040137, is not only used in standard highway trucks but also in severe‑duty dump trucks and concrete mixers. Its robust construction allows repeated engagement of the low‑speed ratio without overheating. Fleet operators report that replacing worn gears with genuine Climb Gear Of Main Shaft reduces fuel consumption by up to 3% due to lower friction losses.
Q: Is the Climb Gear Of Main Shaft compatible with automatic transmissions?
A: No, it is designed for manual transmissions of the HOWO series. For automatic models, please consult our catalog for the correct part.
Q: What is the difference between WG2210040137 and WG2210040138?
A: WG2210040137 is the climb gear (low speed) while WG2210040138 is the high‑speed gear on the same shaft. They are not interchangeable.
Q: Can I replace just the climb gear without replacing the mating gear?
A: It is recommended to replace both as a set to ensure correct wear pattern and avoid noise. However, if the mating gear is in excellent condition, you may install only the Climb Gear Of Main Shaft after careful backlash inspection.
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