KC2203030232 Fast Speed Dual Pump Countershaft Assembly is an original OEM part for Sinotruk, integrating main shaft, drive gears, bearings and dual-pump oil circuit components with high assembly precision and strictly controlled fitting clearance. Made through quenching, tempering and carburizing processes, it boasts high gear surface hardness, outstanding wear and fatigue resistance, keeping free from tooth breakage and looseness under long-term heavy-load operation. The dual-pump synchronous oil supply structure matches the original hydraulic system, delivering stable power transmission and smooth gear shifting. With strict OEM process and quality inspection, it features precise dimensional tolerance and easy disassembly. Suitable for Howo, Sitrak and other models, it is corrosion-resistant, anti-aging and keeps stable performance in long-term service.