The SM 5938 is an ultra-heavy-duty, complete Self Starter Motor Assembly specifically engineered for Sino Truck (Sinotruk) heavy-duty vehicles and machines powered by Weichai engines. Designed for the high-compression demands of large-displacement diesel platforms (like the WD615 series), this unit operates on a 24V system and features a 10-teeth (10T) pinion gear. It is built to provide reliable, high-torque cranking for long-haul logistics, mining, and construction trucks.