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The wiper motor assembly is the core driving component of the truck windshield cleaning system. The key components are: permanent magnet DC motor (core power source, usually 12V/24V), reduction gearbox (converts high speed into high torque), automatic reset mechanism (ensures that the wiper blade stops at the specified position), intermittent control module (optional, used for variable interval wiper)
Maintenance recommendations: Clean the motor carbon powder every 2 years, and check the drainage trough for blockage before the rainy season. The design life of this assembly is usually synchronized with the vehicle, but the actual replacement cycle is significantly affected by the use environment.
link:https://www.onodetruckparts.com/search/Wiper%20Blades.html
Heavy Truck Spare Parts Wiper Motor Assembly Dz15221740009 81.26401.6130