Dongfeng KL truck parts Washing process assembly 3747910-C3100

Equipped with a diaphragm-type washer pump, the assembly delivers a maximum pressure of 1.2 bar and a flow rate of 1.5 L/min—powerful enough to spray washer fluid across the Dongfeng KL’s large windshield (up to 1800mm width) and break down dirt, bug residue, or road salt. The pump features a dual-inlet design that prevents air intake (avoiding pressure loss) and supports continuous operation for up to 5 minutes (critical for heavy-duty cleaning). The included fan-spray nozzles are precision-machined to create a wide, even spray pattern (120mm coverage per nozzle) that overlaps without streaking, ensuring no blind spots on the windshield. Unlike low-pressure pumps that dribble fluid or single-stream nozzles that miss areas, this design guarantees fast, thorough cleaning—even in high-speed driving (up to 90 km/h)

Built to withstand the extreme conditions of truck under-hood spaces (temperature fluctuations, vibration, and chemical exposure), the assembly uses rugged materials. The washer reservoir is made of high-density polyethylene (HDPE) that resists cracking from freezing fluid (down to -40°C) and chemical degradation from washer fluid additives (e.g., antifreeze, detergents). The pump housing is made of impact-resistant nylon (PA66) that endures vibrations up to 2000 Hz without damage, while the internal diaphragm is made of EPDM rubber that maintains flexibility through 50,000+ pump cycles. The hoses are made of reinforced EPDM (with a polyester braid layer) that resists kinking and pressure loss, avoiding fluid blockages. Unlike plastic reservoirs that crack in cold weather or rubber hoses that harden, this material combination ensures 3+ years of reliable use

To prevent washer fluid leaks (which can damage under-hood components or freeze in winter), the assembly integrates multiple leak-proof features. The reservoir’s lid has a rubber gasket that creates an airtight seal, preventing fluid evaporation and contamination from dust. The pump’s inlet/outlet ports use barbed fittings that lock into the hoses, with a secondary O-ring seal that eliminates leakage even under pressure. The reservoir also includes an overflow tube that directs excess fluid (e.g., when overfilling) to the ground, avoiding spills onto electrical components (e.g., alternator, fuses). Unlike reservoirs with loose lids or friction-fit hoses that leak, this design ensures zero fluid loss—saving maintenance time and preventing under-hood corrosion from spilled washer fluid

Designed for efficient replacement by fleet technicians or DIY owners, the assembly simplifies installation with user-friendly features. It includes all necessary hardware: reservoir mounting bolts (4 M6×16mm), pump electrical connector (plug-and-play with OEM harness), and pre-cut hoses with pre-attached fittings—no cutting, crimping, or adapter parts needed. Installation takes 25–30 minutes with basic hand tools (e.g., socket wrench, screwdriver), as the assembly follows the original’s mounting layout. For maintenance, the reservoir has a wide filler neck (45mm diameter) that allows easy refilling, and the nozzles are removable for cleaning (to clear clogs from hard water deposits). Each unit undergoes strict testing: pressure leak testing (1.5 bar for 10 minutes), freeze resistance testing (-40°C for 24 hours), and pump durability trials. Backed by a 18-month warranty against manufacturing defects (e.g., cracked reservoir, pump failure, leaking hoses), it provides Dongfeng KL truck owners with reliable windshield cleaning and long-term performance