Dongfeng KL truck parts Washer assembly 3747010-C3100 in stocked

Equipped with a 12V/24V (depending on Dongfeng KL variant) diaphragm washer pump, the assembly delivers a maximum pressure of 1.3 bar and a flow rate of 1.8 L/min—powerful enough to spray washer fluid across the truck’s large windshield (up to 1900mm) and dissolve tough contaminants like bug residue, road salt, or dust. The pump features a sealed motor design that prevents water intrusion and supports continuous operation for up to 6 minutes (critical for heavy-duty cleaning during long hauls). Unlike low-pressure centrifugal pumps that struggle with thick winter washer fluid (antifreeze-blended), this diaphragm pump maintains consistent performance even in sub-zero temperatures (-40°C), ensuring reliable cleaning in all weather conditions

Built to withstand the harsh under-hood environment of commercial trucks—including extreme temperatures, vibration, and chemical exposure—the assembly uses rugged, high-performance materials. The washer reservoir is made of impact-resistant HDPE (High-Density Polyethylene) that resists cracking from freezing fluid and chemical degradation from washer fluid additives (e.g., detergents, antifreeze). The pump housing is constructed from glass-filled nylon (PA66-GF20) that endures vibrations up to 2500 Hz without damage, while the internal diaphragm is made of EPDM rubber that retains flexibility through 60,000+ pump cycles. The hoses are reinforced with a polyester braid layer that prevents kinking and pressure loss, avoiding clogs that disrupt fluid flow. Unlike plastic reservoirs that become brittle in cold weather, this material combination ensures the assembly operates reliably for 4+ years

To prevent washer fluid leaks (which can damage under-hood electrical components or freeze in winter), the assembly integrates a multi-layer sealing system. The reservoir lid features a rubber O-ring gasket that creates an airtight seal, preventing fluid evaporation and contamination from dust or debris. The pump’s inlet and outlet ports use barbed fittings with dual O-rings that lock into the hoses, eliminating leakage even under maximum pressure. Additionally, the reservoir includes a built-in overflow tube that directs excess fluid (from overfilling) to the ground, avoiding spills onto critical components like the alternator or fuse box. Unlike basic washers with loose lids or friction-fit hoses, this design ensures zero fluid loss—reducing maintenance costs and preventing under-hood corrosion

Designed for hassle-free replacement by fleet technicians or DIY owners, the assembly simplifies installation with user-friendly features. It includes all necessary hardware: 4 OEM-specification mounting bolts (M6×14mm), a plug-and-play electrical connector (compatible with the truck’s original wiring harness), and pre-cut hoses with pre-attached quick-connect fittings—no cutting, crimping, or additional adapters required. Installation takes 20–25 minutes with standard hand tools (e.g., Phillips screwdriver, socket wrench), as the assembly aligns perfectly with the truck’s factory mounting points. For maintenance, the reservoir has a wide filler neck (50mm diameter) for easy refilling, and the nozzles are removable for cleaning (to clear hard water deposits). Each unit undergoes rigorous testing: pressure leak testing (1.5 bar for 15 minutes), freeze resistance testing (-40°C for 48 hours), and pump durability trials. Backed by a 24-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 peace of mind