Dongfeng LoongGine engine parts water pump assembly 1307BF11-010

Built as the core of the engine’s heat management system, this water pump adopts an optimized centrifugal structure to deliver superior cooling performance. The impeller (high-strength cast aluminum alloy) features 14 curved vanes with a 50° twist angle, generating a coolant flow rate of 165L/min at the engine’s rated speed (2200rpm)—35% higher than traditional straight-vane impellers. This ensures rapid heat transfer from the cylinder block and head, maintaining the DD11 engine’s operating temperature within 85-92℃ even under full-load conditions (e.g., climbing with a 40-ton payload). The impeller’s streamlined design reduces flow resistance by 25%, minimizing the engine’s power consumption for cooling (≤2% of total output)

Engineered to endure the harsh operating conditions of heavy-duty engines, the pump assembly features a rugged build. The pump body is precision-cast from A383 aluminum alloy with reinforced ribs, resisting deformation under 160kPa coolant pressure (common during high-temperature operation). The drive shaft is made of 42CrMo alloy steel, undergoing quenching and tempering treatment to achieve a tensile strength of 900MPa and HRC 52-55 hardness, ensuring resistance to bending and wear. A double-row deep-groove ball bearing (sealed type) provides smooth rotation, with a service life of ≥300,000km. The mechanical seal (silicon carbide stationary ring + carbon rotating ring) prevents coolant leakage, with a tested leakage rate of ≤0.008g/h

Designed to adapt to diverse operating climates and coolant types, the pump assembly exhibits exceptional environmental resistance. The impeller and internal flow channel are coated with a zirconium oxide ceramic layer (0.1mm thickness), resisting corrosion from ethylene glycol coolant, hard water, and chemical impurities—passing 1000-hour coolant immersion testing (120℃) with no pitting. The mechanical seal’s O-ring is made of HNBR rubber, operating stably at temperatures ranging from -45℃ to 135℃, avoiding brittleness in frigid regions or swelling in high-temperature environments. The external pulley and housing undergo electrophoretic coating (70μm thickness), passing 1500-hour neutral salt spray testing (ASTM B117) to prevent rust in coastal or saline-alkali areas

The water pump assembly is designed for efficient maintenance and long-term cost savings. Its modular structure allows individual replacement of wear parts (e.g., bearing, mechanical seal) without replacing the entire assembly, reducing repair costs by 50%. The 4-point bolt mounting and pre-aligned pulley ensure quick installation—two technicians can complete replacement in 90 minutes, 40% faster than non-OE alternatives. By maintaining stable engine temperature, it reduces thermal fatigue on components like cylinder heads and pistons, extending engine service life by 30% and avoiding expensive overhauls. Backed by a 2-year/250,000km warranty, it provides reliable performance for heavy-duty applications, minimizing unplanned downtime and operational costs