Dongfeng LoongGine Engine parts Water pump assembly 1307010-E9300

Engineered for maximum cooling performance, this water pump assembly features a precision-machined impeller (made of high-strength cast iron or aluminum alloy) with an optimized blade design that enhances fluid flow rate and pressure. Rigorous testing shows it delivers a maximum flow rate of 80-100 L/min at rated speed (2800 rpm), ensuring efficient circulation of coolant through the engine’s water jacket, radiator, and heater core. The impeller’s balanced design minimizes hydraulic noise and vibration, while its smooth surface reduces coolant turbulence—maintaining consistent coolant temperature (82-95°C) even under heavy-load conditions (e.g., uphill driving, high ambient temperatures). This efficient cooling prevents engine overheating, protects cylinder heads and gaskets from thermal damage, and extends the engine’s service life by 25%+ compared to low-efficiency aftermarket pumps

The 1307010-E9300 water pump assembly is built to withstand the harsh operating conditions of heavy-duty engines. Key components—including the pump housing, impeller, and shaft—are crafted from high-grade cast iron (HT250) or aluminum alloy (ADC12), selected for their excellent thermal conductivity, mechanical strength, and corrosion resistance. The pump shaft is heat-treated (quenched and tempered) to achieve a surface hardness of HRC 50-55, ensuring resistance to wear from the timing belt/chain and bearing. The assembly’s sealed ball bearing (rated for 50,000+ hours of operation) is pre-lubricated with high-temperature grease (-30°C to 150°C), eliminating the need for periodic re-lubrication and ensuring smooth shaft rotation even in extreme temperature ranges

To prevent coolant leakage—a critical issue for engine cooling systems—this water pump assembly integrates a dual-seal system: a primary mechanical seal and a secondary lip seal. The mechanical seal consists of a carbon-graphite stationary face and a silicon carbide rotating face, which create a tight, wear-resistant seal that withstands coolant temperatures up to 120°C and pressures up to 0.8 MPa. The secondary lip seal (made of nitrile rubber/NBR) acts as a backup, preventing any residual coolant from leaking past the mechanical seal and protecting the pump bearing from coolant contamination. Both seals are designed to resist degradation from ethylene glycol-based coolants and anti-corrosion additives, ensuring leak-proof performance throughout the pump’s service life (typically 80,000-100,000 kilometers under normal use)

Designed for user convenience, the 1307010-E9300 water pump assembly supports straightforward installation that aligns with Dongfeng LoongGine’s original engine layout. It comes pre-assembled with all critical components (impeller, shaft, bearings, seals, and pulley), eliminating the need for tedious individual part assembly. The pump’s flange features clear alignment marks, ensuring quick, accurate positioning on the engine block—reducing installation time by 30% compared to disassembled pump kits. For maintenance, the assembly’s pulley is attached via a keyway connection that allows easy removal (using standard tools) if belt replacement is needed. The pump requires no regular maintenance beyond routine coolant checks (to ensure proper fluid level and quality), and its durable construction minimizes the need for premature replacement. The part is laser-marked with the part number, material grade, and manufacturing date for easy identification and traceability, simplifying inventory management for fleet workshops