381100412 XCMG GR2605 motor grader engine water inlet connection bend

381100412 XCMG GR2605 motor grader engine water inlet connection bend

The XCMG GR2605 grader’s 381100412 engine water inlet connection bend is a key flow-guiding component of the engine cooling system. It is precisely matched with the 803077507 radiator assembly and engine block water inlet, manufactured strictly according to XCMG’s original design standards, dimensional tolerances, and process specifications. It is specifically designed for the Cummins QSB6.7 turbocharged intercooled engine, suitable for harsh operating environments with high vibration, high impurities, and fluctuating high and low temperatures, such as highway construction, airport construction, mining operations, and large-scale earthmoving. As a “dedicated flow channel” for coolant entering the engine, it is responsible for smoothly guiding the low-temperature coolant, cooled by the radiator, into the engine block water jacket, ensuring smooth coolant circulation. This directly affects the cooling system’s heat dissipation efficiency and engine temperature stability, preventing localized overheating due to poor flow. It is a high-quality original factory replacement part for aging, damaged, or leaking cooling system pipes on the GR2605 grader.

This inlet connection elbow is made of high-strength aluminum alloy precision die-casting, material grade ZL106, strengthened by T6 heat treatment, with a tensile strength ≥240MPa and a yield strength ≥180MPa. It possesses excellent vibration resistance, able to withstand continuous vibration and impact during equipment operation, and also has good thermal conductivity, helping to balance coolant temperature. The inner wall of the elbow is precision machined and polished, with a surface roughness Ra≤0.8μm, resulting in low fluid resistance and coolant flow rate loss ≤5%, ensuring circulation efficiency. Combined with the radiator and suction fan, it can quickly dissipate engine heat. The elbow uses an optimized streamlined bending angle (a custom bending angle designed according to the original vehicle piping layout), with no sharp bends or dead angles, avoiding coolant flow obstruction and eddy currents, while also reducing impurity deposition and lowering the risk of blockage.

The elbow joints feature a flange design, with precision-milled flange faces achieving a flatness error of ≤0.02mm, ensuring a tight fit with the radiator outlet and engine block inlet. The joints are equipped with original factory-issued fluororubber gaskets, resistant to temperatures from -40℃ to 150℃, resistant to coolant corrosion, and providing excellent sealing performance with a sealing gap of ≤0.03mm. This effectively prevents coolant leakage and ensures stable cooling system pressure (suitable for systems with a working pressure of 0.08-0.12MPa). The flange connection holes are CNC drilled with a tolerance controlled within ±0.02mm, and are fitted with original factory high-strength stainless steel bolts and anti-loosening washers, ensuring reliable fastening after installation and preventing loosening under long-term vibration.

The bend surface undergoes a double-layer anti-corrosion treatment of anodizing and electrophoresis, with a coating thickness of 25-30μm. This provides excellent corrosion resistance, allowing it to withstand immersion in mud and water, coolant corrosion, and outdoor UV aging. It is resistant to rust and delamination even after long-term use. The external design features a reinforced rib structure to enhance the rigidity of key components and prevent deformation and cracking due to vibration. All dimensions, bending angles, and installation interfaces are precisely matched to the original cooling system piping of the XCMG GR2605 vehicle, requiring no cutting, welding, or hole modification. Original factory sealing gaskets and mounting bolts are included; installation is simple – just align and tighten. Disassembly and assembly are convenient, allowing for single-person replacement and rapid restoration of the cooling system’s airflow sealing performance.

Core Technical Parameters

Part Model: 381100412
Part Name: Engine Water Inlet Connection Bend (Coolant Guide Connection)
Applicable Model: XCMG GR2605 Motor Grader
Compatible Components: Matches 803077507 Radiator Assembly and Engine Block Inlet
Compatible Engine: Cummins QSB6.7 Turbocharged Intercooled Engine
Material: ZL106 Aluminum Alloy (T6 Heat Treatment), Fluororubber Sealing Gasket, Stainless Steel Bolts
Process: Precision Die Casting, T6 Heat Treatment, Precision Machining and Polishing, Anodizing + Electrophoretic Corrosion Protection
Core Parameters: Tensile Strength ≥240MPa, Inner Wall Roughness Ra≤0.8μm, Temperature Resistance -40℃ to 150℃
Pressure Tolerance: ≤0.15MPa (far exceeding system operating pressure)
Features: Smooth flow, tight seal, vibration and corrosion resistant, wear-resistant and durable, precise installation
Functions: Coolant flow connection, ensures smooth circulation, prevents leakage, and assists in temperature equalization

Core Advantages

Original factory standard precise fit, seamless connection with cooling system components; high-strength aluminum alloy material, vibration and deformation resistant; low-resistance inner wall design, high cooling circulation efficiency; fluororubber seals + anti-loosening bolts, low risk of leakage; double-layer anti-corrosion treatment, suitable for harsh working conditions; easy installation, quickly restores cooling system performance, and reduces maintenance costs.

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