C3978478 XCMG GR2605 motor grader crankshaft flange

Technical Parameters

• Part Number: C3978478 (3978478)
• Brand: DCEC Cummins (adapted to the original specification of XCMG Grader GR2605)
• Type: Crankshaft Flange (Crankshaft End Flange, Crankshaft Connecting Flange)
• Material: High-quality 40Cr alloy structural steel, forged and formed, quenched and tempered heat treatment (hardness HRC32-38), surface nitriding treatment, with excellent tensile strength, toughness, wear resistance and corrosion resistance, can withstand the torque and impact generated by the high-speed rotation of the crankshaft.
• Fit Model: XCMG Grader GR2605 (equipped with Cummins QSB6.7 engine, the rated power of the engine is 194kW/2200rpm, displacement 24L, which is a special power model for construction machinery)
• Structure: Integrated flange structure, the flange plate is circular, with a smooth surface, no burrs or deformation; a crankshaft connecting hole is set in the center, and multiple mounting holes are evenly distributed around it, with a hole position tolerance of ±0.02mm, and a positioning step, which can accurately position the connection position of the flywheel and the crankshaft, avoid transmission deviation, and adapt to the power transmission layout of XCMG GR2605 engine.
• Key Dimensions: The diameter of the flange plate is 160mm, the thickness is 18mm; the diameter of the central connecting hole is φ45mm, the number of surrounding mounting holes is 6, the diameter of the mounting hole is φ12mm, the hole spacing (circular distribution) is 50mm, and the height of the positioning step is 3mm, which is precisely adapted to the crankshaft and flywheel installation size of XCMG GR2605 engine.
• Surface Treatment: Overall nitriding treatment, the surface is dark gray, the anti-rust grade reaches 48 hours of salt spray test without rust, resistant to engine oil pollution, high temperature, dust and humid environment corrosion in the operating environment, and at the same time improves surface hardness and wear resistance, extending service life.
• Installation Method: Bolt fastening connection. Attach the flange to the end of the crankshaft of XCMG GR2605 engine through the central hole, fasten it to the crankshaft with high-strength bolts through the surrounding mounting holes, then fix the flywheel on the positioning step of the flange, and tighten the torque to 85-95N·m to ensure firm connection without looseness. Before installation, clean the interface impurities to ensure tight fit.
• Cross Reference: 3965801, 4938656, C3978479 (interchangeable, all adapted to XCMG Grader GR2605 and the equipped Cummins QSB6.7 engine, ensuring power transmission adaptability)
• Weight: Approximately 1.2kg per piece (slightly different according to actual size)
• Applicable Parts: At the front or rear end of the crankshaft of XCMG Grader GR2605 engine, used to connect the crankshaft with the flywheel and the input end of the gearbox, which is the core connecting part of engine power transmission, directly affecting power transmission efficiency and stability.

Application Scenarios

• Fit Model: XCMG Grader GR2605 (exclusive adaptation, the hole position and size are precisely matched with the engine crankshaft, flywheel and gearbox interface, perfectly fitting with the body power transmission layout, no installation interference, ensuring smooth power transmission)
• Construction Machinery Scenarios: Various operating scenarios of XCMG GR2605 grader, including mine site leveling, highway infrastructure leveling, farmland renovation, factory site finishing, etc., adapting to the characteristics of high-frequency vibration, continuous heavy load and frequent start-stop of the grader, meeting the power transmission needs.
• Conditions: Suitable for common harsh working conditions of XCMG GR2605, including high temperature and high humidity, high altitude and cold, dusty mines, continuous heavy load operations, etc. The component has high strength, deformation resistance and wear resistance, can withstand the torque and vibration impact generated by the high-speed rotation of the crankshaft, no looseness or fracture after long-term use.
• Location: In the engine compartment of XCMG GR2605 grader, at the end of the crankshaft (front or rear end), between the crankshaft, flywheel and gearbox, fixed according to the original factory assembly layout, closely fitting with the crankshaft and flywheel, without interfering with other moving parts, ensuring no loss of power transmission.
• Functions: Transmit the torque output by the crankshaft of XCMG GR2605 engine, stably transmit power to the flywheel and gearbox, ensuring the power supply for grader operation; accurately position the axial position of the crankshaft, prevent crankshaft movement, and ensure the coordinated operation of various transmission components of the engine; buffer the vibration impact during transmission, reduce transmission noise, and protect core components such as crankshaft, flywheel and gearbox; enhance the stability and reliability of power transmission, avoid power interruption, component wear and other faults caused by loose flange, extend the service life of the power transmission system of XCMG GR2605 engine, and reduce the risk of operation shutdown.