C4991131 XCMG GR2605 motor grader torsional vibration damper

Technical Parameters

• Part Number: C4991131 (4991131)
• Brand: DCEC Cummins (adapted to the original specification of XCMG Grader GR2605)
• Type: Torsional Vibration Damper (Crankshaft Torsional Vibration Damper, Vibration Buffer)
• Material: The outer ring is high-quality alloy steel plate, the inner ring is nitrile rubber damping layer, and the core components are made of high-strength steel, which has good vibration damping, temperature resistance, oil resistance and anti-aging performance, and can withstand the vibration and impact generated by the high-speed rotation of the crankshaft.
• Fit Model: XCMG Grader GR2605 (equipped with Cummins QSB6.7 engine, rated power 194kW/2200rpm, displacement 24L)
• Structure: Integrated composite structure, composed of outer ring, damping layer and inner ring, with smooth surface without burrs or deformation. The inner ring is provided with a crankshaft connecting hole and a positioning keyway, which can be accurately matched with the crankshaft to avoid installation deviation and transmission looseness.
• Key Dimensions: Outer diameter 180mm, thickness 35mm; inner ring connecting hole diameter φ45mm, keyway size 12mm×8mm, the overall size is precisely adapted to the front end installation position of the crankshaft of XCMG GR2605 engine.
• Surface Treatment: The outer ring is treated with electrophoretic anti-rust, with a smooth surface, the anti-rust grade reaches 48 hours of salt spray test without rust, resistant to engine oil pollution, high temperature and dust corrosion in the operating environment, and extends the service life.
• Installation Method: Key connection + bolt fastening. Attach the inner ring to the front end of the crankshaft of XCMG GR2605 engine through the keyway, fasten it with high-strength bolts, and control the torque at 75-85N·m to ensure firm connection. Clean the interface impurities before installation.
• Cross Reference: 3925560, 3925561, C4991132 (interchangeable, all adapted to XCMG GR2605 and Cummins QSB6.7 engine)
• Weight: Approximately 1.8kg per piece (slightly different according to actual size)
• Applicable Parts: At the front end of the crankshaft of XCMG Grader GR2605 engine, directly installed at the end of the crankshaft, it is the core component for torsional vibration protection of the engine.

Application Scenarios

• Fit Model: XCMG Grader GR2605 (exclusive adaptation, the size and keyway are precisely matched with the front end interface of the crankshaft, fit with the body layout, no installation interference)
• Construction Machinery Scenarios: Suitable for various operating scenarios such as mine leveling, highway leveling, farmland renovation, factory finishing, etc., adapting to the characteristics of high-frequency vibration, continuous heavy load and frequent start-stop of the grader.
• Conditions: Tolerate harsh working conditions such as high temperature and high humidity, high altitude and cold, dusty mines, can work stably in the environment of -40℃~120℃, the vibration damping performance does not attenuate, no looseness or cracking.
• Location: In the engine compartment of XCMG GR2605 grader, at the front end of the crankshaft, close to the engine cylinder block, fixed according to the original factory layout, without interfering with other transmission components, ensuring the vibration damping effect.
• Functions: Absorb crankshaft torsional vibration, suppress resonance, attenuate vibration energy, and reduce transmission noise; protect core components such as crankshaft, flywheel and gearbox, avoid wear and fracture caused by vibration impact; ensure stable power transmission, improve engine operation stability, and reduce the risk of operation shutdown failure.