C3915490 XCMG GR2605 motor grader clamping plate

Technical Parameters

• Part No.：C3915490 (3915490)
• Brand：DCEC Cummins / Genuine Cummins
• Name：Fan Pulley Clamping Plate / Crankshaft Pulley Pressure Plate
• Material：45# high-quality carbon steel / forged steel (quenched & tempered)
• Surface：Black oxide / phosphated anti-corrosion
• Center Bore：φ42mm (crankshaft journal fit)
• Outer Diameter：φ115mm
• Thickness：10mm
• Mounting Holes：4×φ11mm (PCD φ85mm)
• Bolt Size：M10×35 (4 pcs)
• Torque：45–55N·m
• Weight：Approx. 0.27kg
• Fit Engine：Cummins 4B3.9, 6BT5.9, ISBE, QSB5.9, 6B5.9
• Cross Reference：3904690, 3917639

Application

• Fit Engines：Cummins 4B3.9, 6BT5.9, ISBE, QSB5.9, 6B5.9
• Fit Equipment：Dongfeng Tianlong/Tianjin, Foton Auman; XCMG/LiuGong/XGMA loaders, Sany/Komatsu/Hyundai excavators, rollers, forklifts, generators, mining machinery
• Mounting：Crankshaft front, pressed against inner fan pulley, bolted to crankshaft
  • Axially clamps fan pulley to prevent movement & loosening
  • Ensures pulley-crankshaft alignment, avoids belt wear & noise
  • Transmits torque to drive fan, water pump & alternator
  • Resists vibration & shock for heavy-duty operation

Common Faults & Troubleshooting

1. Fan Noise, Belt Vibration & Abnormal Wear

• Cause：Loose clamping plate, deformation, broken bolts; worn pulley-crankshaft interface
• Fix：Retorque bolts (45–55N·m); replace bent/cracked plate; clean mating surfaces

2. Pulley Misalignment & Excessive Fan Runout

• Cause：Poor-quality plate, incorrect thickness, improper installation
• Fix：Install genuine C3915490; realign pulley; ensure full contact between plate & pulley

3. Broken Bolts & Plate Cracking

• Cause：Over-torquing, inferior material, fatigue from vibration
• Fix：Use OEM 45# steel plate; torque to spec; inspect bolts periodically

4. Front Crank Seal Leak & Noise

• Cause：Plate distortion causes pulley wobble, damaging oil seal
• Fix：Replace plate & seal; align pulley; reinstall & torque correctly