If fan blade assembly is replaced because of mechanical damage, water pump and viscous fan drive should also be inspecteThese components could have been damaged due to excessive vibration.
如果因为机械损坏而更换风扇叶片组合，应该检查水泵及粘性风扇驱动，这些组件可能由于过度抖动而损坏。
Viscous fan drive not operating properly.
粘性风扇驱动不能正常工作。
Thermal viscous fan drive has defective bearing.
热粘性风扇驱动有失灵的轴承。
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