Flywheel 3973495

positive OEM
Cummins
Part# 3973495
note
OLD# 3906807
Heavy-duty flywheel storing rotational energy for engine stability and power delivery.
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Description

The Cummins Heavy-Duty Flywheel (3973495) is a mechanical component that stores rotational energy to stabilize engine operation and smooth power transmission to the drivetrain. It balances rotational forces and reduces vibration, supporting consistent engine momentum during operation in commercial vehicle powertrains.

Key Specifications

  • Application: Euro 2 5.9L B engines, 4B3.9, 6B5.9, B4.5, B5.9 G, G5.9, ISB CM2150, ISB CM550, QSB3.9 30 CM550, QSB5.9 30 CM550, QSB5.9 44 CM550, QSB6.7 CM850 (CM2850)
  • Function: Stores rotational energy, balances engine forces
  • Compatibility: Cummins B Series, ISB, QSB engine series
  • Construction: High-strength steel disc, precision balanced
  • Features: Robust mounting system, vibration reduction, kinetic energy storage
  • Quality: OEM Cummins part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

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More Information

Current Part# 3973495
Old Part No.: 3906807
Type OEM
Part# variations 3973495 CUM,
3973495CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty