Flywheel 3974140

positive OEM
Cummins
Part# 3974140
note
OLD# 3285082
Mechanical flywheel storing rotational energy for engine speed stabilization.
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Description

The Cummins Genuine Flywheel (3974140) is a mechanical component that stores rotational energy to stabilize engine speed and smooth power delivery. It functions as a critical interface between the engine and transmission, contributing to consistent engine operation and vibration reduction in commercial truck applications.

Key Specifications

  • Application: 4B3.9, 6B5.9, 6C8.3, B4.5, QSB3.9, QSB4.5, QSB5.9, QSB6.7, QSB7 engines
  • Function: Stores rotational energy, smooths engine speed
  • Compatibility: Cummins heavy-duty diesel engines series
  • Construction: Cast steel
  • Features: Precision balanced, vibration dampening, starter gear ring
  • 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# 3974140
Old Part No.: 3285082
Type OEM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty