Flywheel 3974431

positive OEM
Cummins
Part# 3974431
note
OLD# 3673363
Mechanical flywheel storing rotational energy for engine stability and clutch operation.
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Extended Lead Time
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Description

The Cummins Flywheel (3974431) is a mechanical component that stores rotational energy to stabilize engine operation. It connects to the crankshaft to maintain momentum between power strokes, reducing vibrations and facilitating smooth power delivery. This flywheel also interfaces with the clutch system to support gear engagement and engine balance.

Key Specifications

  • Application: Small bore, medium bore, large bore Cummins engines
  • Function: Stores rotational energy, stabilizes engine torque
  • Compatibility: 4B3.9, B4.5, QSB3.9, 6B5.9, QSB4.5, QSB5.9, QSB6.7, QSB7
  • Construction: Alloy steel, machined surface
  • Features: Precision balanced, starter ring gear, clutch interface surface
  • 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# 3974431
Old Part No.: 3673363
Type OEM
Part# variations 3974431 CUM,
3974431CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty