Flywheel 3931399

positive OEM
Cummins
Part# 3931399
note
Rotating mass component for engine momentum and fuel pump drive
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Extended Lead Time
non-returnable Non-returnable info
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Description

The Cummins Flywheel (3931399) is a critical rotating component that stores rotational energy to maintain engine momentum and smooth operation. It interfaces mechanically with the fuel injection pump and transmission, ensuring consistent power delivery and timing synchronization within diesel engine systems.

Key Specifications

  • Application: Tier 3 8.3L diesel engines, heavy-duty trucks, industrial machinery
  • Function: Stores rotational energy, drives fuel injection pump, stabilizes crankshaft speed
  • Compatibility: ISC, ISL, QSC, QSL, QSB series engines
  • Construction: Cast steel
  • Features: Bolt hole circle 4 1/4" & 108mm, direct mechanical linkage interface
  • 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# 3931399
Type OEM
Part# variations 3931399 CUM,
3931399CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty