Flywheel 3973501

positive OEM
Cummins
Part# 3973501
note
OLD# 3917039
Flywheel storing rotational energy to stabilize engine and transmission operation.
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Extended Lead Time
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Description

The Cummins Clutch Flywheel (3973501) is a mechanical component that stores rotational energy to stabilize engine operation and smooth power transfer to the transmission. It reduces vibrations and supports consistent engine speed during gear changes and idling, contributing to efficient drivetrain performance in commercial vehicles.

Key Specifications

  • Application: Euro 2 5.9L B engines, 4B3.9, 6B5.9, B4.5, B5.9 G, QSB3.9 30 CM550, QSB5.9 30 CM550
  • Function: Stores rotational energy, smooths power delivery
  • Compatibility: Cummins B series, QSB series engines
  • Construction: High-strength steel disc, machined ring gear
  • Features: Balanced design, vibration dampening, starter motor engagement ring gear
  • 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). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# 3973501
Old Part No.: 3917039
Type OEM
Part# variations 3973501 CUM,
3973501CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty