Flywheel Ring Gear 3976903

positive OEM
Cummins
Part# 3976903
note
Flywheel ring gear enabling starter motor engagement for engine cranking.
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Description

The Cummins Clutch Flywheel Ring Gear (3976903) is a toothed gear mounted on the flywheel’s outer edge, enabling engagement with the starter motor’s pinion gear to initiate engine cranking. It facilitates the transfer of rotational force necessary for engine start-up and contributes to maintaining rotational momentum within the engine system.

Key Specifications

  • Application: ISB Series, ISBE Series, ISC Series, ISL Series, B Series, C Series engines
  • Function: Engages starter motor pinion to crank engine
  • Compatibility: Cummins ISB, ISBE, ISC, ISL, B, C engine series
  • Construction: Heat-treated steel gear with precision-machined teeth
  • Features: 138 teeth, balanced design, OEM specification compliance
  • Quality: OEM Cummins part

Shipping Info

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More Information

Current Part# 3976903
Type OEM
Part# variations 3976903 CUM,
3976903CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty