Flywheel 3972705

positive OEM
Cummins
Part# 3972705
note
OLD# 3972705
Engine flywheel storing energy and enabling starter motor engagement.
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Description

The Cummins Genuine Flywheel (3972705) is a critical engine component that stores rotational energy to stabilize engine speed and smooth power delivery. It also provides the engagement surface for the starter motor to initiate engine cranking, ensuring consistent engine operation in heavy-duty applications.

Key Specifications

  • Application: 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2670 B164C, F3.8 CM2350 F128C, F4.5 CM2620 F141C, G5.9, G5.9 CM558, G8.3, G8.3 CM558, GTA8.3 CM558, ISB CM550, ISB/ISD4.5 CM2150 B119, ISB6.7 CM2250, ISB6.7 CM2350 B101, ISBE4 CM850, ISC CM554, ISL9 CM2150 SN, ISL9.5 CM2880 L138, L8.9 CM2670 L134C, QSB3.9 30 CM550
  • Function: Stores kinetic energy; stabilizes engine speed; starter motor engagement
  • Compatibility: Cummins engine series including B, ISB, ISL, QSB, ISC, ISBE, G, F, L series
  • Construction: Cast steel flywheel with integrated starter ring gear
  • Features: Heavy rotational mass; friction surface for clutch engagement; vibration dampening; starter ring gear integration
  • 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# 3972705
Old Part No.: 3972705
Type OEM
Part# variations 3972705 CUM,
3972705CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty