Flywheel Housing 3991790

positive OEM
Cummins
Part# 3991790
note
OLD# 3925223
Structural housing securing flywheel and supporting clutch-transmission interface.
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Extended Lead Time
non-returnable Non-returnable info
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Description

The Cummins Flywheel Housing (3991790) is a structural enclosure that secures the flywheel and facilitates the mechanical connection between the engine and transmission. It provides a protective casing to maintain alignment and support clutch engagement within the powertrain system of commercial vehicles.

Key Specifications

  • Application: B Series, 4B, 6B, QSB, ISB engines
  • Function: Encloses flywheel; supports clutch and transmission interface
  • Compatibility: Cummins B4.5, B5.9 GAS PLUS CM556, 4B3.9, 6B5.9, QSB3.9 30 CM550, QSB5.9 30 CM550, ISB CM550
  • Construction: Aluminum housing with precision-machined mounting points
  • Features: Corrosion-resistant; robust mounting; precise fitment; supports starter motor 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# 3991790
Old Part No.: 3925223
Type OEM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty