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Original High Performance Flywheel 4940931 for Cummins ISDE Engine

Type: Flywheel
Application: Diesel Engine Parts
OE NO.: 4940931
Condition: New
  • 4940931

  • DCEC

  • ISDE

  • Bus Truck Construction Machinery

  • Diesel

  • DCEC


Flywheel is a disc-shaped part with large moment of inertia, which acts as an energy memory. For a four-stroke engine, work is done once by every four piston strokes, and it’s consumed by three strokes: exhaust, intake, and compression. Therefore, the torque output from crankshaft varies periodically, and crankshaft speed is also unstable. To improve this situation, a flywheel is installed at the rear end of crankshaft.

The main function of flywheel is to store energy and inertia outside the work stroke of engine. A four stroke engine has only one work stroke, and the energy for intake, exhaust and compression comes from that stored in flywheel. Due to discontinuous work of each cylinder in the engine, the engine speed also varies. When the speed increases, the kinetic energy of flywheel increases, it stores energy. When the speed decreases, the kinetic energy of it also decreases, energy is released. It can be used to reduce speed fluctuations during engine operation.

Quality Excellent Quality
Package Carton Package
Delivery time 3-7 Working Days
Warranty 6 Months
Service Professional Service


10 PCS
Place of Origin Hubei,China
Marketing Type Hot Product 2023

Hubei Dongsheng Herui Import and Export Trading Co., Ltd.

We supply products mainly from DCEC CCEC XCEC FOTON factories located across China. The genuine engines we carry include ISF2.8-3.8,B3.3,4B3.9, QSB4.5-6.7, 6B5.9, ISBe, 6CT8.3, 6L8.9, ISLe, M11, ISM11, QSM11, NT855, KT19,QSX15 and KT38 models. Our product catalog covers all series of the best selling parts such as A2300, B3.3, 4B3.9, 6B5.9, 6C8.3, 6L8.9, ISBe, ISCe, ISDe, ISLe, M11,QSB, QSM, ISM, NT855, KT19, KT38, and more.





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