Cummins
Piston for Cummins NT855
This piston is designed for the Cummins NT855 engine. It serves as a core component within the combustion chamber to facilitate engine power output.
Compatible models
Specifications
- Part number
- 40589600
- Brand
- Cummins
The piston with part number 40589600 is a component for the Cummins NT855 diesel engine. It functions within the cylinder to transform the energy generated by combustion into linear motion, which is subsequently transferred to the crankshaft to produce rotational force. This unit is manufactured by Cummins.
This part is compatible with the Cummins NT855 engine model. It is designed to fit within the cylinder bore to maintain compression and manage the transfer of heat from the combustion chamber to the cylinder walls.
In an internal combustion engine, the piston acts as a movable plug that seals the combustion chamber. It must withstand the pressure cycles of the engine while supporting the piston rings, which regulate oil consumption and provide a seal against the cylinder liner. Maintaining the correct dimensions of the piston is necessary for proper engine clearance and efficient operation.

