Komatsu
Piston for Komatsu 6D155
This piston is designed for use in the Komatsu 6D155 engine. It serves as the primary component for converting combustion energy into mechanical power within the engine cylinders.
Compatible models
Specifications
- Part number
- 6128-31-2140
- Brand
- Komatsu
The piston 6128-31-2140 is a component for the Komatsu 6D155 engine. It functions as a cylindrical element that moves reciprocally within the cylinder bore, transferring the force generated by the combustion of the air-fuel mixture to the crankshaft via the connecting rod. This movement is the primary mechanism for power generation within the engine assembly.
This component is compatible with the Komatsu 6D155 engine series. It features machined grooves designed to accommodate piston rings, which facilitate the sealing of the combustion chamber, heat transfer to the cylinder liner, and the regulation of oil consumption. The dimensions and surface finish are engineered to meet the specific operational requirements of this engine model.
In internal combustion engines, pistons act as the moving boundary of the combustion chamber. They must maintain a seal against high-pressure gases while transmitting the force of the power stroke. Proper fitment and condition of the piston are required to maintain engine compression, which directly influences power output and fuel efficiency during operation.

