Cylinder liner for Komatsu GD511A

The cylinder liner 6207-21-2121 acts as the primary contact surface for the piston assembly within the internal combustion engine. By housing the piston movement, it protects the engine block from direct friction and the thermal stresses associated with the combustion process. This component functions as a replaceable barrier that maintains the necessary tolerances for compression and lubrication, ensuring the integrity of the engine block during operation.

This part is designed for the Komatsu S6D95L-1 engine, which is utilized in the Komatsu GD511A and GD511A-1 motor graders. The liner provides a specific internal diameter to facilitate proper piston travel and heat transfer within the cylinder assembly.

Cylinder liners are installed in engine blocks to provide a renewable surface for piston rings. They are engineered to manage the heat generated by combustion and to maintain a seal that prevents gas leakage and oil consumption. By replacing the liner during engine overhauls, technicians can restore the cylinder bore to original specifications without replacing the entire engine block.