Piston guide ring for Demag AC80-1

The piston guide ring, identified by part number 256 153 40, functions within the hydraulic cylinders of the Demag AC80-1 crane. Its primary role is to guide the piston as it travels inside the cylinder bore, preventing direct metal-to-metal contact between the piston and the cylinder wall. By maintaining the concentricity of the piston, this component supports the effectiveness of the sealing system and helps prevent internal bypass or external fluid leaks.

This component is compatible with the Demag AC80-1 model. It is manufactured by Demag to meet the specific dimensional requirements of the machine's hydraulic cylinder assemblies. Proper installation of this guide ring ensures that the piston moves smoothly throughout its stroke, which is necessary for the consistent operation of crane functions such as boom extension, luffing, and outrigger deployment.

In hydraulic systems, guide rings are used to manage lateral loads placed on the piston rod. By providing a stable bearing surface, the ring minimizes friction and prevents the scoring of cylinder surfaces that can occur when a piston becomes misaligned under load. This allows the hydraulic system to maintain pressure and operational precision during heavy lifting tasks.