Closing plug for Demag AC80-1

The closing plug, part number 313 455 99, functions as a seal for various openings within the hydraulic and fluid circuits of the Demag AC80-1 crane. It is installed in housings, fluid reservoirs, pressure lines, and valve blocks to prevent the leakage of hydraulic oil, lubricants, or coolants. By sealing these access points, the component also acts as a barrier against external contaminants such as dust, dirt, and moisture, which helps maintain the cleanliness of the internal fluid systems.

This component is specifically engineered for the Demag AC80-1 mobile crane. It ensures that internal pressure levels remain stable and that fluids circulate through the hydraulic cylinders, motors, and valves without loss. Proper installation of this plug is necessary to maintain the operational pressure of the machine's hydraulic circuits.

In heavy machinery, closing plugs are used to seal off unused ports or access points in hydraulic manifolds and casings. They are typically secured with a gasket or O-ring to provide a tight seal against the operating pressures found in crane hydraulic systems. Maintaining these seals is a standard part of fluid system management to prevent pressure drops and contamination.