Closing plug for Demag AC80-1

The closing plug, part number 313 396 99, is a component used in the Demag AC80-1 all-terrain crane. Its primary function is to seal unused ports or openings within hydraulic, pneumatic, or fluid systems. By closing these points, the plug prevents fluid leakage and protects the internal circuits from the ingress of contaminants such as dust, dirt, or moisture. Maintaining a secure seal is necessary to preserve the operational pressure and cleanliness required for the crane's systems to function correctly.

This component is compatible with the Demag AC80-1 model. It is designed to fit specific ports that may serve as test points or connection locations for optional accessories. Ensuring that all ports are properly sealed is a standard maintenance practice to avoid system contamination and potential loss of hydraulic performance.

Closing plugs are used throughout heavy machinery to block off ports that are not currently in use. They ensure that the fluid or air paths remain contained and protected from external environmental factors. Proper installation of these plugs helps maintain the overall efficiency of the machine's various hydraulic and pneumatic circuits.