Hydraulic Instalation on molding presses paving blocks with a capacity of 3 tons is used to simplify the installation process production pressing of paving blocks. The hydraulic system uses compressed fluid medium resulting compression force used to compress the dough into a paving block. Preparation of final project design hydraulic installations Based surfey field and literature studies, then the result is used as the basis surfey in the hydraulic installation molding machine paving block. Specifications hydraulic cylinder with crosssectional diameter of 63 [mm], the diameter of the piston rod 40 [mm] and the step length of 700 [mm] using a working pressure of 4.3 [MPa] are driven electric motor with a capacity of 3 [hp] can generate a compressive force of 3 [tonnes].