A cooling device for a hydraulic brake system, comprising:– a cooling element (1), which is hollow and a fixed end (11) and a connecting end (12), wherein the fixed end (11) and the connecting end (12) are opposite one another, wherein the fixed end (11) the connection to a hydraulic cylinder or a braking mechanism (7) and the connection with the same is used, wherein the connecting end (12) in an oil line (5) is inserted, so that the cooling element (1) and the oil line (5) joined together closely and are connected with one another, wherein the cooling element (1) has a cooling part (13) between the fixed end (11) and the connecting end (12) is disposed; and– a sleeve-shaped fastening element (2), which is disposed around the point at which the cooling element (1) and the oil line (5) are joined together, and up to the connecting end (12) of the cooling element (1) is mounted, wherein the sleeve-shaped fastening element (2) for a reinforcement of the connection of the cooling element (1) and of the oil line (5) and for a better seal,characterized in that the cooling device further comprises a plurality of cooling connection tubes (3), which is located around the oil line (5) according to the row are connected one behind the other, whereby one of the cooling connection tubes (3) on the sleeve-shaped fastening element (2) is supported.
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