Crimping tool for crimping a part onto a support comprising: - a rod mounted movably and configured to collaborate in removable manner with the part, - a first chamber containing a first fluid, - a second chamber containing a second fluid, - a piston mounted movably and having a body in contact with the first fluid and a head coupled to the body, the head being mounted movably inside the second chamber and separating the second chamber into first and second compartments (30, 31), - an inlet terminal designed to be connected to a source of the second fluid, - an outlet terminal designed to allow outlet of the second fluid and connected to the main valve, the main valve comprising a member mounted movably between a rest position in which the second compartment is coupled to the inlet terminal and the first compartment is coupled to the outlet terminal, and an active position in which the first compartment is coupled to the inlet terminal and the second compartment is coupled to the outlet terminal, and - a main valve connected to the first compartment and to the inlet terminal, the main valve being configured to direct the second fluid into the first compartment to move the piston so as to increase a pressure of the first fluid to bring about a movement of the rod in a crimping direction and crimp the part to the support, the main valve being connected to the second compartment and configured to direct the second fluid into the second compartment to move the piston so as to reduce the pressure of the first fluid to bring about a movement of the rod in an opposite direction to the crimping direction, - a trigger valve connected to the inlet terminal and to the member of the main valve by a feed pipe, the trigger valve being configured to connect the feed pipe with the inlet terminal to move the member of the main valve to its active position, - the main valve comprising an elastic component connected to the member of the main valve and configured to move the member of the main valve to its rest position when a pressure of the second fluid exerted on the member of the main valve is lower than a pressure exerted by the elastic component on the member of the main valve crimping tool characterised in that it comprises a detection valve connected to the feed pipe, to the first fluid, and to the member of the main valve by an auxiliary duct, and wherein the detection valve is configured to connect the auxiliary duct with the feed pipe when a pressure of the first fluid is higher than a threshold to move the member of the main valve to its rest position. - a rod mounted movably and configured to collaborate in removable manner with the part, - a first chamber containing a first fluid, - a second chamber containing a second fluid, - a piston mounted movably and having a body in contact with the first fluid and a head coupled to the body, the head being mounted movably inside the second chamber and separating the second chamber into first and second compartments (30, 31), - an inlet terminal designed to be connected to a source of the second fluid, - an outlet terminal designed to allow outlet of the second fluid and connected to the main valve, the main valve comprising a member mounted movably between a rest position in which the second compartment is coupled to the inlet terminal and the first compartment is coupled to the outlet terminal, and an active position in which the first compartment is coupled to the inlet terminal and the second compartment is coupled to the outlet terminal, and - a main valve connected to the first compartment and to the inlet terminal, the main valve being configured to direct the second fluid into the first compartment to move the piston so as to increase a pressure of the first fluid to bring about a movement of the rod in a crimping direction and crimp the part to the support, the main valve being connected to the second compartment and configured to direct the second fluid into the second compartment to move the piston so as to reduce the pressure of the first fluid to bring about a movement of the rod in an opposite direction to the crimping direction, - a trigger valve connected to the inlet terminal and to the member of the main valve by a feed pipe, the trigger valve being configured to connect the feed pipe with the inlet terminal to move the member of the main valve to its active position, - the main valve comprising an elastic component connected to the member of the main valve and configured to move the member of the main valve to its rest position when a pressure of the second fluid exerted on the member of the main valve is lower than a pressure exerted by the elastic component on the member of the main valve