Hydraulic circuit

A hydraulic circuit comprising

• a high-pressure connection,
• a low-pressure connection,
• a supply unit, and
• a pump system,
• wherein the low-pressure connection is fluidically connected to the high-pressure connection by means of a series circuit of the supply unit and the pump system,
• wherein the pump system has a pump for conveying a fluid, a shaft for driving the pump, and at least one stop-check valve system,
• wherein the pump is configured to convey the fluid from a first pump connection to a second pump connection in a first state and to convey the fluid from the second pump connection to the first pump connection in a second state,
• wherein the check valve system is fluidically connected to the second pump connection at a first valve connection and to the high-pressure connection at a second valve connection,
• wherein the check valve system is configured to prevent a fluid flow from the second valve connection to the first valve connection and to allow a fluid flow from the first valve connection to the second valve connection,
• wherein the check valve system has a control connection via which a fluid flow from the second valve connection to the first valve connection is enabled,
• wherein the hydraulic circuit is configured to enable the fluid flow from the second valve connection to the first valve connection via the control connection when the pump is in the second state,
• wherein the supply unit is configured to allow a fluid flow from the low-pressure connection at the first pump connection and to prevent a fluid flow from the second pump connection to the low-pressure connection in a first state of the pump,
• wherein the supply unit is configured to allow a fluid flow from the low-pressure connection at the second pump connection and to prevent a fluid flow from the first pump connection to the low-pressure connection in a second state of the pump,
• wherein
• the pump has a leakage flow towards the shaft when the fluid is conveyed, and the shaft is connected to the low-pressure connection by a pressure equalization line in order to conduct the fluid away from the shaft, and/or
• the check valve system has a leakage flow between the control connection and the first valve connection when the pump is in the second state.