A coolant circuit for a self-propelled work machine includes multiple electric drive components, including a coolant pump for generating a flow of coolant which circulates in the coolant circuit, a heat exchanger for dissipating thermal energy stored in the coolant, and at least two circuit lines which extend parallel to each other and are embodied to guide the coolant past the drive components respectively assigned to them, in order to absorb thermal energy. A self-propelled work machine, in particular a mobile crane, includes multiple electric drive components and one or more such coolant circuits.