Abstract: An electro-hydraulic system for operating a cooling fan and providing hydraulic fluid to a power steering system of the vehicle includes a hydraulic pump unit including first and second fixed displacement pumps and a common drive shaft for these pumps. A hydraulic fluid reservoir is connected to the inlet of each of the pumps. A priority valve is operatively connected to the outlet of the first pump and has an outlet connectible to the power steering system. This valve also has a second outlet connectible to a hydraulic motor for the cooling fan. This valve is arranged to provide a constant flow of hydraulic fluid to the power steering system. A hydraulic line connects an outlet of the second pump to the hydraulic motor. Hydraulic fluid flow through this line is combined with hydraulic fluid flow from the first pump to drive the motor.

Abstract: A system having a cooled power unit assembly, preferably an injection molding machine. The system comprises a primary machine; an electric motor for providing power to at least one mechanism of the primary machine, preferably the injection molding machine. The electric motor exhibits an operating temperature and an operating noise level. A cooling liquid is provided for cooling the electric motor and regulating the operating temperature. Also, a cabinet for containing the cooling liquid adjacent the electric motor is provided. The cabinet has a device for placing the cooling liquid in a configuration for insulating a surrounding environment from any of the operating noise level which measures above a prescribed level.