Mobile Hydraulic Systems

Introduction to Mobile Hydraulic Systems State the purpose of the mobile hydraulic system found on a typical line truck. Describe the basic principles of operation of a mobile hydraulic system. Hydraulic Pumps State three basic functions of hydraulic pumps. Describe the basic operation of a typical reciprocating pump. Describe the basic operation of a vane-type rotary pump. Hydraulic Actuators Identify the two basic types of hydraulic actuators. Describe the basic operation of a single-acting linear actuator. Describe the basic operation of a double-acting linear actuator. Describe the basic operation of a vane-type rotary actuator. Hydraulic Valves State the basic function of hydraulic valves in mobile hydraulic systems. Describe the basic operation of a flow control valve a directional flow control valve a check valve and a relief valve. Line Truck Hydraulic Systems Identify the parts of the mobile hydraulic system on a typical line truck. Describe the operation of holding valves and dump valves in a line truck hydraulic system. Explain why line trucks have two sets of controls that can be used to operate the bucket. Maintenance of Hydraulic Systems Describe a general procedure for conducting a pre-used inspection of a mobile hydraulic system. Describe general procedures for changing hydraulic fluid replacing a fluid filter fixing a leaky fitting and replacing a hydraulic hose on a line truck.