vService Manual – SW8000Engine Vacuum 109Special Tools 110Hopper System 111Functional Description 111Overview 111Hopper 111Hopper Door 112Hopper Hydraulic System 113Hopper System Wiring Diagram 114Hopper System Circuit Description 115Hopper System Hydraulic Diagrams 116Hopper Down, Hopper Door Closed 116Raise Hopper 117Lower Hopper 118Open Hopper Door 119Close Hopper Door 120Component Locations 121Hopper 121Hopper Interlock Switch 121Hopper Lift Cylinder 122Hopper Prop Rod 122Hopper Door Cylinder 123Hydraulic Manifold Assembly and Solenoid Valves 123Troubleshooting 124Specifications 126Hydraulic System 127Functional Description 127Overview 127Hydraulic Pumps 128Hydraulic Manifold Assembly 128Electrical Schematic 129Electrical Circuit Description 129Component Locations 130Hydraulic Piston and Gear Pumps 130Hydraulic Manifold Assembly 130Hydraulic Oil Reservoir 131Oil Filter 131Oil Cooler 132Maintenance and Adjustments 132To Check the Hydraulic Oil Level 132To Change the Hydraulic Oil Filter 133To Clean the Hydraulic Oil Cooler 133Troubleshooting 134General Troubleshooting 134General Information Regarding Checking Hydraulic Pressures 134Checking the Gear Pump Pressure 135Checking the Piston Pump Pressure 136Hydraulic Truth Table 136Specifications 137General Specifications 137
