Hydraulic System151Service Manual – Advance 7765 / Nilfisk CR1500Note: The cylinder Pressures and Flow rates on the preceding pages are with the hopper stabilizedand at rest. Peak relief pressure is 2500 psi.The pressure while raising the hopper will depend on the weight of the hopper. If the hopperdump door cylinder or hopper lift cylinder is fully-extended or retracted (dump door only)and the lever is not returned to the neutral position, the pressure will go to the relief settingof 2500 psi.Main Control Valve SpecificationsComponent Component Description Hydraulic Circuit FunctionRV1 Poppet-type relief valve 2500 psi [172.4 bar] Relief Valveto T1FR1 Plug –SV1 Solenoid-operated, two-way, piloted, poppet-typehydraulic cartridge valve; normally open, screw-in. Main Broom Solenoid (2)SV2 Solenoid-operated, two-way, piloted, poppet-typehydraulic cartridge valve; normally open, screw-in. Normal Brush Rotation (4)SV3 A solenoid-operated, four-way, two-position, direct-acting, spool-type, screw-in hydraulic cartridge valve. Reverse Rotation Brush (3)Coil 12 VDC, dual spade connectors; nominal coilresistance – 7.2 Ω. Used on SV1, SV2 and SV3FR1RV1 SV1SV3SV2Main ControlValve
