GENERAL / Component Specifications HYDRAULIC COMPONENT MAIN PUMP Type.......................................................... Bent Axis Type Variable Displacement Axial Plunger Pump Maximum Flow (Theoretical Value).......... 270 L/min (71 US gum) (ZW220) 290 L/min (77 US gum) (ZW250) REGULATOR Type.......................................................... Hydraulic Pressure Operated Type PRIORITY VALVE Relief Set Pressure .................................. 27.4 MPa (280 kgf/cm 2 ) @ 70 L/min (18.5 US gpm) (ZW220) 29.4 MPa (300 kgf/cm 2 ) @ 90 L/min (23.8 US gpm) (ZW250) PILOT PUMP Model........................................................
HY/ZFS11/16.8 Type.......................................................... Fixed Displacement Type Gear Pump Maximum Flow (Theoretical Value).......... 35 L/min (9.3 US gpm) CONTROL VALVE ZW220 Type.......................................................... Pilot Pressure Operated Type (2 Spools) Main Relief Set Pressure.......................... 27.4 MPa (280 kgf/cm 2 ) @ 200 L/min (52.8 US gpm) Overload Relief Set Pressure...................
34.3 MPa (350 kgf/cm 2 ) @ 35 L/min (9.3 US gpm) (Lift Arm) 30.4 MPa (310 kgf/cm 2 ) @ 35 L/min (9.3 US gpm) (Bucket Tilt) 30.4 MPa (310 kgf/cm 2 ) @ 50 L/min (13 US gpm) (Bucket Dump) ZW250 Type.......................................................... Pilot Pressure Operated Type (2 Spools) Main Relief Set Pressure.......................... 29.4 MPa (300 kgf/cm 2 ) @ 220 L/min (58 US gpm) Overload Relief Set Pressure................... 36.8 MPa (375 kgf/cm 2 ) @ 50 L/min (13 US gpm) (Lift Arm) 32.5 MPa (330 kgf/cm 2 ) @ 50 L/min (13 US gpm) (Bucket Tilt, Bucket Dump) T1-3-8