hitachi — Hydraulic Component

GENERAL / Component Specifications HYDRAULIC COMPONENT MAIN PUMP Type.......................................................... Bent Axis Type Variable Displacement Axial Plunger Pump Maximum Flow (Theoretical Value).......... 209 L/min (55 US gpm) 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) 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 Type.......................................................... Pilot Pressure Operated Type (2 Spools) Main Relief Set Pressure.......................... 27.4 MPa (280 kgf/cm 2 ) @ 150 L/min (39.6 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) T1-3-7