Hydraulic Component - Hitachi ZW180 Technical Manual

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
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
Overload Relief Set Pressure................... 34.3 MPa (350 kgf/cm
GENERAL / Component Specifications
(Lift Arm)
30.4 MPa (310 kgf/cm
(Bucket Tilt)
30.4 MPa (310 kgf/cm
(Bucket Dump)
2
) @ 70 L/min (18.5 US gpm)
2
) @ 150 L/min (39.6 US gpm)
2
) @ 35 L/min (9.3 US gpm)
2
) @ 35 L/min (9.3 US gpm)
2
) @ 50 L/min (13 US gpm)
T1-3-7