hitachi — HYDRAULIC COMPONENT

GENERAL / Component Specifications SWING DEVICE Type ............................................................... Two-Stage Reduction Planetary Gear Reduction Gear Ratio..................................... 23.445 SWING MOTOR Model ............................................................. M5X180CHB-10A-46A Type ............................................................... Swash-Plate Type, Fixed Displacement Axial Plunger Motor VALVE UNIT Type ............................................................... Non Counterbalance Valve Type Relief Set-Pressure........................................

34.3 +1 0 MPa (350 +10 0 kgf/cm 2 , 4990 psi) at 280 L/min (73.9 US gpm) SWING PARKING BRAKE Type ............................................................... Multi-Disc-Wet Negative Type Release Pressure ......................................... 3.3 MPa (34 kgf/cm 2 , 480 psi) SWING DAMPENER VALVE Model ............................................................. 2KR6P72/280-722 Release Pressure ......................................... 32.4 MPa (330 kgf/cm 2 , 4710 psi) TRAVEL DEVICE Type ............................................................... Three-Stage Reduction Planetary Gear Reduction Gear Ratio.....................................

76.066 TRAVEL MOTOR Type ............................................................... Swash-Plate Type Variable Displacement Axial Plunger Motor Model ............................................................. HMK160AF-3UB Maximum Flow (Theoretical Value) (Fast/Slow) ...........................94.0/160.0 L/min (24.8/42.2 US gpm) TRAVEL BRAKE VALVE Type ............................................................... Counterbalance Valve Type Relief Set Pressure ........................................ 34.8 MPa (355 kgf/cm 2 , 5050 psi) TRAVEL PARKING BRAKE Type ...............................................................

Multi-Disc-Wet Negative Type Release Starting Pressure ............................ 1.07 to 1.23 MPa (10.9 to 12.5 kgf/cm 2 , 156 to 179 psi) T1-3-6