3) GEAR PUMP 4) MAIN CONTROL VALVE [ ]: Power boost 5) SWING MOTOR 6) TRAVEL MOTOR 1-22 Item Specification Type Fixed displacement gear pump single stage Capacity 15cc/rev Maximum pressure 35kgf/cm2(498psi) Rated oil flow 28.5 /min(7.5U.S. gpm/6.3U.K.
gpm) Item Specification Type 9 spools Operating method Hydraulic pilot system Main relief valve pressure 330kgf/cm2(4690psi)[360kgf/cm2(5120psi)] Overload relief valve pressure 380kgf/cm2(5400psi) Item Specification Type Fixed displacement axial piston motor Capacity 148.5cc/rev Relief pressure 285kgf/cm2(4050psi) Braking system Automatic, spring applied hydraulic released Braking torque 63kgf m(456lbf ft) Brake release pressure 23~50kgf/cm2(327~711psi) Reduction gear type 2 - stage planetary Swing speed 9.0rpm Item Specification Type Variable displacement axial piston motor Relief pressure 345kgf/cm2(4910psi) Capacity(max / min) 160/100cc/rev Reduction gear type 3-stage planetary Braking system Automatic, spring applied hydraulic released Brake release pressure 17~50kgf/cm2(242~711psi) Braking torque 103kgf m(745lbf ft)