Lep SC4601002-0EN
Issued 03-07
1002-14
Hydraulic system
Hydraulic pump drive system, directly coupled to the engine (no transmission)
Main pump
Manufacturer............................................................................................................................................... Kawasaki
Pump type .............................................................................................. double variable displacement piston pump
Displacement volume ................................................................................................. 182 cm
3
(11.11 cu in) x 2 /rev
Rated operating pressure .......................................................................................................... 31.4 MPa (4554 psi)
Maximum operating pressure .................................................................................................... 34.3 MPa (4975 psi)
Input revolution speed......................................................................................................1980 min
-1
(at 1980 rpm
-1
)
Maximum discharge flow .................................................. 360 L/min (95.10 gpm) x 2 at 1980 min
-1
(at 1980 rpm
-1
)
Input horsepower ........................................................................................................................................ 221.6 kW
Shaft input horsepower ................................................................................224.7 kW at 1980 min
-1
(at 1980 rpm
-1
)
Shaft input torque .............................................................................................. 1072.8 Nm (791 lb-ft) at 1980 min
-1
Pilot pump
Pump type ............................................................................................................................................... Gear pump
Displacement volume ............................................................................................................ 15 cm
3
(0.91 cu in)/rev
Operating pressure ........................................................................................................................ 3.9 MPa (566 psi)
Maximum flow ....................................................................... 29.7 L/min (7.84 gpm) (at 1980 min
-1
) (at 1980 rpm
-1
)
Input horsepower ............................................................................................................................................ 3.1 kW
Control characteristics
Simultaneous output control of overall.
Negative control.
Electric horse power control.
Control Valve
Model; 4-spool section: integrated (1) or 5-spool section: integrated (1)
Operation method: hydraulic pilot method: travel, swing and operating machine
Maximum flow .......................................................................................................................... 360 L / min (95.10 gpm)
Main relief set pressure.......................................................standard; 31.4 MPa (4554 psi) (at 340 L/min (89.81 gpm))
...................................................................................... power boost; 34.3 MPa (4975 psi) (at 315 L/min (83.21 gpm))
Overload set pressure.............................................. when boom down; 24.5 MPa (3553 psi) (at 20 L/min (5.28 gpm))
..................................................................................................... other: 36.3 MPa (5265 psi) (at 20 L/min (5.28 gpm))
Foot relief set pressure ......................................................................3.38 MPa (490.22 psi) (at 61 L/min (16.11 gpm))
Functions
Straight travel circuit
Boom up / 2-speed internal confluence for arm
Boom/Arm load holding circuit
Boom down regenerative circuit
Arm in forced regenerative circuit
Boom up override variable throttle valve
Swing priority variable throttle valve
Backup 2-speed confluence
Hydraulic Cylinders
Boom cylinder (x2)
Cylinder bore .............................................................................................................................Ø170 mm (Ø6.69 in)
Rod diametre .............................................................................................................................Ø115 mm (Ø4.52 in)
Maximum retracted length .......................................................................................................... 2230 mm (87.79 in)
Stroke ......................................................................................................................................... 1550 mm (61.02 in)
Arm (dipper) cylinder
Cylinder bore .............................................................................................................................Ø200 mm (Ø7.87 in)
Rod diametre .............................................................................................................................Ø140 mm (Ø5.51 in)
Maximum retracted length ........................................................................................................ 2588 mm (101.88 in)
Stroke ......................................................................................................................................... 1820 mm (71.65 in)
Bucket cylinder
Cylinder bore .............................................................................................................................Ø165 mm (Ø6.49 in)
Rod diametre .............................................................................................................................Ø115 mm (Ø4.52 in)
Maximum retracted length .......................................................................................................... 1972 mm (77.63 in)
Stroke ......................................................................................................................................... 1285 mm (50.59 in)
Copyright ©
